{"id":18983,"date":"2025-08-08T22:15:49","date_gmt":"2025-08-08T14:15:49","guid":{"rendered":"https:\/\/92it.top\/?p=18983"},"modified":"2025-08-08T22:15:49","modified_gmt":"2025-08-08T14:15:49","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88mysql%e7%9a%84%e8%a1%8c%e9%94%81%e4%bc%9a%e5%8d%87%e7%ba%a7%e4%b8%ba%e8%a1%a8%e9%94%81%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=18983","title":{"rendered":"\u4e3a\u4ec0\u4e48MySQL\u7684\u884c\u9501\u4f1a\u5347\u7ea7\u4e3a\u8868\u9501\uff1f"},"content":{"rendered":"\n<p>\u8f6c\u8f7d\uff1a<a href=\"https:\/\/golangstar.cn\/backend_series\/advanced_interview\/database_lock.html\">\u4e3a\u4ec0\u4e48MySQL\u7684\u884c\u9501\u4f1a\u5347\u7ea7\u4e3a\u8868\u9501\uff1f<\/a><\/p>\n\n\n\n<p>\u4eca\u5929\u6211\u4eec\u6765\u6df1\u5165\u63a2\u8ba8\u4e00\u4e0bMySQL\u4e2d\u7684\u9501\u673a\u5236\u3002\u5728\u6570\u636e\u5e93\u76f8\u5173\u7684\u9762\u8bd5\u4e2d\uff0c\u9501\u65e0\u7591\u662f\u504f\u5411\u9ad8\u9636\u4e14\u5185\u5bb9\u8f83\u4e3a\u96f6\u6563\u7684\u4e00\u7c7b\u95ee\u9898\u3002\u4f46\u5b83\u7684\u91cd\u8981\u6027\u4e0d\u8a00\u800c\u55bb\uff0c\u6bd4\u5982\u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d\uff0c\u4e00\u6b21\u7a81\u53d1\u7684\u6b7b\u9501\u5c31\u53ef\u80fd\u4e25\u91cd\u5f71\u54cd\u7ebf\u4e0a\u670d\u52a1\u7684\u6027\u80fd\u3002\u8fd9\u5c31\u8981\u6c42\u6211\u4eec\u4f5c\u4e3a\u540e\u7aef\u5de5\u7a0b\u5e08\uff0c\u5fc5\u987b\u5bf9\u9501\u6709\u624e\u5b9e\u7684\u7406\u89e3\u3002\u5e76\u4e14\uff0c\u9501\u7684\u5e95\u5c42\u539f\u7406\u4e0e\u7d22\u5f15\u3001\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u606f\u606f\u76f8\u5173\uff0c\u8fd9\u4e09\u4e2a\u77e5\u8bc6\u70b9\u5e38\u5e38\u5728\u9762\u8bd5\u4e2d\u88ab\u4e32\u8054\u8d77\u6765\u63d0\u95ee\uff0c\u65e0\u8bba\u4ece\u54ea\u4e2a\u70b9\u5207\u5165\uff0c\u90fd\u5f88\u5bb9\u6613\u5ef6\u4f38\u5230\u53e6\u5916\u4e24\u4e2a\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u4e00\u53e5\u8bdd\u603b\u7ed3\u9501\u7684\u7279\u70b9\u5c31\u662f\uff1a<strong>\u65e2\u662f\u96be\u70b9\uff0c\u53c8\u662f\u91cd\u70b9\uff0c\u8fd8\u662f\u70ed\u70b9<\/strong>\u3002\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5c06\u5e26\u4f60\u5f7b\u5e95\u5398\u6e05MySQL\u9501\u7684\u8109\u7edc\uff0c\u5e76\u544a\u8bc9\u4f60\u5982\u4f55\u5728\u9762\u8bd5\u4e2d\u5c06\u5b83\u8f6c\u5316\u4e3a\u4f60\u7684\u6838\u5fc3\u4eae\u70b9\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>1. \u9501\u7684\u6838\u5fc3\u77e5\u8bc6\u56de\u987e<\/strong><\/p>\n\n\n\n<p><strong>1.1 \u9501\u4e0e\u7d22\u5f15\u7684\u5173\u7cfb<\/strong><\/p>\n\n\n\n<p>\u5728MySQL\u7684InnoDB\u5b58\u50a8\u5f15\u64ce\u91cc\uff0c\u4f60\u5fc5\u987b\u7262\u8bb0\u4e00\u4e2a\u6838\u5fc3\u539f\u5219\uff1a<strong>\u9501\u662f\u501f\u52a9\u7d22\u5f15\u6765\u5b9e\u73b0\u7684<\/strong>\u3002\u66f4\u5177\u4f53\u5730\u8bf4\uff0c\u52a0\u9501\u64cd\u4f5c\u9501\u4f4f\u7684\u5e76\u975e\u6570\u636e\u884c\u672c\u8eab\uff0c\u800c\u662f\u6570\u636e\u884c\u5bf9\u5e94\u7684<strong>\u7d22\u5f15\u9879<\/strong>\u3002\u4eceB+\u6811\u7684\u7ed3\u6784\u6765\u770b\uff0c\u6700\u7ec8\u9501\u5b9a\u7684\u5c31\u662f\u53f6\u5b50\u8282\u70b9\u4e0a\u7684\u7d22\u5f15\u8bb0\u5f55\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"407\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-258-1024x407.png\" alt=\"\" class=\"wp-image-18984\" style=\"width:534px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-258-1024x407.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-258-300x119.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-258-768x305.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-258-830x330.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-258-230x91.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-258-350x139.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-258-480x191.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-258.png 1264w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u53ea\u8981\u4f60\u4ece\u8fd9\u4e2a\u89c6\u89d2\u51fa\u53d1\uff0c\u5c31\u80fd\u7406\u89e3\u7edd\u5927\u591a\u6570\u4e0e\u9501\u76f8\u5173\u7684\u3001\u770b\u4f3c\u5343\u5947\u767e\u602a\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u4e00\u4e2a\u8868\u53ef\u80fd\u5b58\u5728\u591a\u4e2a\u7d22\u5f15\uff0c\u90a3\u4e48\u52a0\u9501\u65f6\u7a76\u7adf\u4f1a\u9501\u5b9a\u54ea\u4e2a\u7d22\u5f15\u5462\uff1f\u7b54\u6848\u662f\uff1a<strong>\u67e5\u8be2\u4f18\u5316\u5668\u6700\u7ec8\u9009\u62e9\u4f7f\u7528\u7684\u90a3\u4e2a\u7d22\u5f15<\/strong>\u3002\u90a3\u4e48\uff0c\u5982\u679c\u4e00\u6761\u67e5\u8be2\u8bed\u53e5\u56e0\u4e3a\u6ca1\u6709\u5408\u9002\u7684\u7d22\u5f15\u800c\u8d70\u4e86\u5168\u8868\u626b\u63cf\u5462\uff1f\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cInnoDB\u65e0\u6cd5\u5728\u7d22\u5f15\u4e0a\u5b9e\u73b0\u884c\u7ea7\u522b\u7684\u9501\u5b9a\uff0c\u53ea\u80fd\u9000\u800c\u6c42\u5176\u6b21\uff0c\u5c06\u9501\u7684\u7c92\u5ea6\u4ece&#8221;\u884c&#8221;\u4e0a\u5347\u5230&#8221;\u8868&#8221;\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u5e38\u8bf4\u7684<strong>\u8868\u9501<\/strong>\u3002<\/p>\n\n\n\n<p>\u518d\u6765\u770b\u4e00\u4e2a\u6709\u8da3\u7684\u573a\u666f\uff1a\u5982\u679c\u67e5\u8be2\u6761\u4ef6\u6240\u6307\u5b9a\u7684\u503c\u5728\u6570\u636e\u5e93\u4e2d\u6839\u672c\u4e0d\u5b58\u5728\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">-- \u5c1d\u8bd5\u9501\u5b9a\u4e00\u4e2a\u4e0d\u5b58\u5728\u7684\u8bb0\u5f55\nSELECT * FROM your_tab WHERE id = 150 FOR UPDATE;<\/pre>\n\n\n\n<p>\u6b64\u65f6id=150\u8fd9\u6761\u8bb0\u5f55\u4e0d\u5b58\u5728\uff0c\u9501\u4f1a\u5982\u4f55\u4f5c\u7528\uff1fInnoDB\u5f15\u64ce\u4f1a\u5229\u7528B+\u6811\u7d22\u5f15\u7684\u6709\u5e8f\u6027\uff0c\u627e\u5230\u4e0e150\u76f8\u90bb\u7684\u7d22\u5f15\u8bb0\u5f55\uff08\u4f8b\u5982120\u548c170\uff09\uff0c\u5e76\u5728\u8fd9\u4e24\u6761\u8bb0\u5f55\u4e4b\u95f4\u6784\u5efa\u4e00\u4e2a<strong>\u4e34\u952e\u9501 (Next-Key Lock)<\/strong>\uff0c\u5176\u9501\u5b9a\u7684\u8303\u56f4\u662f(120, 170]\u3002<a href=\"https:\/\/golangstar.cn\/backend_series\/advanced_interview\/database_lock.html#_1-1-\u9501\u4e0e\u7d22\u5f15\u7684\u5173\u7cfb\"><\/a><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"491\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-260-1024x491.png\" alt=\"\" class=\"wp-image-18986\" style=\"width:554px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-260-1024x491.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-260-300x144.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-260-768x368.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-260-1536x736.png 1536w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-260-830x398.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-260-230x110.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-260-350x168.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-260-480x230.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-260.png 1548w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u8fd9\u4e2a\u4e34\u952e\u9501\u7684\u4f5c\u7528\u5c31\u662f\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u5411\u8fd9\u4e2a&#8221;\u95f4\u9699&#8221;\u4e2d\u63d2\u5165id=150\u7684\u65b0\u8bb0\u5f55\u3002<\/p>\n\n\n\n<p>\u90a3\u4e48\u8303\u56f4\u67e5\u8be2\u5462\uff1f\u5176\u539f\u7406\u4e5f\u662f\u7c7b\u4f3c\u7684\u3002InnoDB\u4f1a\u5229\u7528\u7d22\u5f15\u6570\u636e\uff0c\u6784\u9020\u4e00\u4e2a\u521a\u597d\u80fd\u8986\u76d6\u6574\u4e2a\u67e5\u8be2\u8303\u56f4\u7684\u4e34\u952e\u9501\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">-- \u5bf9id\u5927\u4e8e330\u7684\u8bb0\u5f55\u8fdb\u884c\u8303\u56f4\u52a0\u9501\nSELECT * FROM your_tab WHERE id > 330 FOR UPDATE;<\/pre>\n\n\n\n<p>\u5bf9\u4e8e\u8fd9\u6761\u8bed\u53e5\uff0cInnoDB\u4f1a\u6784\u5efa\u4e00\u4e2a\u8986\u76d6\u8303\u56f4\u4e3a(330, supremum]\u7684\u4e34\u952e\u9501\u3002\u8fd9\u91cc\u7684<code>supremum<\/code>\u4f60\u53ef\u4ee5\u76f4\u89c2\u5730\u7406\u89e3\u4e3aInnoDB\u5185\u90e8\u5b9a\u4e49\u7684\u4e00\u4e2a\u865a\u62df\u7684\u6700\u5927\u503c\uff0c\u4ee3\u8868\u6b63\u65e0\u7a77\u3002<a href=\"https:\/\/golangstar.cn\/backend_series\/advanced_interview\/database_lock.html#_1-\u9501\u7684\u6838\u5fc3\u77e5\u8bc6\u56de\u987e\"><\/a><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"380\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-261-1024x380.png\" alt=\"\" class=\"wp-image-18987\" style=\"width:538px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-261-1024x380.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-261-300x111.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-261-768x285.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-261-1536x571.png 1536w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-261-830x308.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-261-230x85.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-261-350x130.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-261-480x178.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-261.png 1540w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u7efc\u4e0a\u6240\u8ff0\uff0c\u6211\u4eec\u5f97\u51fa\u4e00\u4e2a\u81f3\u5173\u91cd\u8981\u7684\u7ed3\u8bba\uff1a<strong>\u9501\u4e0e\u7d22\u5f15\u5bc6\u4e0d\u53ef\u5206\uff0c\u9501\u7684\u7c92\u5ea6\u548c\u6548\u7387\u76f4\u63a5\u53d6\u51b3\u4e8e\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u51b5<\/strong>\u3002<\/p>\n\n\n\n<p><strong>1.2 \u9501\u7684\u91ca\u653e\u65f6\u673a<\/strong><\/p>\n\n\n\n<p>\u5f88\u591a\u5f00\u53d1\u8005\u5728\u5b66\u4e60\u9501\u65f6\u4f1a\u9677\u5165\u4e00\u4e2a\u8bef\u533a\uff0c\u8ba4\u4e3a\u9501\u5728SQL\u8bed\u53e5\u6267\u884c\u5b8c\u6bd5\u540e\u5c31\u4f1a\u7acb\u523b\u88ab\u91ca\u653e\u3002\u8fd9\u662f\u4e00\u4e2a\u9519\u8bef\u7684\u89c2\u5ff5\u3002\u5b9e\u9645\u4e0a\uff0c<strong>InnoDB\u4e2d\u7684\u9501\u662f\u5728\u6574\u4e2a\u4e8b\u52a1\u7ed3\u675f\u65f6\u624d\u4f1a\u88ab\u91ca\u653e\u7684<\/strong>\u3002\u65e0\u8bba\u4f60\u662f\u6267\u884c<code>COMMIT<\/code>\u63d0\u4ea4\u4e8b\u52a1\uff0c\u8fd8\u662f<code>ROLLBACK<\/code>\u56de\u6eda\u4e8b\u52a1\uff0c\u4e8b\u52a1\u5185\u6240\u6709\u6301\u6709\u7684\u9501\u90fd\u4f1a\u5728\u90a3\u4e2a\u65f6\u523b\u88ab\u7edf\u4e00\u91ca\u653e\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"731\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-262-1024x731.png\" alt=\"\" class=\"wp-image-18988\" style=\"width:480px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-262-1024x731.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-262-300x214.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-262-768x548.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-262-830x592.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-262-230x164.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-262-350x250.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-262-480x343.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-262.png 1488w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u6362\u8a00\u4e4b\uff0c\u4e00\u4e2a\u4e8b\u52a1\u4e00\u65e6\u7ed9\u67d0\u4efd\u6570\u636e\u52a0\u4e0a\u4e86\u9501\uff0c\u8fd9\u628a\u9501\u5c31\u4f1a\u88ab\u4e00\u76f4\u6301\u6709\uff0c\u76f4\u5230\u4e8b\u52a1\u7684\u7ec8\u70b9\u3002<\/p>\n\n\n\n<p><strong>\u6838\u5fc3\u539f\u7406\uff1aInnoDB \u7684 \u201c\u7d22\u5f15\u5373\u6570\u636e\u201d \u7279\u6027<\/strong><\/p>\n\n\n\n<p>InnoDB \u4e2d\u6700\u7279\u6b8a\u7684\u4e00\u70b9\u662f<strong>\u805a\u7c07\u7d22\u5f15\uff08Clustered Index\uff09<\/strong>&nbsp;\u7684\u8bbe\u8ba1\uff1a<\/p>\n\n\n\n<ul>\n<li>\u805a\u7c07\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\u4e0d\u4ec5\u5b58\u50a8\u7d22\u5f15\u952e\u503c\uff0c\u8fd8\u76f4\u63a5\u5305\u542b\u5b8c\u6574\u7684\u6570\u636e\u884c\uff08\u5373 \u201c\u7d22\u5f15\u548c\u6570\u636e\u5b58\u653e\u5728\u4e00\u8d77\u201d\uff09\u3002<\/li>\n\n\n\n<li>\u975e\u805a\u7c07\u7d22\u5f15\uff08\u4e8c\u7ea7\u7d22\u5f15\uff09\u7684\u53f6\u5b50\u8282\u70b9\u53ea\u5b58\u50a8\u7d22\u5f15\u952e\u503c\u548c\u805a\u7c07\u7d22\u5f15\u7684\u4e3b\u952e\u503c\uff08\u901a\u8fc7\u4e3b\u952e\u503c\u56de\u8868\u67e5\u8be2\u5b8c\u6574\u6570\u636e\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u79cd\u8bbe\u8ba1\u5bfc\u81f4\uff1a<strong>\u8bbf\u95ee\u6570\u636e\u5fc5\u987b\u901a\u8fc7\u7d22\u5f15<\/strong>\u2014\u2014 \u65e0\u8bba\u662f\u901a\u8fc7\u805a\u7c07\u7d22\u5f15\u76f4\u63a5\u5b9a\u4f4d\u6570\u636e\uff0c\u8fd8\u662f\u901a\u8fc7\u4e8c\u7ea7\u7d22\u5f15\u56de\u8868\uff0c\u6700\u7ec8\u90fd\u8981\u901a\u8fc7\u7d22\u5f15\u7684 B + \u6811\u7ed3\u6784\u627e\u5230\u76ee\u6807\u8bb0\u5f55\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u5f53\u9700\u8981\u5bf9\u6570\u636e\u884c\u52a0\u9501\u65f6\uff0cInnoDB \u65e0\u6cd5\u76f4\u63a5 \u201c\u9501\u5b9a\u6570\u636e\u884c\u201d\uff08\u6570\u636e\u884c\u672c\u8eab\u6ca1\u6709\u72ec\u7acb\u7684\u5b58\u50a8\u5730\u5740\u6807\u8bc6\uff09\uff0c\u53ea\u80fd\u901a\u8fc7\u9501\u5b9a\u6570\u636e\u884c\u5bf9\u5e94\u7684<strong>\u7d22\u5f15\u9879<\/strong>\uff08B + \u6811\u53f6\u5b50\u8282\u70b9\u4e0a\u7684\u8bb0\u5f55\uff09\u6765\u5b9e\u73b0\u3002<\/p>\n\n\n\n<p><strong>\u5177\u4f53\u573a\u666f\uff1a\u9501\u5982\u4f55\u901a\u8fc7\u7d22\u5f15\u9879\u751f\u6548\uff1f<\/strong><\/p>\n\n\n\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u5f20\u8868\u00a0<code>user<\/code>\uff0c\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">CREATE TABLE user (\n  id INT PRIMARY KEY,  -- \u805a\u7c07\u7d22\u5f15\uff08\u4e3b\u952e\u7d22\u5f15\uff09\n  name VARCHAR(50),\n  age INT,\n  INDEX idx_age (age)  -- \u4e8c\u7ea7\u7d22\u5f15\n) ENGINE=InnoDB;<\/pre>\n\n\n\n<p>\u8868\u4e2d\u6570\u636e\u5982\u4e0b\uff08\u805a\u7c07\u7d22\u5f15 B + \u6811\u7684\u53f6\u5b50\u8282\u70b9\u7ed3\u6784\u793a\u610f\uff09\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>\u805a\u7c07\u7d22\u5f15\u9879\uff08id\uff09<\/th><th>\u6570\u636e\u884c\uff08name, age\uff09<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>(&#8216; \u5f20\u4e09 &#8216;, 20)<\/td><\/tr><tr><td>3<\/td><td>(&#8216; \u674e\u56db &#8216;, 25)<\/td><\/tr><tr><td>5<\/td><td>(&#8216; \u738b\u4e94 &#8216;, 20)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u573a\u666f 1\uff1a\u901a\u8fc7\u4e3b\u952e\u7d22\u5f15\u52a0\u9501<\/strong><\/p>\n\n\n\n<p>\u6267\u884c&nbsp;<code>UPDATE user SET name='\u5f20\u4e09\u4e09' WHERE id=1 FOR UPDATE;<\/code>&nbsp;\u65f6\uff1a<\/p>\n\n\n\n<ul>\n<li>InnoDB \u4f1a\u5148\u901a\u8fc7\u805a\u7c07\u7d22\u5f15\uff08B + \u6811\uff09\u5b9a\u4f4d\u5230\u00a0<code>id=1<\/code>\u00a0\u7684\u53f6\u5b50\u8282\u70b9\uff08\u7d22\u5f15\u9879\uff09\u3002<\/li>\n\n\n\n<li>\u9501\u5b9a\u8be5\u7d22\u5f15\u9879\uff08\u805a\u7c07\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\u8bb0\u5f55\uff09\u3002\u6b64\u65f6\uff0c\u5176\u4ed6\u4e8b\u52a1\u82e5\u8981\u64cd\u4f5c\u00a0<code>id=1<\/code>\u00a0\u7684\u884c\uff08\u65e0\u8bba\u901a\u8fc7\u4f55\u79cd\u65b9\u5f0f\uff09\uff0c\u5fc5\u987b\u8bbf\u95ee\u8be5\u7d22\u5f15\u9879\uff0c\u56e0\u6b64\u4f1a\u88ab\u963b\u585e\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u91cc\u7684\u5173\u952e\u662f\uff1a<strong>\u9501\u5b9a\u7684\u662f\u805a\u7c07\u7d22\u5f15\u4e2d\u00a0<code>id=1<\/code>\u00a0\u5bf9\u5e94\u7684\u7d22\u5f15\u9879\uff0c\u800c\u975e\u7269\u7406\u4e0a\u7684\u6570\u636e\u884c<\/strong>\u3002\u4f46\u7531\u4e8e\u805a\u7c07\u7d22\u5f15\u5305\u542b\u5b8c\u6574\u6570\u636e\uff0c\u9501\u5b9a\u7d22\u5f15\u9879\u5c31\u7b49\u540c\u4e8e \u201c\u9501\u4f4f\u4e86\u6570\u636e\u884c\u201d\u3002<\/p>\n\n\n\n<p><strong>\u573a\u666f 2\uff1a\u901a\u8fc7\u4e8c\u7ea7\u7d22\u5f15\u52a0\u9501<\/strong><\/p>\n\n\n\n<p>\u6267\u884c&nbsp;<code>UPDATE user SET name='\u738b\u4e94\u4e94' WHERE age=20 FOR UPDATE;<\/code>&nbsp;\u65f6\uff1a<\/p>\n\n\n\n<ul>\n<li>\u9996\u5148\u901a\u8fc7\u4e8c\u7ea7\u7d22\u5f15\u00a0<code>idx_age<\/code>\uff08B + \u6811\uff09\u5b9a\u4f4d\u5230\u00a0<code>age=20<\/code>\u00a0\u7684\u53f6\u5b50\u8282\u70b9\uff08\u7d22\u5f15\u9879\u5305\u542b\u00a0<code>age=20<\/code>\u00a0\u548c\u5bf9\u5e94\u7684\u4e3b\u952e\u00a0<code>id=1<\/code>\u3001<code>id=5<\/code>\uff09\u3002<\/li>\n\n\n\n<li>InnoDB \u4f1a\u5148\u9501\u5b9a\u4e8c\u7ea7\u7d22\u5f15\u4e2d\u00a0<code>age=20<\/code>\u00a0\u5bf9\u5e94\u7684\u7d22\u5f15\u9879\uff08\u5373\u00a0<code>(20,1)<\/code>\u00a0\u548c\u00a0<code>(20,5)<\/code>\u00a0\u8fd9\u4e24\u4e2a\u4e8c\u7ea7\u7d22\u5f15\u8bb0\u5f55\uff09\u3002<\/li>\n\n\n\n<li>\u540c\u65f6\uff0c\u4e3a\u4e86\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u901a\u8fc7\u805a\u7c07\u7d22\u5f15\u4fee\u6539\u6570\u636e\uff0cInnoDB \u4f1a<strong>\u56de\u8868<\/strong>\u627e\u5230\u805a\u7c07\u7d22\u5f15\u4e2d\u00a0<code>id=1<\/code>\u00a0\u548c\u00a0<code>id=5<\/code>\u00a0\u7684\u7d22\u5f15\u9879\uff0c\u5e76\u9501\u5b9a\u8fd9\u4e9b\u805a\u7c07\u7d22\u5f15\u9879\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u6b64\u65f6\uff0c\u9501\u5b9a\u7684\u5bf9\u8c61\u4ecd\u7136\u662f<strong>\u4e8c\u7ea7\u7d22\u5f15\u548c\u805a\u7c07\u7d22\u5f15\u7684\u7d22\u5f15\u9879<\/strong>\uff0c\u800c\u975e\u6570\u636e\u884c\u672c\u8eab\u3002\u5176\u4ed6\u4e8b\u52a1\u82e5\u8981\u4fee\u6539\u8fd9\u4e24\u884c\u6570\u636e\uff0c\u65e0\u8bba\u662f\u901a\u8fc7\u00a0<code>age<\/code>\u00a0\u6761\u4ef6\u8fd8\u662f\u00a0<code>id<\/code>\u00a0\u6761\u4ef6\uff0c\u90fd\u4f1a\u56e0\u8bbf\u95ee\u88ab\u9501\u5b9a\u7684\u7d22\u5f15\u9879\u800c\u963b\u585e\u3002<\/p>\n\n\n\n<p><strong>\u5e95\u5c42\u903b\u8f91\uff1a\u4e3a\u4ec0\u4e48\u5fc5\u987b\u901a\u8fc7\u7d22\u5f15\u52a0\u9501\uff1f<\/strong><\/p>\n\n\n\n<ol>\n<li><strong>B + \u6811\u662f\u6570\u636e\u8bbf\u95ee\u7684\u552f\u4e00\u5165\u53e3<\/strong><br>InnoDB \u4e2d\uff0c\u6240\u6709\u6570\u636e\u90fd\u901a\u8fc7 B + \u6811\u7d22\u5f15\u7ec4\u7ec7\uff0c\u6ca1\u6709 \u201c\u76f4\u63a5\u8bbf\u95ee\u6570\u636e\u884c\u201d \u7684\u8def\u5f84\u3002\u4e8b\u52a1\u8981\u64cd\u4f5c\u67d0\u884c\u6570\u636e\uff0c\u5fc5\u987b\u5148\u901a\u8fc7\u7d22\u5f15\u5b9a\u4f4d\u5230\u5bf9\u5e94\u7684\u53f6\u5b50\u8282\u70b9 \u2014\u2014 \u56e0\u6b64\uff0c\u9501\u53ea\u80fd\u52a0\u5728\u7d22\u5f15\u9879\u4e0a\uff0c\u624d\u80fd\u62e6\u622a\u5176\u4ed6\u4e8b\u52a1\u7684\u8bbf\u95ee\u3002<\/li>\n\n\n\n<li><strong>\u9501\u9700\u8981\u4f9d\u8d56\u7d22\u5f15\u7684\u6709\u5e8f\u6027<\/strong><br>InnoDB \u7684\u884c\u9501\uff08\u5982 Record Lock\uff09\u3001\u95f4\u9699\u9501\uff08Gap Lock\uff09\u7b49\uff0c\u9700\u8981\u901a\u8fc7\u7d22\u5f15\u7684\u6709\u5e8f\u6027\u6765\u786e\u5b9a\u9501\u5b9a\u8303\u56f4\u3002\u4f8b\u5982\uff1a\n<ul>\n<li>\u95f4\u9699\u9501\u9501\u5b9a\u7684\u662f \u201c\u4e24\u4e2a\u7d22\u5f15\u9879\u4e4b\u95f4\u7684\u533a\u95f4\u201d\uff08\u5982\u00a0<code>age=20<\/code>\u00a0\u548c\u00a0<code>age=25<\/code>\u00a0\u4e4b\u95f4\u7684\u95f4\u9699\uff09\uff0c\u82e5\u6ca1\u6709\u7d22\u5f15\uff0c\u65e0\u6cd5\u5b9a\u4e49 \u201c\u533a\u95f4\u201d\u3002<\/li>\n\n\n\n<li>\u8303\u56f4\u67e5\u8be2\uff08\u5982\u00a0<code>WHERE age BETWEEN 20 AND 30<\/code>\uff09\u7684\u52a0\u9501\uff0c\u4f9d\u8d56\u4e8c\u7ea7\u7d22\u5f15\u7684 B + \u6811\u987a\u5e8f\u6765\u5b9a\u4f4d\u9501\u5b9a\u7684\u7d22\u5f15\u9879\u8303\u56f4\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u65e0\u7d22\u5f15\u65f6\u7684 \u201c\u9690\u5f0f\u9501\u201d \u4e0e\u8868\u9501\u98ce\u9669<\/strong><br>\u5982\u679c\u67e5\u8be2\u6761\u4ef6<strong>\u6ca1\u6709\u4f7f\u7528\u4efb\u4f55\u7d22\u5f15<\/strong>\uff08\u5982\u00a0<code>WHERE name='\u5f20\u4e09'<\/code>\uff0c\u800c\u00a0<code>name<\/code>\u00a0\u65e0\u7d22\u5f15\uff09\uff0cInnoDB \u65e0\u6cd5\u901a\u8fc7\u7d22\u5f15\u5b9a\u4f4d\u8bb0\u5f55\uff0c\u4f1a\u89e6\u53d1<strong>\u5168\u8868\u626b\u63cf<\/strong>\u3002\u6b64\u65f6\uff1a\n<ul>\n<li>InnoDB \u4f1a\u5bf9\u626b\u63cf\u5230\u7684\u6bcf\u4e00\u884c\u6570\u636e<strong>\u9690\u5f0f\u52a0\u9501<\/strong>\uff08\u901a\u8fc7\u9690\u85cf\u7684\u805a\u7c07\u7d22\u5f15\u4e3b\u952e\u5b9e\u73b0\uff09\u3002<\/li>\n\n\n\n<li>\u6781\u7aef\u60c5\u51b5\u4e0b\uff0c\u82e5\u5168\u8868\u626b\u63cf\u6d89\u53ca\u6240\u6709\u884c\uff0c\u53ef\u80fd\u5347\u7ea7\u4e3a\u8868\u9501\uff08\u610f\u5411\u9501\uff09\uff0c\u5bfc\u81f4\u5e76\u53d1\u6027\u80fd\u6025\u5267\u4e0b\u964d\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p><strong>\u5173\u952e\u7ed3\u8bba\uff1a\u9501\u7684\u672c\u8d28\u662f \u201c\u7d22\u5f15\u9879\u7684\u6807\u8bb0\u201d<\/strong><\/p>\n\n\n\n<ul>\n<li>\u4ece B + \u6811\u7ed3\u6784\u770b\uff1a\u9501\u6700\u7ec8\u843d\u5728<strong>\u53f6\u5b50\u8282\u70b9\u7684\u7d22\u5f15\u8bb0\u5f55<\/strong>\u4e0a\uff08\u805a\u7c07\u7d22\u5f15\u6216\u4e8c\u7ea7\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\uff09\u3002<\/li>\n\n\n\n<li>\u4ece\u6548\u679c\u770b\uff1a\u9501\u5b9a\u7d22\u5f15\u9879\u7b49\u4ef7\u4e8e\u9501\u5b9a\u6570\u636e\u884c\uff08\u56e0\u4e3a\u7d22\u5f15\u9879\u76f4\u63a5\u5173\u8054\u6570\u636e\uff09\uff0c\u4f46\u5e95\u5c42\u5b9e\u73b0\u4f9d\u8d56\u7d22\u5f15\u7684\u5b58\u5728\u3002<\/li>\n\n\n\n<li>\u4ece\u5e76\u53d1\u63a7\u5236\u770b\uff1a\u7d22\u5f15\u7684\u6709\u5e8f\u6027\u8ba9 InnoDB \u80fd\u9ad8\u6548\u9501\u5b9a \u201c\u7279\u5b9a\u8303\u56f4\u201d\uff08\u5982\u5355\u884c\u3001\u95f4\u9699\u3001\u8303\u56f4\uff09\uff0c\u800c\u65e0\u9700\u626b\u63cf\u5168\u8868\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u56e0\u6b64\uff0c\u5728 InnoDB \u4e2d\uff0c<strong>\u201c\u65e0\u7d22\u5f15\u5219\u65e0\u884c\u9501\u201d<\/strong>\u2014\u2014 \u5982\u679c\u67e5\u8be2\u4e0d\u547d\u4e2d\u4efb\u4f55\u7d22\u5f15\uff0c\u52a0\u9501\u4f1a\u9000\u5316\u4e3a\u4f4e\u6548\u7684\u5168\u8868\u626b\u63cf\u52a0\u9501\uff0c\u751a\u81f3\u8868\u9501\u3002\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e2d\uff0c\u5fc5\u987b\u4e3a\u67e5\u8be2\u6761\u4ef6\u8bbe\u8ba1\u5408\u7406\u7684\u7d22\u5f15\uff1a\u4e0d\u4ec5\u4e3a\u4e86\u67e5\u8be2\u6548\u7387\uff0c\u66f4\u662f\u4e3a\u4e86\u8ba9\u9501\u80fd\u7cbe\u51c6\u4f5c\u7528\u4e8e\u76ee\u6807\u6570\u636e\uff0c\u907f\u514d\u5e76\u53d1\u963b\u585e\u3002<\/p>\n\n\n\n<p><strong>1.3 \u4e50\u89c2\u9501\u4e0e\u60b2\u89c2\u9501<\/strong><\/p>\n\n\n\n<p>\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u5e76\u975e\u7269\u7406\u4e0a\u771f\u5b9e\u5b58\u5728\u7684\u9501\uff0c\u800c\u662f\u4e24\u79cd\u5e76\u53d1\u63a7\u5236\u7684\u903b\u8f91\u601d\u60f3\u548c\u8bbe\u8ba1\u54f2\u5b66\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u60b2\u89c2\u9501<\/strong>\uff1a\u5b83\u603b\u662f\u5047\u8bbe\u6700\u574f\u7684\u60c5\u51b5\uff0c\u8ba4\u4e3a\u6570\u636e\u5728\u4efb\u4f55\u65f6\u5019\u90fd\u53ef\u80fd\u88ab\u5176\u4ed6\u4e8b\u52a1\u4fee\u6539\u3002\u56e0\u6b64\uff0c\u5728\u64cd\u4f5c\u6570\u636e\u4e4b\u524d\uff0c\u5b83\u4f1a\u5148\u5c06\u6570\u636e\u9501\u5b9a\uff0c\u4ee5\u963b\u6b62\u4efb\u4f55\u53ef\u80fd\u7684\u5e76\u53d1\u4fee\u6539\u3002<code>SELECT ... FOR UPDATE<\/code>\u5c31\u662f\u60b2\u89c2\u9501\u6700\u5178\u578b\u7684\u5b9e\u73b0\u3002<\/li>\n\n\n\n<li><strong>\u4e50\u89c2\u9501<\/strong>\uff1a\u5b83\u5219\u6301\u6709\u975e\u5e38&#8221;\u4e50\u89c2&#8221;\u7684\u6001\u5ea6\uff0c\u5047\u8bbe\u5728\u81ea\u5df1\u64cd\u4f5c\u6570\u636e\u7684\u8fd9\u6bb5\u65f6\u95f4\u91cc\uff0c\u522b\u4eba\u4e0d\u4f1a\u6765\u4fee\u6539\u5b83\u3002\u56e0\u6b64\uff0c\u5b83\u5728\u64cd\u4f5c\u6570\u636e\u65f6\u4e0d\u4f1a\u52a0\u9501\uff0c\u800c\u662f\u5728\u6700\u540e\u63d0\u4ea4\u66f4\u65b0\u7684\u65f6\u5019\uff0c\u53bb\u68c0\u67e5\u4e00\u4e0b\u6570\u636e\u662f\u5426\u88ab\u4fee\u6539\u8fc7\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u4e50\u89c2\u9501\u901a\u5e38\u6307\u5229\u7528\u7c7b\u4f3cCAS\uff08Compare-And-Swap\uff0c\u6bd4\u8f83\u5e76\u4ea4\u6362\uff09\u7684\u601d\u8def\u53bb\u66f4\u65b0\u6570\u636e\u3002\u5176\u4e00\u822c\u7684\u4f7f\u7528\u5f62\u6001\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">-- 1. \u5148\u67e5\u8be2\u51fa\u6570\u636e\uff0c\u83b7\u53d6\u5f53\u524d\u503c\uff08\u6bd4\u5982 a=1\uff09\nSELECT * FROM your_tab WHERE id=1; \n\n-- ... \u5728\u5e94\u7528\u5c42\u6267\u884c\u4e00\u7cfb\u5217\u590d\u6742\u7684\u4e1a\u52a1\u903b\u8f91 ...\n\n-- 2. \u66f4\u65b0\u65f6\uff0c\u5c06\u4e4b\u524d\u67e5\u8be2\u5230\u7684\u503c\u4f5c\u4e3aWHERE\u6761\u4ef6\u7684\u4e00\u90e8\u5206\nUPDATE your_tab SET a=3, b=4 WHERE id=1 AND a=1;<\/pre>\n\n\n\n<p>\u5728\u4e0a\u8ff0UPDATE\u8bed\u53e5\u4e2d\uff0c\u6211\u4eec\u9884\u671f\u6570\u636e\u5e93\u4e2d<code>a<\/code>\u7684\u503c\u4ecd\u7136\u662f\u6211\u4eec\u6700\u521d\u8bfb\u5230\u76841\u3002\u5982\u679c\u5728\u6211\u4eec\u8fdb\u884c\u4e1a\u52a1\u64cd\u4f5c\u671f\u95f4\uff0c<code>a<\/code>\u7684\u503c\u88ab\u5176\u4ed6\u4e8b\u52a1\u4fee\u6539\u4e86\uff0c\u90a3\u4e48\u8fd9\u6761UPDATE\u8bed\u53e5\u7684WHERE\u6761\u4ef6\u5c06\u4e0d\u6210\u7acb\uff0c\u66f4\u65b0\u64cd\u4f5c\u5c31\u4f1a\u5931\u8d25\uff08\u5f71\u54cd\u884c\u6570\u4e3a0\uff09\u3002\u4e1a\u52a1\u65b9\u901a\u8fc7\u5224\u65ad\u53d7\u5f71\u54cd\u7684\u884c\u6570\uff0c\u5c31\u80fd\u5f97\u77e5\u6b64\u6b21\u5e76\u53d1\u66f4\u65b0\u662f\u5426\u6210\u529f\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"624\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-263-1024x624.png\" alt=\"\" class=\"wp-image-18990\" style=\"width:536px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-263-1024x624.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-263-300x183.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-263-768x468.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-263-830x505.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-263-230x140.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-263-350x213.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-263-480x292.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-263.png 1284w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u800c\u60b2\u89c2\u9501\u7684\u5b9e\u73b0\u5219\u66f4\u4e3a\u76f4\u63a5\uff0c\u5b83\u4ece\u4e00\u5f00\u59cb\u5c31\u9501\u5b9a\u4e86\u8d44\u6e90\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">-- 1. \u5728\u67e5\u8be2\u65f6\u5c31\u76f4\u63a5\u52a0\u4e0a\u6392\u5b83\u9501\nSELECT * FROM your_tab WHERE id=1 FOR UPDATE;\n\n-- ... \u5728\u5e94\u7528\u5c42\u6267\u884c\u4e00\u7cfb\u5217\u590d\u6742\u7684\u4e1a\u52a1\u903b\u8f91 ...\n\n-- 2. \u76f4\u63a5\u66f4\u65b0\u6570\u636e\uff0c\u56e0\u4e3a\u6570\u636e\u5df2\u88ab\u9501\u5b9a\uff0c\u65e0\u9700\u62c5\u5fc3\u88ab\u4fee\u6539\nUPDATE your_tab SET a=3, b=4 WHERE id=1;<\/pre>\n\n\n\n<p>\u5728\u9009\u62e9\u8fd9\u4e24\u79cd\u9501\u65f6\uff0c\u9700\u8981\u6743\u8861\u6570\u636e\u4e00\u81f4\u6027\u4e0e\u5e76\u53d1\u6027\u80fd\u3002\u4e50\u89c2\u9501\u66f4\u9002\u7528\u4e8e<strong>\u8bfb\u591a\u5199\u5c11<\/strong>\u7684\u573a\u666f\uff0c\u8fd9\u4e5f\u662f\u7edd\u5927\u591a\u6570\u4e92\u8054\u7f51\u5e94\u7528\u7684\u7279\u5f81\uff0c\u5b83\u7684\u6027\u80fd\u5f00\u9500\u66f4\u5c0f\u3002\u800c\u60b2\u89c2\u9501\u5219\u9002\u7528\u4e8e<strong>\u5199\u591a\u8bfb\u5c11<\/strong>\u6216\u5bf9\u6570\u636e\u4e00\u81f4\u6027\u8981\u6c42\u6781\u9ad8\u7684\u573a\u666f\uff0c\u4f8b\u5982\u91d1\u878d\u9886\u57df\u5bf9\u8d26\u6237\u91d1\u989d\u7684\u64cd\u4f5c\uff0c\u901a\u5e38\u4ee5\u5199\u64cd\u4f5c\u4e3a\u4e3b\u3002<\/p>\n\n\n\n<p>\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u4e50\u89c2\u9501\u80fd\u63d0\u4f9b\u66f4\u597d\u7684\u5e76\u53d1\u6027\u80fd\u3002\u4e0d\u8fc7\uff0c\u7531\u4e8e\u5176\u5b9e\u73b0\u903b\u8f91\u9700\u8981\u5e94\u7528\u5c42\u914d\u5408\uff0c\u5199\u8d77\u6765\u76f8\u5bf9\u590d\u6742\uff0c\u6240\u4ee5\u5f88\u591a\u5f00\u53d1\u8005\u4e3a\u4e86\u56fe\u7701\u4e8b\uff0c\u4f1a\u503e\u5411\u4e8e\u76f4\u63a5\u4f7f\u7528\u60b2\u89c2\u9501\u3002<\/p>\n\n\n\n<p>1.4 <strong>\u884c\u9501\u4e0e\u8868\u9501<\/strong><a href=\"https:\/\/golangstar.cn\/backend_series\/advanced_interview\/database_lock.html#_1-4-\u884c\u9501\u4e0e\u8868\u9501\"><\/a><\/p>\n\n\n\n<p>\u884c\u9501\u4e0e\u8868\u9501\u662f\u6839\u636e\u9501\u5b9a\u7684<strong>\u8303\u56f4\uff08\u7c92\u5ea6\uff09<\/strong>\u6765\u5212\u5206\u7684\u3002\u987e\u540d\u601d\u4e49\uff0c\u884c\u9501\u9501\u4f4f\u7684\u662f\u6570\u636e\u884c\uff0c\u53ef\u80fd\u662f\u4e00\u884c\uff0c\u4e5f\u53ef\u80fd\u662f\u591a\u884c\u3002\u800c\u8868\u9501\u5219\u76f4\u63a5\u5c06\u6574\u5f20\u6570\u636e\u8868\u9501\u5b9a\u3002<\/p>\n\n\n\n<p>\u5728MySQL\u4e2d\uff0cInnoDB\u5b58\u50a8\u5f15\u64ce\u540c\u65f6\u652f\u6301\u884c\u9501\u548c\u8868\u9501\u3002\u4f46\u5fc5\u987b\u518d\u6b21\u5f3a\u8c03\uff0c<strong>\u884c\u9501\u7684\u5b9e\u73b0\u5f3a\u4f9d\u8d56\u4e8e\u7d22\u5f15<\/strong>\u3002\u5982\u679c\u4f60\u7684\u67e5\u8be2\u65e0\u6cd5\u547d\u4e2d\u4efb\u4f55\u7d22\u5f15\uff0c\u5bfc\u81f4\u5168\u8868\u626b\u63cf\uff0c\u90a3\u4e48InnoDB\u5c06\u65e0\u6cd5\u4f7f\u7528\u884c\u9501\uff0c\u53ea\u80fd\u9000\u800c\u6c42\u5176\u6b21\uff0c\u4f7f\u7528\u8868\u9501\u3002\u5f53\u7136\uff0c\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662f\u4e00\u4e9b\u8f83\u8001\u7684\u5b58\u50a8\u5f15\u64ce\uff0c\u5982MyISAM\uff0c\u90a3\u4e48\u5b83\u4ece\u8bbe\u8ba1\u4e0a\u5c31\u53ea\u652f\u6301\u8868\u9501\u3002<\/p>\n\n\n\n<p>1.5 <strong>\u5171\u4eab\u9501\u4e0e\u6392\u5b83\u9501<\/strong><\/p>\n\n\n\n<p>\u5171\u4eab\u9501\u548c\u6392\u5b83\u9501\u662f\u4ece<strong>\u4e92\u65a5\u6027<\/strong>\u7684\u89d2\u5ea6\u6765\u770b\u5f85\u9501\u7684\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u5171\u4eab\u9501 (Shared Lock, S\u9501)<\/strong>\uff1a\u4e5f\u79f0\u8bfb\u9501\u3002\u4e00\u4e2a\u4e8b\u52a1\u5bf9\u67d0\u884c\u6570\u636e\u52a0\u4e0aS\u9501\u540e\uff0c\u5176\u4ed6\u4e8b\u52a1\u4ecd\u7136\u53ef\u4ee5\u7ee7\u7eed\u5bf9\u8be5\u884c\u52a0S\u9501\uff0c\u4f46\u4e0d\u80fd\u52a0\u6392\u5b83\u9501\uff08X\u9501\uff09\u3002\u5b83\u5141\u8bb8\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u8bfb\u53d6\u540c\u4e00\u4efd\u6570\u636e\u3002<\/li>\n\n\n\n<li><strong>\u6392\u5b83\u9501 (Exclusive Lock, X\u9501)<\/strong>\uff1a\u4e5f\u79f0\u5199\u9501\u3002\u4e00\u4e2a\u4e8b\u52a1\u5bf9\u67d0\u884c\u6570\u636e\u52a0\u4e0aX\u9501\u540e\uff0c\u5176\u4ed6\u4efb\u4f55\u4e8b\u52a1\u90fd\u4e0d\u80fd\u518d\u5bf9\u8be5\u884c\u52a0\u4efb\u4f55\u7c7b\u578b\u7684\u9501\uff08\u65e0\u8bba\u662fS\u9501\u8fd8\u662fX\u9501\uff09\uff0c\u76f4\u5230\u6301\u6709\u9501\u7684\u4e8b\u52a1\u91ca\u653e\u3002\u5b83\u4fdd\u8bc1\u4e86\u5728\u4efb\u4f55\u65f6\u523b\uff0c\u53ea\u6709\u4e00\u4e2a\u4e8b\u52a1\u80fd\u4fee\u6539\u6570\u636e\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>1.6 \u610f\u5411\u9501<a href=\"https:\/\/golangstar.cn\/backend_series\/advanced_interview\/database_lock.html#_1-6-\u610f\u5411\u9501\"><\/a><\/strong><\/p>\n\n\n\n<p>\u610f\u5411\u9501\u662f\u4e00\u79cd<strong>\u8868\u7ea7\u9501<\/strong>\uff0c\u4f46\u5b83\u672c\u8eab\u5e76\u4e0d\u771f\u6b63\u9501\u5b9a\u6570\u636e\uff0c\u66f4\u50cf\u662f\u4e00\u4e2a&#8221;\u4fe1\u53f7&#8221;\u6216&#8221;\u6807\u5fd7&#8221;\u3002\u5b83\u7684\u6838\u5fc3\u4f5c\u7528\u662f\u544a\u8bc9\u5176\u4ed6\u4e8b\u52a1\uff1a&#8221;\u6211\uff08\u67d0\u4e2a\u4e8b\u52a1\uff09\u6b63\u51c6\u5907\u6216\u5df2\u7ecf\u5bf9\u8fd9\u4e2a\u8868\u91cc\u7684\u67d0\u4e9b\u884c\u52a0\u9501\u4e86&#8221;\u3002<\/p>\n\n\n\n<p>\u610f\u5411\u9501\u4e0e\u5171\u4eab\u9501\u3001\u6392\u5b83\u9501\u7ed3\u5408\uff0c\u5c31\u4ea7\u751f\u4e86\u4e24\u79cd\u610f\u5411\u9501\uff1a<\/p>\n\n\n\n<ul>\n<li><strong>\u610f\u5411\u5171\u4eab\u9501 (Intention Shared Lock, IS\u9501)<\/strong>\uff1a\u8868\u793a\u4e00\u4e2a\u4e8b\u52a1\u5e0c\u671b\u83b7\u5f97\u8868\u4e2d\u67d0\u4e9b\u884c\u7684\u5171\u4eab\u9501\u3002<\/li>\n\n\n\n<li><strong>\u610f\u5411\u6392\u5b83\u9501 (Intention Exclusive Lock, IX\u9501)<\/strong>\uff1a\u8868\u793a\u4e00\u4e2a\u4e8b\u52a1\u5e0c\u671b\u83b7\u5f97\u8868\u4e2d\u67d0\u4e9b\u884c\u7684\u6392\u5b83\u9501\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u6ce8\u610f\uff0c&#8221;\u610f\u5411&#8221;\u5f3a\u8c03\u7684\u662f\u4e00\u79cd\u6253\u7b97\uff0c\u4f46\u6700\u7ec8\u80fd\u5426\u6210\u529f\u83b7\u5f97\u884c\u9501\u662f\u4e0d\u786e\u5b9a\u7684\u3002<\/p>\n\n\n\n<p>\u5728MySQL\u4e2d\uff0c\u4f7f\u7528\u610f\u5411\u9501\u7684\u5178\u578b\u573a\u666f\u662f\u534f\u8c03\u884c\u9501\u548c\u8868\u9501\u7684\u5173\u7cfb\u3002\u5f53\u4e00\u4e2a\u4e8b\u52a1\u9700\u8981\u5bf9\u8868\u4e2d\u7684\u884c\u52a0S\u9501\u6216X\u9501\u65f6\uff0c\u5b83\u4f1a\u5148\u5728\u8868\u7ea7\u522b\u52a0\u4e0aIS\u9501\u6216IX\u9501\u3002\u4e4b\u540e\uff0c\u5982\u679c\u53e6\u4e00\u4e2a\u4e8b\u52a1\u60f3\u8981\u83b7\u53d6\u6574\u4e2a\u8868\u7684\u8868\u9501\uff08\u4f8b\u5982<code>LOCK TABLES ... WRITE<\/code>\uff09\uff0c\u5b83\u5c31\u65e0\u9700\u9010\u884c\u68c0\u67e5\u662f\u5426\u6709\u884c\u9501\u5b58\u5728\uff0c\u53ea\u9700\u68c0\u67e5\u8868\u7ea7\u522b\u662f\u5426\u5b58\u5728\u610f\u5411\u9501\u5373\u53ef\u3002\u8fd9\u6781\u5927\u5730\u63d0\u9ad8\u4e86\u6570\u636e\u5e93\u7684\u5e76\u53d1\u6027\u80fd\uff0c\u5e76\u907f\u514d\u4e86\u4e0d\u5fc5\u8981\u7684\u6b7b\u9501\u3002\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u5728\u4fee\u6539\u8868\u7ed3\u6784\uff08DDL\uff09\u65f6\uff0c\u4f1a\u963b\u585e\u6240\u6709\u589e\u5220\u6539\u67e5\uff08DML\uff09\u8bed\u53e5\u7684\u539f\u56e0\u3002<\/p>\n\n\n\n<p><strong>1.7 \u8bb0\u5f55\u9501\u3001\u95f4\u9699\u9501\u548c\u4e34\u952e\u9501\uff1a\u6df1\u5ea6\u5256\u6790<\/strong><\/p>\n\n\n\n<p>\u8fd9\u662f\u9762\u8bd5\u4e2d\u6700\u80fd\u68c0\u9a8c\u5019\u9009\u4eba\u6280\u672f\u6df1\u5ea6\u7684\u90e8\u5206\uff0c\u4e5f\u662f\u6700\u5bb9\u6613\u6df7\u6dc6\u7684\u6982\u5ff5\u3002\u53cd\u8fc7\u6765\u8bf4\uff0c\u5982\u679c\u4f60\u80fd\u5c06\u8fd9\u90e8\u5206\u7684\u7ec6\u8282\u9610\u8ff0\u6e05\u6670\uff0c\u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u975e\u5e38\u5927\u7684\u4eae\u70b9\u3002<\/p>\n\n\n\n<p><strong>1.7.1 \u8bb0\u5f55\u9501 (Record Lock)<\/strong><\/p>\n\n\n\n<p>\u8bb0\u5f55\u9501\u975e\u5e38\u76f4\u89c2\uff0c\u5b83\u9501\u5b9a\u7684\u662f<strong>\u67d0\u4e00\u6761\u7279\u5b9a\u7684\u7d22\u5f15\u8bb0\u5f55<\/strong>\u3002\u901a\u5e38\uff0c\u5f53\u4f60\u7684\u67e5\u8be2\u6761\u4ef6\u662f<strong>\u7b49\u503c\u67e5\u8be2<\/strong>\uff0c\u5e76\u4e14\u7cbe\u51c6\u5730\u547d\u4e2d\u4e86<strong>\u4e3b\u952e<\/strong>\u6216<strong>\u552f\u4e00\u7d22\u5f15<\/strong>\u65f6\uff0cInnoDB\u5c31\u4f1a\u4f7f\u7528\u8bb0\u5f55\u9501\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">-- \u5047\u8bbeid\u662f\u4e3b\u952e\uff0c\u8fd9\u6761\u8bed\u53e5\u4f1a\u5bf9id=310\u8fd9\u4e00\u6761\u8bb0\u5f55\u52a0\u4e0a\u8bb0\u5f55\u9501\nSELECT * FROM your_tab WHERE id = 310 FOR UPDATE;<\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"327\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-264-1024x327.png\" alt=\"\" class=\"wp-image-18991\" style=\"width:514px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-264-1024x327.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-264-300x96.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-264-768x245.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-264-1536x490.png 1536w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-264-830x265.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-264-230x73.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-264-350x112.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-264-480x153.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-264.png 1888w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u5982\u679c\u67e5\u8be2\u6761\u4ef6\u4f5c\u7528\u5728\u552f\u4e00\u7d22\u5f15\u4e0a\uff0c\u4e14\u80fd\u547d\u4e2d\u4e00\u6761\u8bb0\u5f55\uff0c\u6548\u679c\u662f\u5b8c\u5168\u4e00\u6837\u7684\u3002\u5047\u8bbe<code>email<\/code>\u5b57\u6bb5\u6709\u552f\u4e00\u7d22\u5f15\uff0c\u8fd9\u6761\u8bed\u53e5\u4e5f\u4f1a\u4f7f\u7528\u8bb0\u5f55\u9501<a href=\"https:\/\/golangstar.cn\/backend_series\/advanced_interview\/database_lock.html#_1-7-\u8bb0\u5f55\u9501\u3001\u95f4\u9699\u9501\u548c\u4e34\u952e\u9501-\u6df1\u5ea6\u5256\u6790\"><\/a><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">-- \u5047\u8bbeemail\u5b57\u6bb5\u6709\u552f\u4e00\u7d22\u5f15\uff0c\u8fd9\u6761\u8bed\u53e5\u4e5f\u4f1a\u4f7f\u7528\u8bb0\u5f55\u9501\nSELECT * FROM your_tab WHERE email='your_email' FOR UPDATE;<\/pre>\n\n\n\n<p>\u4f46\u662f\uff0c\u5982\u679c\u7b49\u503c\u67e5\u8be2\u6ca1\u6709\u547d\u4e2d\u4efb\u4f55\u8bb0\u5f55\uff0c\u90a3\u4e48\u5c31\u4e0d\u4f1a\u4f7f\u7528\u8bb0\u5f55\u9501\uff0c\u800c\u662f\u4f1a\u4f7f\u7528\u95f4\u9699\u9501\u3002\u6bd4\u5982\u6570\u636e\u5e93\u4e2d\u53ea\u6709 id \u4e3a\uff0810\uff0c40\uff0c70\uff09\u7684\u4e09\u6761\u8bb0\u5f55\uff0c\u4e5f\u5c31\u662f id= 30 \u8fd9\u4e2a\u6761\u4ef6\u6ca1\u6709\u547d\u4e2d\u4efb\u4f55\u6570\u636e\uff0c\u90a3\u4e48\u8fd9\u6761\u8bed\u53e5\u4f1a\u5728\uff0810\uff0c40\uff09\u52a0\u4e0a\u95f4\u9699\u9501\uff0c\u6ce8\u610f\uff0c\u8fd9\u91cc\u662f\u5bf9\u4e00\u4e2a\u5de6\u5f00\u53f3\u5f00\u7684\u533a\u95f4\u52a0\u9501\u3002\u53ef\u4ee5\u770b\u5230\uff0c \u5373\u4fbf\u662f\u662f\u5bf9\u5b57\u6bb5\u52a0\u4e86\u552f\u4e00\u7d22\u5f15\uff0c\u4f46\u662f\u5982\u679c\u67e5\u8be2\u6ca1\u6709\u547d\u4e2d\u7d22\u5f15\uff0c\u5bf9\u6027\u80fd\u5f71\u54cd\u4e5f\u662f\u5f88\u5927\u7684\u3002<\/p>\n\n\n\n<p><strong>1.7.2 \u95f4\u9699\u9501 (Gap Lock)<\/strong><\/p>\n\n\n\n<p>\u95f4\u9699\u9501\u9501\u5b9a\u7684\u662f\u4e00\u4e2a<strong>\u5f00\u533a\u95f4\u8303\u56f4<\/strong>\uff0c\u5373\u4e24\u6761\u7d22\u5f15\u8bb0\u5f55\u4e4b\u95f4\u7684&#8221;\u7a7a\u9699&#8221;\uff0c\u4f46\u5b83\u4e0d\u5305\u62ec\u8bb0\u5f55\u672c\u8eab\u3002\u5b83\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u5728\u53ef\u91cd\u590d\u8bfb\u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u5728\u8fd9\u4e2a&#8221;\u95f4\u9699&#8221;\u4e2d\u63d2\u5165\u65b0\u7684\u8bb0\u5f55\uff0c\u4ece\u800c\u907f\u514d&#8221;\u5e7b\u8bfb&#8221;\u95ee\u9898\u3002\u901a\u5e38\uff0c\u8303\u56f4\u67e5\u8be2\uff08\u5982<code>&lt;<\/code>\u3001<code>&lt;=<\/code>\u3001<code>BETWEEN<\/code>\uff09\u4f1a\u4f7f\u7528\u5230\u95f4\u9699\u9501\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">-- \u8fd9\u6761\u8bed\u53e5\u4f1a\u9501\u4f4f(500, 1000)\u8fd9\u4e2a\u5f00\u533a\u95f4\nSELECT * FROM your_tab WHERE id BETWEEN 500 AND 1000 FOR UPDATE;<\/pre>\n\n\n\n<p>\u95f4\u9699\u9501\u4f1a\u9501\u4f4f(500, 1000)\u4e4b\u95f4\u7684\u6570\u636e\uff0c\u800c500\u548c1000\u8fd9\u4e24\u6761\u8bb0\u5f55\u672c\u8eab\u5219\u4f1a\u88ab\u8bb0\u5f55\u9501\u9501\u4f4f\u3002\u5982\u679c\u4f60\u7684\u8868\u4e2d\u6ca1\u6709id=500\u7684\u8bb0\u5f55\uff0c\u6570\u636e\u5e93\u4f1a\u4e00\u76f4\u5411\u5de6\u627e\u5230\u7b2c\u4e00\u4e2a\u5b58\u5728\u7684\u6570\u636e\uff08\u6bd4\u5982400\uff09\uff1b\u5982\u679c\u6ca1\u6709id=100\u7684\u8bb0\u5f55\uff0c\u5219\u4f1a\u4e00\u76f4\u5411\u53f3\u627e\u5230\u7b2c\u4e00\u4e2a\u5b58\u5728\u7684\u6570\u636e\uff08\u6bd4\u59821200\uff09\u3002\u90a3\u4e48\u6b64\u65f6\u4f7f\u7528\u7684\u95f4\u9699\u9501\u8303\u56f4\u5c31\u662f(400, 1200)\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u6709\u4eba\u60f3\u63d2\u5165\u4e00\u6761\u4e3b\u952e\u4e3a700\u7684\u884c\uff0c\u64cd\u4f5c\u5c31\u4f1a\u88ab\u963b\u585e\u3002<\/p>\n\n\n\n<p>\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u7279\u6027\u662f\uff1a<strong>\u95f4\u9699\u9501\u548c\u95f4\u9699\u9501\u4e4b\u95f4\u662f\u4e0d\u6392\u5b83\u7684<\/strong>\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e24\u4e2a\u4e0d\u540c\u7684\u4e8b\u52a1\uff0c\u5373\u4f7f\u5b83\u4eec\u7533\u8bf7\u7684\u95f4\u9699\u9501\u8303\u56f4\u6709\u91cd\u53e0\uff0c\u4e5f\u53ef\u4ee5\u540c\u65f6\u52a0\u9501\u6210\u529f\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"450\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-265-1024x450.png\" alt=\"\" class=\"wp-image-18992\" style=\"width:512px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-265-1024x450.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-265-300x132.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-265-768x337.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-265-1536x674.png 1536w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-265-830x364.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-265-230x101.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-265-350x154.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-265-480x211.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-265.png 1886w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p><strong>1.7.3 \u4e34\u952e\u9501 (Next-Key Lock)<\/strong><a href=\"https:\/\/golangstar.cn\/backend_series\/advanced_interview\/database_lock.html#_1-7-2-\u95f4\u9699\u9501-gap-lock\"><\/a><\/p>\n\n\n\n<p>\u4e34\u952e\u9501\u662fInnoDB\u5728\u53ef\u91cd\u590d\u8bfb\u9694\u79bb\u7ea7\u522b\u4e0b\u9ed8\u8ba4\u7684\u9501\u5b9a\u7b97\u6cd5\u3002\u4ece\u76f4\u89c2\u4e0a\uff0c\u4f60\u53ef\u4ee5\u628a\u5b83\u770b\u4f5c\u662f<strong>\u4e00\u4e2a\u8bb0\u5f55\u9501\u548c\u4e00\u4e2a\u95f4\u9699\u9501\u7684\u7ec4\u5408<\/strong>\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e34\u952e\u9501\u4e0d\u4ec5\u4f1a\u7528\u8bb0\u5f55\u9501\u9501\u4f4f\u547d\u4e2d\u7684\u8bb0\u5f55\uff0c\u8fd8\u4f1a\u7528\u95f4\u9699\u9501\u9501\u4f4f\u8be5\u8bb0\u5f55\u4e4b\u524d\u7684\u90a3\u4e2a\u7a7a\u9699\u3002\u4e34\u952e\u9501\u7684\u9501\u5b9a\u533a\u95f4\u662f\u4e00\u4e2a<strong>\u5de6\u5f00\u53f3\u95ed<\/strong>\u7684\u533a\u95f4\u3002<\/p>\n\n\n\n<p>\u8fd8\u662f\u7528\u524d\u9762\u7684\u4f8b\u5b50\uff0c\u5982\u679c\u7d22\u5f15\u4e2d\u53ea\u6709(10, 40, 70)\u4e09\u6761\u8bb0\u5f55\uff0c\u90a3\u4e48\u4e00\u4e2a\u4e34\u952e\u9501\u5c31\u53ef\u4ee5\u5c06(10, 40]\u8fd9\u4e2a\u533a\u95f4\u9501\u4f4f\u3002\u4e34\u952e\u9501\u4e0e\u6570\u636e\u5e93\u7684\u9694\u79bb\u7ea7\u522b\u8054\u7cfb\u6700\u4e3a\u7d27\u5bc6\uff0c\u5b83\u6b63\u662f\u89e3\u51b3\u5e7b\u8bfb\u95ee\u9898\u7684\u5173\u952e\u6240\u5728\u3002<\/p>\n\n\n\n<p><strong>1.7.4 \u52a0\u9501\u89c4\u5219\u603b\u7ed3<\/strong><\/p>\n\n\n\n<p>\u4e3a\u4e86\u66f4\u6e05\u6670\u5730\u7406\u89e3\u8fd9\u4e09\u79cd\u9501\u7684\u9002\u7528\u573a\u666f\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5176\u603b\u7ed3\u4e3a\u4e00\u5957\u5224\u65ad\u6cd5\u5219\u3002\u8fd9\u5957\u6cd5\u5219\u7684\u6838\u5fc3\u5728\u4e8e\u7406\u89e3\u4e34\u952e\u9501\u4f5c\u4e3a\u9ed8\u8ba4\u884c\u4e3a\uff0c\u4ee5\u53ca\u5b83\u5728\u7279\u5b9a\u6761\u4ef6\u4e0b\u7684&#8221;\u9000\u5316&#8221;\u73b0\u8c61\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u57fa\u7840\u539f\u5219\uff1a\u9ed8\u8ba4\u4f7f\u7528\u4e34\u952e\u9501<\/strong> \u5728\u53ef\u91cd\u590d\u8bfb\uff08RR\uff09\u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u4e34\u952e\u9501\u662fInnoDB\u7684\u57fa\u77f3\u548c\u9ed8\u8ba4\u9009\u62e9\u3002\u65e0\u8bba\u662f\u7b49\u503c\u67e5\u8be2\u8fd8\u662f\u8303\u56f4\u67e5\u8be2\uff0cInnoDB\u9996\u5148\u503e\u5411\u4e8e\u4f7f\u7528\u4e34\u952e\u9501\u6765\u9501\u5b9a\u76f8\u5173\u8bb0\u5f55\u53ca\u5176\u524d\u65b9\u7684\u95f4\u9699\uff0c\u4ee5\u6b64\u6765\u675c\u7edd\u5e7b\u8bfb\u7684\u53ef\u80fd\u3002<\/li>\n\n\n\n<li><strong>\u4f18\u5316\u7279\u4f8b\uff1a\u9000\u5316\u4e3a\u8bb0\u5f55\u9501<\/strong> \u5f53\u67e5\u8be2\u80fd\u591f\u5b9e\u73b0\u6700\u7cbe\u51c6\u7684\u5b9a\u4f4d\u65f6\uff0c\u4e34\u952e\u9501\u4f1a\u8fdb\u884c\u4f18\u5316\uff0c\u9000\u5316\u4e3a\u7c92\u5ea6\u66f4\u7ec6\u7684\u8bb0\u5f55\u9501\u3002\u8fd9\u4e2a\u7279\u4f8b\u7684\u89e6\u53d1\u6761\u4ef6\u975e\u5e38\u4e25\u683c\uff1a\n<ul>\n<li>\u67e5\u8be2\u6761\u4ef6\u5fc5\u987b\u662f<strong>\u7b49\u503c\u67e5\u8be2<\/strong>\uff08\u5982 <code>id = ?<\/code> \u6216 <code>email = ?<\/code>\uff09\u3002<\/li>\n\n\n\n<li>\u67e5\u8be2\u7684\u5217\u5fc5\u987b\u662f<strong>\u4e3b\u952e<\/strong>\u6216<strong>\u552f\u4e00\u7d22\u5f15<\/strong>\u3002<\/li>\n\n\n\n<li>\u67e5\u8be2\u7ed3\u679c\u5fc5\u987b<strong>\u7cbe\u786e\u547d\u4e2d<\/strong>\u4e00\u6761\u5b58\u5728\u7684\u8bb0\u5f55\u3002 \u53ea\u6709\u540c\u65f6\u6ee1\u8db3\u8fd9\u4e09\u4e2a\u6761\u4ef6\uff0cInnoDB\u624d\u4f1a\u653e\u5f03\u5bf9\u95f4\u9699\u7684\u9501\u5b9a\uff0c\u53ea\u5bf9\u8be5\u6761\u8bb0\u5f55\u52a0\u8bb0\u5f55\u9501\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u53e6\u4e00\u7279\u4f8b\uff1a\u9000\u5316\u4e3a\u95f4\u9699\u9501<\/strong> \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e34\u952e\u9501\u4e2d&#8221;\u9501\u5b9a\u8bb0\u5f55&#8221;\u7684\u90e8\u5206\u4f1a\u6d88\u5931\uff0c\u4f7f\u5176\u9000\u5316\u4e3a\u7eaf\u7cb9\u7684\u95f4\u9699\u9501\u3002\u8fd9\u901a\u5e38\u53d1\u751f\u5728\uff1a\n<ul>\n<li>\u67e5\u8be2\u7684\u8303\u56f4\u4e0d\u5305\u542b\u4efb\u4f55\u5b58\u5728\u7684\u8bb0\u5f55\uff0c\u4f8b\u5982 <code>WHERE id > 100<\/code>\uff08\u5047\u8bbe100\u662f\u6700\u5927ID\uff09\u3002<\/li>\n\n\n\n<li>\u67e5\u8be2\u4e00\u4e2a\u5728\u7d22\u5f15\u4e2d\u4e0d\u5b58\u5728\u7684\u503c\uff0c\u4f8b\u5982 <code>WHERE id = 15<\/code>\uff08\u5047\u8bbe12\u548c17\u662f\u76f8\u90bb\u8bb0\u5f55\uff09\u3002 \u5728\u8fd9\u4e9b\u573a\u666f\u4e0b\uff0c\u7531\u4e8e\u6ca1\u6709\u5177\u4f53\u7684&#8221;\u8bb0\u5f55&#8221;\u53ef\u9501\uff0c\u9501\u5b9a\u7684\u91cd\u70b9\u5c31\u5b8c\u5168\u843d\u5728\u4e86\u9632\u6b62\u65b0\u6570\u636e\u63d2\u5165\u7684&#8221;\u95f4\u9699&#8221;\u4e0a\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-266-1024x512.png\" alt=\"\" class=\"wp-image-18993\" style=\"width:520px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-266-1024x512.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-266-300x150.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-266-768x384.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-266-1536x768.png 1536w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-266-830x415.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-266-230x115.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-266-350x175.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-266-480x240.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-266.png 1880w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5bf9\u4e8e\u666e\u901a\u7d22\u5f15\uff0c\u5373\u4f7f\u662f\u7b49\u503c\u67e5\u8be2\uff0c\u56e0\u4e3a\u7d22\u5f15\u503c\u53ef\u80fd\u91cd\u590d\uff0cInnoDB\u4e3a\u4e86\u9632\u6b62\u5e7b\u8bfb\uff0c\u4ecd\u7136\u4f1a\u4f7f\u7528\u4e34\u952e\u9501\uff0c\u800c\u4e0d\u662f\u9000\u5316\u4e3a\u8bb0\u5f55\u9501\u3002<a href=\"https:\/\/golangstar.cn\/backend_series\/advanced_interview\/database_lock.html#_1-7-4-\u52a0\u9501\u89c4\u5219\u603b\u7ed3\"><\/a><\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>2. \u9762\u8bd5\u5b9e\u6218\u6307\u5357<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>2.1 \u6253\u9020\u4f60\u7684\u5b9e\u6218\u77e5\u8bc6\u5e93<\/strong><\/p>\n\n\n\n<p>\u8981\u5728\u9762\u8bd5\u4e2d\u8131\u9896\u800c\u51fa\uff0c\u4ec5\u6709\u7406\u8bba\u77e5\u8bc6\u662f\u8fdc\u8fdc\u4e0d\u591f\u7684\u3002\u9762\u8bd5\u5b98\u66f4\u770b\u91cd\u4f60\u89e3\u51b3\u5b9e\u9645\u95ee\u9898\u7684\u80fd\u529b\u3002\u56e0\u6b64\uff0c\u4f60\u9700\u8981\u4e3b\u52a8\u6784\u5efa\u4e00\u4e2a\u5c5e\u4e8e\u81ea\u5df1\u7684\u5b9e\u6218\u6848\u4f8b\u5e93\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u590d\u76d8\u7ebf\u4e0a\u95ee\u9898<\/strong>\uff1a\u4e3b\u52a8\u53bb\u4e86\u89e3\u548c\u590d\u76d8\u516c\u53f8\u53d1\u751f\u8fc7\u7684\u4e0e\u9501\u76f8\u5173\u7684\u7ebf\u4e0a\u6545\u969c\uff0c\u7279\u522b\u662f\u90a3\u4e9b\u5bfc\u81f4\u670d\u52a1\u6296\u52a8\u6216\u4e2d\u65ad\u7684\u6b7b\u9501\u6848\u4f8b\u3002\u4f60\u9700\u8981\u641e\u6e05\u695a\u95ee\u9898\u7684\u5168\u8c8c\uff1a\u5b83\u662f\u5728\u4ec0\u4e48\u4e1a\u52a1\u573a\u666f\u4e0b\u89e6\u53d1\u7684\uff1f\u6392\u67e5\u8fc7\u7a0b\u662f\u600e\u6837\u7684\uff1f\u6700\u7ec8\u662f\u5982\u4f55\u89e3\u51b3\u7684\uff1f\u6709\u6ca1\u6709\u7559\u4e0b\u4ec0\u4e48\u9690\u60a3\uff1f<\/li>\n\n\n\n<li><strong>\u6316\u6398\u6027\u80fd\u74f6\u9888<\/strong>\uff1a\u5ba1\u89c6\u4f60\u8d1f\u8d23\u7684\u4e1a\u52a1\uff0c\u601d\u8003\u662f\u5426\u5b58\u5728\u56e0\u4e3a\u9501\u4f7f\u7528\u4e0d\u5f53\u800c\u5bfc\u81f4\u7684\u6027\u80fd\u95ee\u9898\u3002\u6bd4\u5982\uff0c\u67d0\u4e2a\u6838\u5fc3\u63a5\u53e3\u7684\u54cd\u5e94\u65f6\u95f4\uff08RT\uff09\u5f88\u9ad8\uff0c\u6709\u6ca1\u6709\u53ef\u80fd\u662f\u56e0\u4e3a\u67d0\u4e2a\u4e8b\u52a1\u6301\u6709\u4e86\u8fc7\u5927\u7684\u9501\uff08\u5982\u8868\u9501\uff09\u6216\u8005\u9501\u7684\u6301\u6709\u65f6\u95f4\u8fc7\u957f\uff1f<\/li>\n\n\n\n<li><strong>\u89e3\u6784\u9501\u7684\u5e94\u7528\u6a21\u5f0f<\/strong>\uff1a\u5728\u516c\u53f8\u7684\u4ee3\u7801\u5e93\u4e2d\uff0c\u4e3b\u52a8\u53bb\u5bfb\u627e\u548c\u5206\u6790\u4e50\u89c2\u9501\u4e0e\u60b2\u89c2\u9501\u7684\u5b9e\u9645\u5e94\u7528\u3002\u5bf9\u4e8e\u4e50\u89c2\u9501\uff0c\u5b83\u7684CAS\u64cd\u4f5c\u5177\u4f53\u662f\u5982\u4f55\u901a\u8fc7SQL\u5b9e\u73b0\u7684\uff1f\u7248\u672c\u53f7\u662f\u5982\u4f55\u7ba1\u7406\u7684\uff1f\u5bf9\u4e8e\u60b2\u89c2\u9501\uff0c<code>SELECT ... FOR UPDATE<\/code>\u7528\u5728\u54ea\u4e9b\u5173\u952e\u4e1a\u52a1\u4e0a\uff1f\u8fd9\u4e9b\u7528\u6cd5\u662f\u5426\u5408\u7406\uff1f\u6709\u6ca1\u6709\u4f18\u5316\u7684\u7a7a\u95f4\uff1f<\/li>\n<\/ul>\n\n\n\n<p>\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u5c06\u522b\u4eba\u7684\u7ecf\u9a8c\u548c\u7ebf\u4e0a\u7684\u6559\u8bad\u5185\u5316\u4e3a\u81ea\u5df1\u7684\u77e5\u8bc6\uff0c\u4f60\u624d\u80fd\u5728\u9762\u8bd5\u4e2d\u8a00\u4e4b\u6709\u7269\u3002\u540c\u65f6\uff0c\u4f60\u9700\u8981\u523b\u610f\u8bad\u7ec3\u81ea\u5df1\u5206\u6790SQL\u52a0\u9501\u884c\u4e3a\u7684\u80fd\u529b\uff0c\u62ff\u5230\u4e00\u6761SQL\u548c\u8868\u7ed3\u6784\uff0c\u5c31\u80fd\u5927\u81f4\u63a8\u65ad\u51fa\u5b83\u5728\u7279\u5b9a\u9694\u79bb\u7ea7\u522b\u4e0b\u4f1a\u52a0\u4ec0\u4e48\u9501\uff0c\u5f71\u54cd\u8303\u56f4\u6709\u591a\u5927\uff0c\u8fd9\u4f1a\u8ba9\u4f60\u663e\u5f97\u975e\u5e38\u4e13\u4e1a\u3002<\/p>\n\n\n\n<p><strong>2.2 \u7ed3\u6784\u5316\u5e94\u7b54\u7b56\u7565<\/strong><\/p>\n\n\n\n<p>\u5f53\u9762\u8bd5\u5b98\u629b\u51fa&#8221;\u8c08\u8c08\u4f60\u5bf9MySQL\u9501\u7684\u7406\u89e3&#8221;\u8fd9\u7c7b\u5b8f\u89c2\u95ee\u9898\u65f6\uff0c\u4f60\u7684\u56de\u7b54\u9700\u8981\u6709\u5c42\u6b21\u611f\uff0c\u5148\u642d\u5efa\u6846\u67b6\uff0c\u518d\u586b\u5145\u7ec6\u8282\u3002<\/p>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u8fd9\u6837\u5f00\u573a\uff0c\u5148\u7ed9\u51fa\u4e00\u4e2a\u5168\u5c40\u89c6\u56fe\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\"\u597d\u7684\u3002\u5bf9\u4e8eMySQL\u7684\u9501\uff0c\u6211\u4e60\u60ef\u4ece\u51e0\u4e2a\u4e0d\u540c\u7684\u7ef4\u5ea6\u53bb\u7406\u89e3\u5b83\u3002\u9996\u5148\uff0c\u4ece\u9501\u5b9a\u7c92\u5ea6\u4e0a\uff0c\u6709\u6211\u4eec\u719f\u77e5\u7684\u884c\u9501\u548c\u8868\u9501\u3002\u5176\u6b21\uff0c\u4ece\u9501\u7684\u517c\u5bb9\u6027\u4e0a\uff0c\u53ef\u4ee5\u5206\u4e3a\u5171\u4eab\u9501\uff08S\u9501\uff09\u548c\u6392\u5b83\u9501\uff08X\u9501\uff09\uff0c\u8fd9\u51b3\u5b9a\u4e86\u5b83\u4eec\u662f\u5426\u53ef\u4ee5\u5171\u5b58\u3002<br>\u5728\u8fd9\u4e24\u4e2a\u57fa\u7840\u7ef4\u5ea6\u4e4b\u4e0a\uff0cInnoDB\u4e3a\u4e86\u63d0\u5347\u6027\u80fd\uff0c\u8fd8\u5f15\u5165\u4e86\u610f\u5411\u9501\uff0c\u5b83\u662f\u4e00\u79cd\u8868\u7ea7\u9501\uff0c\u7528\u6765\u9884\u793a\u4e8b\u52a1\u63a5\u4e0b\u6765\u60f3\u8981\u52a0\u7684\u884c\u9501\u7c7b\u578b\u3002<br>\u800c\u5728InnoDB\u7684\u884c\u9501\u5b9e\u73b0\u4e2d\uff0c\u53c8\u6709\u4e09\u79cd\u5177\u4f53\u7684\u9501\u7b97\u6cd5\uff0c\u8fd9\u4e5f\u662f\u9762\u8bd5\u4e2d\u7684\u91cd\u70b9\uff1a\u8bb0\u5f55\u9501\u3001\u95f4\u9699\u9501\u548c\u4e34\u952e\u9501\u3002\u5b83\u4eec\u662fInnoDB\u5728RR\u7ea7\u522b\u4e0b\u89e3\u51b3\u5e7b\u8bfb\u95ee\u9898\u7684\u6838\u5fc3\u3002<br>\u6700\u540e\uff0c\u4ece\u7f16\u7a0b\u601d\u60f3\u7684\u5c42\u9762\uff0c\u6211\u4eec\u8fd8\u6709\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u7684\u6982\u5ff5\uff0c\u5b83\u4eec\u662f\u6211\u4eec\u5728\u5e94\u7528\u5c42\u8fdb\u884c\u5e76\u53d1\u63a7\u5236\u7684\u4e24\u79cd\u4e0d\u540c\u7b56\u7565\u3002\"<\/pre>\n\n\n\n<p>\u5728\u6784\u5efa\u4e86\u6574\u4f53\u8ba4\u77e5\u6846\u67b6\u540e\uff0c\u518d\u629b\u51fa\u9501\u673a\u5236\u7684\u4e24\u4e2a\u6838\u5fc3\u652f\u67f1\uff1a<a href=\"https:\/\/golangstar.cn\/backend_series\/advanced_interview\/database_lock.html#_2-2-\u7ed3\u6784\u5316\u5e94\u7b54\u7b56\u7565\"><\/a><\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\"\u8981\u6df1\u5165\u7406\u89e3InnoDB\u7684\u9501\uff0c\u5173\u952e\u5728\u4e8e\u6293\u4f4f\u4e24\u4e2a\u6838\u5fc3\uff1a\u7d22\u5f15\u548c\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u3002InnoDB\u7684\u884c\u9501\u662f\u6784\u5efa\u5728\u7d22\u5f15\u4e4b\u4e0a\u7684\uff0c\u6ca1\u6709\u7d22\u5f15\uff0c\u884c\u9501\u5c31\u65e0\u4ece\u8c08\u8d77\uff0c\u53ea\u80fd\u9000\u5316\u4e3a\u8868\u9501\u3002\u800c\u50cf\u4e34\u952e\u9501\u548c\u95f4\u9699\u9501\u8fd9\u7c7b\u7cbe\u7ec6\u7684\u9501\u5b9a\u7b56\u7565\uff0c\u5176\u4e3b\u8981\u821e\u53f0\u662f\u5728\u53ef\u91cd\u590d\u8bfb\uff08RR\uff09\u8fd9\u4e2a\u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u5176\u6839\u672c\u76ee\u7684\u662f\u4e3a\u4e86\u89e3\u51b3\u5e7b\u8bfb\u95ee\u9898\u3002\"<\/pre>\n\n\n\n<p>\u8fd9\u6837\u7684\u56de\u7b54\u65b9\u5f0f\uff0c\u5148\u5c55\u73b0\u4e86\u4f60\u77e5\u8bc6\u7684\u5e7f\u5ea6\u548c\u4f53\u7cfb\u6027\uff0c\u7136\u540e\u70b9\u51fa\u4e86\u95ee\u9898\u7684\u672c\u8d28\uff0c\u81ea\u7136\u4f1a\u5f15\u5bfc\u9762\u8bd5\u5b98\u5bf9\u4f60\u611f\u5174\u8da3\u7684\u6df1\u5c42\u90e8\u5206\u8fdb\u884c\u8ffd\u95ee\uff0c\u6bd4\u5982\uff1a<\/p>\n\n\n\n<ul>\n<li>&#8220;\u4f60\u521a\u624d\u63d0\u5230\u7684\u4e34\u952e\u9501\uff0c\u80fd\u8be6\u7ec6\u8bb2\u8bb2\u5b83\u7684\u5de5\u4f5c\u539f\u7406\u548c\u4f7f\u7528\u573a\u666f\u5417\uff1f&#8221;<\/li>\n\n\n\n<li>&#8220;\u65e2\u7136RR\u7ea7\u522b\u6709\u4e34\u952e\u9501\u53ef\u4ee5\u9632\u6b62\u5e7b\u8bfb\uff0c\u90a3\u5b83\u5728\u4ec0\u4e48\u6781\u7aef\u60c5\u51b5\u4e0b\u8fd8\u4f1a\u51fa\u73b0\u5e7b\u8bfb\u5462\uff1f&#8221;<\/li>\n\n\n\n<li>&#8220;\u4f60\u5728\u9879\u76ee\u4e2d\u662f\u5982\u4f55\u9009\u62e9\u4f7f\u7528\u4e50\u89c2\u9501\u8fd8\u662f\u60b2\u89c2\u9501\u7684\uff1f\u80fd\u4e3e\u4e2a\u4f8b\u5b50\u5417\uff1f&#8221;<\/li>\n\n\n\n<li>&#8220;\u542c\u8d77\u6765\u4f60\u5bf9\u9501\u7814\u7a76\u5f97\u6bd4\u8f83\u6df1\uff0c\u6709\u6ca1\u6709\u5904\u7406\u8fc7\u7ebf\u4e0a\u6b7b\u9501\u95ee\u9898\u7684\u7ecf\u9a8c\uff1f&#8221;<\/li>\n<\/ul>\n\n\n\n<p>\u5f53\u9762\u8bd5\u5b98\u5f00\u59cb\u8ffd\u95ee\u8fd9\u4e9b\u7ec6\u8282\u65f6\uff0c\u4f60\u5c31\u6210\u529f\u5730\u5c06\u9762\u8bd5\u7684\u4e3b\u52a8\u6743\u638c\u63e1\u5728\u4e86\u81ea\u5df1\u624b\u4e2d\uff0c\u63a5\u4e0b\u6765\u5c31\u662f\u4f60\u5c55\u793a\u9879\u76ee\u7ecf\u9a8c\u548c\u6280\u672f\u6df1\u5ea6\u7684\u6700\u4f73\u65f6\u673a\u3002<\/p>\n\n\n\n<p><strong>2.3 \u9762\u8bd5\u4eae\u70b9\u65b9\u6848<\/strong><\/p>\n\n\n\n<p><strong>2.3.1 \u57fa\u7840\u4f18\u5316\uff1a\u4e3a\u9ad8\u9891\u67e5\u8be2\u6dfb\u52a0\u7d22\u5f15<\/strong><\/p>\n\n\n\n<p>\u8fd9\u662f\u4e00\u4e2a\u57fa\u7840\u5374\u975e\u5e38\u6709\u6548\u7684\u4f18\u5316\uff0c\u4f60\u53ef\u4ee5\u628a\u5b83\u4f5c\u4e3a\u4e00\u4e2a&#8221;\u6392\u67e5\u7ebf\u4e0a\u6027\u80fd\u6296\u52a8&#8221;\u7684\u6545\u4e8b\u6765\u8bb2\u8ff0\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\"\u6211\u66fe\u7ecf\u5904\u7406\u8fc7\u4e00\u4e2a\u7ebf\u4e0a\u95ee\u9898\uff0c\u67d0\u4e2a\u6838\u5fc3\u670d\u52a1\u7684\u6027\u80fd\u4f1a\u5468\u671f\u6027\u5730\u51fa\u73b0\u6bdb\u523a\uff0c\u54cd\u5e94\u65f6\u95f4\u7a81\u7136\u98d9\u5347\u3002\u7ecf\u8fc7\u4e00\u7cfb\u5217\u6392\u67e5\uff0c\u6211\u4eec\u5b9a\u4f4d\u5230\u74f6\u9888\u5728\u4e8e\u6570\u636e\u5e93\u3002\u4f46\u5947\u602a\u7684\u662f\uff0c\u901a\u8fc7\u6162\u67e5\u8be2\u65e5\u5fd7\u6293\u5230\u7684SQL\uff0c\u5355\u72ec\u6267\u884c\u65f6\u901f\u5ea6\u5f88\u5feb\uff0c\u5e76\u4e14EXPLAIN\u5206\u6790\u4e5f\u663e\u793a\u5b83\u547d\u4e2d\u4e86\u7d22\u5f15\u3002<br><br>\u540e\u6765\uff0c\u6211\u4eec\u901a\u8fc7SHOW PROCESSLIST\u548c\u6570\u636e\u5e93\u76d1\u63a7\uff0c\u624d\u53d1\u73b0\u5728\u6027\u80fd\u6296\u52a8\u7684\u65f6\u523b\uff0c\u6709\u5927\u91cf\u6b63\u5e38\u7684\u67e5\u8be2\u90fd\u963b\u585e\u5728Waiting for table metadata lock\u72b6\u6001\u3002\u6211\u4eec\u987a\u85e4\u6478\u74dc\uff0c\u6700\u7ec8\u53d1\u73b0\u6e90\u5934\u662f\u540e\u53f0\u4e00\u4e2a\u65b0\u529f\u80fd\u5f15\u5165\u7684\u62a5\u8868SQL\u3002\u8fd9\u6761SQL\u7684\u67e5\u8be2\u6761\u4ef6\u975e\u5e38\u590d\u6742\uff0c\u4e14\u6ca1\u6709\u5efa\u7acb\u5408\u9002\u7684\u7d22\u5f15\uff0c\u5bfc\u81f4\u5b83\u5728\u6267\u884c\u65f6\uff0cMySQL\u5bf9\u76ee\u6807\u8868\u65bd\u52a0\u4e86\u8868\u9501\u3002\u7531\u4e8e\u62a5\u8868\u67e5\u8be2\u6570\u636e\u91cf\u5927\uff0c\u6267\u884c\u65f6\u95f4\u957f\uff0c\u8fd9\u4e2a\u8868\u9501\u88ab\u957f\u65f6\u95f4\u6301\u6709\uff0c\u4ece\u800c\u963b\u585e\u4e86\u6240\u6709\u5176\u4ed6\u9488\u5bf9\u8be5\u8868\u7684\u6b63\u5e38\u4e1a\u52a1\u64cd\u4f5c\u3002<br><br>\u627e\u5230\u95ee\u9898\u540e\uff0c\u89e3\u51b3\u65b9\u6848\u5c31\u5f88\u660e\u786e\u4e86\uff1a\u6211\u4eec\u4e0e\u4e1a\u52a1\u65b9\u6c9f\u901a\uff0c\u4f18\u5316\u4e86\u8fd9\u6761SQL\uff0c\u5e76\u4e3a\u5176\u6dfb\u52a0\u4e86\u5408\u9002\u7684\u590d\u5408\u7d22\u5f15\uff0c\u4f7f\u5176\u4ece\u8868\u9501\u964d\u7ea7\u4e3a\u884c\u9501\u3002\u4e0a\u7ebf\u540e\uff0c\u670d\u52a1\u6027\u80fd\u6bdb\u523a\u7684\u95ee\u9898\u5c31\u5f7b\u5e95\u6d88\u5931\u4e86\u3002\"<br><\/pre>\n\n\n\n<p><strong>2.3.2 \u8fdb\u9636\u65b9\u6848\uff1a\u7834\u89e3\u4e34\u952e\u9501\u5f15\u53d1\u7684\u5e76\u53d1\u6b7b\u9501<\/strong><\/p>\n\n\n\n<p>\u8fd9\u4e2a\u6848\u4f8b\u66f4\u80fd\u4f53\u73b0\u4f60\u5bf9InnoDB\u9501\u673a\u5236\u7684\u6df1\u5ea6\u7406\u89e3\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\"\u6211\u4eec\u6709\u4e00\u4e2a\u4e1a\u52a1\u573a\u666f\uff0c\u9700\u8981\u5728\u4e00\u4e2a\u4e8b\u52a1\u91cc\u5148\u67e5\u8be2\u67d0\u4e2a\u8d44\u6e90\u4f4d\u662f\u5426\u5b58\u5728\uff0c\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5c31\u8ba1\u7b97\u5e76\u63d2\u5165\u4e00\u4e2a\u65b0\u8d44\u6e90\uff1b\u5982\u679c\u5df2\u5b58\u5728\uff0c\u5c31\u57fa\u4e8e\u73b0\u6709\u8d44\u6e90\u8fdb\u884c\u66f4\u65b0\u3002\u8fd9\u4e2a\u903b\u8f91\u53ef\u4ee5\u7b80\u5316\u4e3a'\u67e5\u8be2\u5e76\u9501\u5b9a\uff0c\u7136\u540e\u63d2\u5165\u6216\u66f4\u65b0'\u3002\n<\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"731\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-267-1024x731.png\" alt=\"\" class=\"wp-image-18994\" style=\"width:502px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-267-1024x731.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-267-300x214.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-267-768x548.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-267-1536x1097.png 1536w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-267-830x593.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-267-230x164.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-267-350x250.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-267-480x343.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-267.png 1588w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u4f2a\u4ee3\u7801\u5927\u6982\u662f\u8fd9\u6837\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">BEGIN;\nSELECT * FROM resource WHERE position = ? FOR UPDATE;\n-- \u5982\u679c\u8bb0\u5f55\u4e0d\u5b58\u5728\nINSERT INTO resource (...) VALUES (...);\n-- \u5982\u679c\u8bb0\u5f55\u5b58\u5728\n-- UPDATE resource SET ... WHERE position = ?;\nCOMMIT;<\/pre>\n\n\n\n<p>\u770b\u8d77\u6765\u662f\u4e0d\u662f\u6ca1\u6709\u4efb\u4f55\u95ee\u9898\uff1f\u5b9e\u9645\u4e0a\uff0c\u8fd9\u4e2a\u5730\u65b9\u5728\u9ad8\u5e76\u53d1\u4e0b\u4f1a\u5f15\u8d77\u6b7b\u9501\u3002<\/p>\n\n\n\n<p>\u5047\u8bbe\u73b0\u5728\u6570\u636e\u5e93\u4e2dID\u6700\u5927\u7684\u503c\u662f780\u3002\u90a3\u4e48\u5982\u679c\u4e24\u4e2a\u4e1a\u52a1\u7ebf\u7a0b\u51e0\u4e4e\u540c\u65f6\u8fdb\u6765\uff0c\u6267\u884c\u8fd9\u6bb5\u903b\u8f91\uff0c\u4e00\u4e2a\u51c6\u5907\u63d2\u5165id=790\u7684\u6570\u636e\uff0c\u4e00\u4e2a\u51c6\u5907\u63d2\u5165id=800\u7684\u6570\u636e\u3002\u5982\u679c\u5b83\u4eec\u7684\u6267\u884c\u65f6\u5e8f\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u90a3\u4e48\u4f60\u5c31\u4f1a\u5f97\u5230\u4e00\u4e2a\u6b7b\u9501\u9519\u8bef\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"566\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-269-1024x566.png\" alt=\"\" class=\"wp-image-18997\" style=\"width:520px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-269-1024x566.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-269-300x166.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-269-768x425.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-269-1536x849.png 1536w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-269-830x459.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-269-230x127.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-269-350x193.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-269-480x265.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-269.png 1592w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<pre class=\"wp-block-preformatted\">\u8fd9\u6bb5\u4ee3\u7801\u5728\u5e76\u53d1\u91cf\u4e0a\u6765\u540e\uff0c\u9891\u7e41\u5730\u5f15\u53d1\u6570\u636e\u5e93\u6b7b\u9501\u3002\u7ecf\u8fc7\u590d\u76d8\uff0c\u6211\u4eec\u53d1\u73b0\u6b7b\u9501\u7684\u6839\u6e90\u5728\u4e8e\u4e34\u952e\u9501\u3002\u5047\u8bbeposition\u7d22\u5f15\u5f53\u524d\u7684\u6700\u5927\u503c\u662f780\uff0c\u4e24\u4e2a\u5e76\u53d1\u4e8b\u52a1\u5206\u522b\u5c1d\u8bd5\u64cd\u4f5cposition=790\u548cposition=800\u3002\u7531\u4e8e\u8fd9\u4e24\u6761\u8bb0\u5f55\u90fd\u4e0d\u5b58\u5728\uff0c\u5b83\u4eec\u90fd\u4f1a\u5728(780, +\u221e)\u8fd9\u4e2a\u95f4\u9699\u4e0a\u6210\u529f\u83b7\u5f97\u4e34\u952e\u9501\u3002\u63a5\u7740\uff0c\u4e8b\u52a1A\u60f3\u63d2\u5165790\uff0c\u9700\u8981\u83b7\u53d6790\u7684\u884c\u9501\uff0c\u4f46\u8fd9\u4e2a\u4f4d\u7f6e\u88ab\u4e8b\u52a1B\u7684\u4e34\u952e\u9501\u8986\u76d6\uff0c\u4e8e\u662f\u7b49\u5f85\uff1b\u540c\u65f6\uff0c\u4e8b\u52a1B\u60f3\u63d2\u5165800\uff0c\u4e5f\u88ab\u4e8b\u52a1A\u7684\u4e34\u952e\u9501\u8986\u76d6\uff0c\u4e5f\u5f00\u59cb\u7b49\u5f85\u3002\u8fd9\u6837\uff0c\u4e24\u4e2a\u4e8b\u52a1\u4e92\u76f8\u7b49\u5f85\u5bf9\u65b9\u91ca\u653e\u81ea\u5df1\u9700\u8981\u7684\u95f4\u9699\uff0c\u5c31\u5f62\u6210\u4e86\u6b7b\u9501\u3002<\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"491\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-270-1024x491.png\" alt=\"\" class=\"wp-image-18998\" style=\"width:560px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-270-1024x491.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-270-300x144.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-270-768x369.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-270-1536x737.png 1536w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-270-830x398.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-270-230x110.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-270-350x168.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-270-480x230.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-270.png 1596w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u9488\u5bf9\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u5f53\u65f6\u63a2\u8ba8\u4e86\u4e09\u79cd\u89e3\u51b3\u65b9\u6848\uff1a<a href=\"https:\/\/golangstar.cn\/backend_series\/advanced_interview\/database_lock.html#_2-3-\u9762\u8bd5\u4eae\u70b9\u65b9\u6848\"><\/a><\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u8c03\u6574\u4e1a\u52a1\u903b\u8f91\uff1a\u5c06'\u5148\u67e5\u540e\u63d2'\u6539\u4e3a'\u76f4\u63a5\u63d2\u5165'\u3002\u6211\u4eec\u5c1d\u8bd5\u76f4\u63a5INSERT\uff0c\u5982\u679c\u6210\u529f\uff0c\u8bf4\u660e\u8d44\u6e90\u4f4d\u539f\u5148\u4e3a\u7a7a\uff1b\u5982\u679c\u56e0\u4e3a\u4e3b\u952e\u6216\u552f\u4e00\u952e\u51b2\u7a81\u800c\u5931\u8d25\uff0c\u5219\u8bf4\u660e\u8d44\u6e90\u4f4d\u5df2\u5b58\u5728\uff0c\u518d\u53bb\u6267\u884c\u66f4\u65b0\u903b\u8f91\u3002\u8fd9\u6837\uff0c\u6210\u529f\u7684\u4e8b\u52a1\u4ece\u4e00\u5f00\u59cb\u5c31\u6301\u6709\u884c\u9501\uff0c\u800c\u4e0d\u662f\u4e34\u952e\u9501\uff0c\u4ece\u800c\u89c4\u907f\u4e86\u6b7b\u9501\u3002<br><br>\u964d\u4f4e\u9694\u79bb\u7ea7\u522b\uff1a\u5c06\u4e8b\u52a1\u7684\u9694\u79bb\u7ea7\u522b\u4eceRR\u964d\u4e3aRC\uff08\u8bfb\u5df2\u63d0\u4ea4\uff09\u3002\u5728RC\u7ea7\u522b\u4e0b\uff0c\u6ca1\u6709\u95f4\u9699\u9501\uff0c\u81ea\u7136\u4e5f\u5c31\u6ca1\u6709\u4e34\u952e\u9501\uff0c\u6b7b\u9501\u95ee\u9898\u8fce\u5203\u800c\u89e3\u3002\u4f46\u8fd9\u4e2a\u65b9\u6848\u5f71\u54cd\u8f83\u5927\uff0c\u9700\u8981\u8bc4\u4f30\u4e1a\u52a1\u662f\u5426\u80fd\u63a5\u53d7RC\u7ea7\u522b\u53ef\u80fd\u5e26\u6765\u7684\u4e0d\u53ef\u91cd\u590d\u8bfb\u548c\u5e7b\u8bfb\u95ee\u9898\u3002<br><br>\u6539\u7528\u4e50\u89c2\u9501\uff1a\u5b8c\u5168\u653e\u5f03\u60b2\u89c2\u9501\uff0c\u4f46\u8fd9\u9700\u8981\u5bf9\u4ee3\u7801\u8fdb\u884c\u8f83\u5927\u8303\u56f4\u7684\u91cd\u6784\u3002<br><br>\u6700\u7ec8\uff0c\u6211\u4eec\u9009\u62e9\u4e86\u7b2c\u4e00\u79cd\u65b9\u6848\uff0c\u56e0\u4e3a\u5b83\u5bf9\u4ee3\u7801\u7684\u4fb5\u5165\u6027\u6700\u5c0f\uff0c\u4e14\u6548\u679c\u7acb\u7aff\u89c1\u5f71\u3002\"<\/pre>\n\n\n\n<p><strong>2.3.3 \u9ad8\u9636\u91cd\u6784\uff1a\u4ee5\u4e50\u89c2\u9501\u66ff\u4ee3\u4e0d\u5fc5\u8981\u7684\u60b2\u89c2\u9501<\/strong><\/p>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u5c06\u8fd9\u4e2a\u6848\u4f8b\u5305\u88c5\u6210\u4e00\u6b21\u4e3b\u52a8\u7684\u6280\u672f\u91cd\u6784\uff0c\u4f53\u73b0\u4f60\u7684\u67b6\u6784\u601d\u7ef4\u548c\u6027\u80fd\u610f\u8bc6\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\"\u5728\u6211\u4e4b\u524d\u8d1f\u8d23\u7684\u4e00\u4e2a\u9879\u76ee\u4e2d\uff0c\u6211\u6ce8\u610f\u5230\u8bb8\u591a\u6838\u5fc3\u4e1a\u52a1\u6a21\u5757\u4e3a\u4e86\u4fdd\u8bc1\u6570\u636e\u4e00\u81f4\u6027\uff0c\u666e\u904d\u91c7\u7528\u4e86SELECT ... FOR UPDATE\u7684\u60b2\u89c2\u9501\u6a21\u5f0f\u3002\u8fd9\u79cd\u6a21\u5f0f\u867d\u7136\u7b80\u5355\u53ef\u9760\uff0c\u4f46\u5728\u8bfb\u591a\u5199\u5c11\u7684\u573a\u666f\u4e0b\uff0c\u4f1a\u9020\u6210\u4e0d\u5fc5\u8981\u7684\u7ebf\u7a0b\u7b49\u5f85\uff0c\u6781\u5927\u5730\u9650\u5236\u4e86\u7cfb\u7edf\u7684\u5e76\u53d1\u80fd\u529b\u3002<br>\u56e0\u6b64\uff0c\u6211\u4e3b\u5bfc\u4e86\u4e00\u9879\u6280\u672f\u4f18\u5316\uff0c\u5bf9\u8fd9\u4e9b\u4e0d\u5fc5\u8981\u7684\u60b2\u89c2\u9501\u8fdb\u884c\u4e50\u89c2\u9501\u6539\u9020\u3002\u6539\u9020\u7684\u6838\u5fc3\u601d\u60f3\u662f\uff0c\u5728\u4e8b\u52a1\u4e2d\u53bb\u6389FOR UPDATE\uff0c\u5e76\u5728UPDATE\u8bed\u53e5\u4e2d\u589e\u52a0\u5bf9\u6570\u636e\u7248\u672c\u7684\u6821\u9a8c\u3002<\/pre>\n\n\n\n<p>\u6539\u9020\u524d\u7684\u4f2a\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5f00\u542f\u4e8b\u52a1\u5e76\u52a0\u9501\ntx.Begin()\ndata := tx.SelectForUpdate(id) \n\/\/ \u4e1a\u52a1\u8ba1\u7b97\nnewData := calculate(data)\ntx.Update(newData)\ntx.Commit()<\/pre>\n\n\n\n<p>\u6539\u9020\u540e\u7684\u4f2a\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">for {\n    \/\/ 1. \u666e\u901a\u67e5\u8be2\uff0c\u83b7\u53d6\u6570\u636e\u548c\u7248\u672c\u53f7\n    data, version := SelectWithVersion(id)\n    \/\/ 2. \u4e1a\u52a1\u8ba1\u7b97\n    newData := calculate(data)\n    \/\/ 3. CAS\u66f4\u65b0\uff0c\u901a\u8fc7\u7248\u672c\u53f7\u9632\u6b62\u5e76\u53d1\u4fee\u6539\n    rowsAffected := UpdateWithCAS(id, newData, version)\n    \/\/ 4. \u5982\u679c\u66f4\u65b0\u6210\u529f\uff08\u5f71\u54cd\u884c\u6570\u4e3a1\uff09\uff0c\u5219\u9000\u51fa\u5faa\u73af\n    if rowsAffected == 1 {\n        break\n    }\n    \/\/ \u5982\u679c\u66f4\u65b0\u5931\u8d25\uff0c\u5219\u5faa\u73af\u91cd\u8bd5\n}<\/pre>\n\n\n\n<p>\u8fd9\u6b21\u91cd\u6784\u7684\u6548\u679c\u975e\u5e38\u663e\u8457\uff0c\u6838\u5fc3\u63a5\u53e3\u7684\u541e\u5410\u91cf\u63d0\u5347\u4e86\u5c06\u8fd130%\u3002\u5f53\u7136\uff0c\u8fd9\u4e2a\u65b9\u6848\u5e76\u975e\u4e07\u80fd\u7075\u836f\u3002\u5bf9\u4e8e\u90a3\u4e9b\u5199\u51b2\u7a81\u975e\u5e38\u9891\u7e41\u7684\u4e1a\u52a1\uff0c\u4f7f\u7528\u4e50\u89c2\u9501\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5927\u91cf\u7684\u91cd\u8bd5\uff0c\u53cd\u800c\u964d\u4f4e\u6027\u80fd\uff0c\u8fd9\u79cd\u573a\u666f\u4e0b\u4fdd\u7559\u60b2\u89c2\u9501\u4f9d\u7136\u662f\u66f4\u660e\u667a\u7684\u9009\u62e9\u3002&#8221;<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>3. \u5c0f\u7ed3<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u8fd9\u7bc7\u6587\u7ae0\uff0c\u6211\u4eec\u7cfb\u7edf\u6027\u5730\u68b3\u7406\u4e86MySQL\u9501\u673a\u5236\u7684\u65b9\u65b9\u9762\u9762\u3002\u4ece\u9501\u4e0e\u7d22\u5f15\u7684\u5171\u751f\u5173\u7cfb\uff0c\u5230\u4e0d\u540c\u7ef4\u5ea6\u4e0b\u9501\u7684\u5206\u7c7b\uff08\u884c\u9501\u4e0e\u8868\u9501\u3001\u5171\u4eab\u9501\u4e0e\u6392\u5b83\u9501\u3001\u610f\u5411\u9501\uff09\uff0c\u518d\u5230InnoDB\u4e3a\u4e86\u89e3\u51b3\u5e7b\u8bfb\u95ee\u9898\u800c\u8bbe\u8ba1\u7684\u4e09\u79cd\u6838\u5fc3\u9501\u5f62\u6001\uff08\u8bb0\u5f55\u9501\u3001\u95f4\u9699\u9501\u3001\u4e34\u952e\u9501\uff09\uff0c\u6211\u4eec\u5efa\u7acb\u4e86\u4e00\u4e2a\u76f8\u5bf9\u5b8c\u6574\u7684\u77e5\u8bc6\u6846\u67b6\u3002<\/p>\n\n\n\n<p>\u66f4\u91cd\u8981\u7684\u662f\uff0c\u6211\u4eec\u5fc5\u987b\u8ba4\u8bc6\u5230\uff0c\u5bf9\u9501\u7684\u7406\u89e3\u4e0d\u80fd\u6b62\u6b65\u4e8e\u7406\u8bba\u3002\u65e0\u8bba\u662f\u901a\u8fc7&#8221;\u4e3a\u7f3a\u5931\u7d22\u5f15\u7684\u67e5\u8be2\u8865\u4e0a\u7d22\u5f15&#8221;\u6765\u907f\u514d\u8868\u9501\u7684\u57fa\u7840\u4f18\u5316\uff0c\u8fd8\u662f\u5206\u6790&#8221;\u4e34\u952e\u9501\u5f15\u53d1\u6b7b\u9501&#8221;\u548c&#8221;\u4ee5\u4e50\u89c2\u9501\u66ff\u4ee3\u60b2\u89c2\u9501&#8221;\u8fd9\u7c7b\u66f4\u590d\u6742\u7684\u5b9e\u6218\u573a\u666f\uff0c\u6700\u7ec8\u76ee\u7684\u90fd\u662f\u4e3a\u4e86\u5c06\u7406\u8bba\u77e5\u8bc6\u8f6c\u5316\u4e3a\u89e3\u51b3\u5b9e\u9645\u95ee\u9898\u7684\u80fd\u529b\u3002\u4f60\u5728\u9762\u8bd5\u4e2d\u51c6\u5907\u7684\u6848\u4f8b\uff0c\u4e0d\u5e94\u4ec5\u4ec5\u662f\u80cc\u8bf5\u7684\u811a\u672c\uff0c\u800c\u5e94\u662f\u4f60\u5bf9\u8fd9\u4e9b\u95ee\u9898\u6df1\u5165\u601d\u8003\u548c\u7406\u89e3\u7684\u4f53\u73b0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8f6c\u8f7d\uff1a\u4e3a\u4ec0\u4e48MySQL\u7684\u884c\u9501\u4f1a\u5347\u7ea7\u4e3a\u8868\u9501\uff1f \u4eca\u5929\u6211\u4eec\u6765\u6df1\u5165\u63a2\u8ba8\u4e00\u4e0bMySQL\u4e2d\u7684\u9501\u673a\u5236\u3002\u5728\u6570\u636e\u5e93\u76f8\u5173\u7684\u9762\u8bd5\u4e2d\uff0c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/18983"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=18983"}],"version-history":[{"count":3,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/18983\/revisions"}],"predecessor-version":[{"id":18999,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/18983\/revisions\/18999"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18983"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18983"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18983"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}