{"id":15768,"date":"2024-07-09T20:01:01","date_gmt":"2024-07-09T12:01:01","guid":{"rendered":"https:\/\/92it.top\/?p=15768"},"modified":"2024-07-09T20:01:01","modified_gmt":"2024-07-09T12:01:01","slug":"%e8%bf%99%e4%b8%8b%e5%bd%bb%e5%ba%95%e6%8a%8a-mysql%e7%9a%84%e9%94%81%e6%90%9e%e6%87%82%e4%ba%86","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=15768","title":{"rendered":"\u8fd9\u4e0b\u5f7b\u5e95\u628a MySQL\u7684\u9501\u641e\u61c2\u4e86"},"content":{"rendered":"\n

\u8f6c\u8f7d\uff1a\u809d\u4e86\u4e00\u5468\uff0c\u8fd9\u4e0b\u5f7b\u5e95\u628a MySQL\u7684\u9501\u641e\u61c2\u4e86<\/a><\/p>\n\n\n\n

\u7533\u660e\uff1a\u672c\u6587\u57fa\u4e8e MySQL 8.0.30 \u7248\u672c\uff0cInnoDB \u5f15\u64ce<\/p>\n\n\n\n

MySQL \u6570\u636e\u5e93\u9501\u8bbe\u8ba1\u7684\u521d\u8877\u662f\u5904\u7406\u5e76\u53d1\u95ee\u9898\uff0c\u4fdd\u8bc1\u6570\u636e\u5b89\u5168\u3002MySQL \u6570\u636e\u5e93\u9501\u53ef\u4ee5\u4ece\u4e0b\u9762 3 \u4e2a\u7ef4\u5ea6\u8fdb\u884c\u5212\u5206\uff1a<\/p>\n\n\n\n

    \n
  1. \u6309\u7167\u9501\u7684\u4f7f\u7528\u65b9\u5f0f\uff0cMySQL \u9501\u53ef\u4ee5\u5206\u6210\u5171\u4eab\u9501\u3001\u6392\u4ed6\u9501\u4e24\u79cd\uff1b<\/li>\n\n\n\n
  2. \u6839\u636e\u52a0\u9501\u7684\u8303\u56f4\uff0cMySQL \u9501\u5927\u81f4\u53ef\u4ee5\u5206\u6210\u5168\u5c40\u9501\u3001\u8868\u7ea7\u9501\u548c\u884c\u9501\u4e09\u7c7b\uff1b<\/li>\n\n\n\n
  3. \u4ece\u601d\u60f3\u5c42\u9762\u4e0a\u770b\uff0cMySQL \u9501\u53ef\u4ee5\u5206\u4e3a\u60b2\u89c2\u9501\u3001\u4e50\u89c2\u9501\u4e24\u79cd\uff1b<\/li>\n<\/ol>\n\n\n\n

    \u6211\u4eec\u5148\u8bb2\u89e3\u5171\u4eab\u9501\u548c\u6392\u5b83\u9501\uff0c\u7136\u540e\u8bb2\u89e3\u5168\u5c40\u9501\u3001\u8868\u7ea7\u9501\u548c\u884c\u9501\uff0c\u56e0\u4e3a\u8fd9\u4e09\u79cd\u7c7b\u522b\u7684\u9501\u4e2d\uff0c\u6709\u4e9b\u662f\u5171\u4eab\u9501\uff0c\u6709\u4e9b\u662f\u6392\u4ed6\u9501\uff0c\u6700\u540e\u518d\u8bb2\u89e3\u60b2\u89c2\u9501\u548c\u4e50\u89c2\u9501\u3002<\/p>\n\n\n

    \n
    \"\"<\/figure><\/div>\n\n\n

    \u4e00\u3001\u5171\u4eab\u9501\u548c\u6392\u4ed6\u9501<\/strong><\/p>\n\n\n\n

    \n\n\n\n

    1.1 \u5171\u4eab\u9501<\/strong><\/p>\n\n\n\n

    \u5171\u4eab\u9501\uff0cShare lock\uff0c\u4e5f\u53eb\u8bfb\u9501\u3002\u5b83\u662f\u6307\u5f53\u5bf9\u8c61\u88ab\u9501\u5b9a\u65f6\uff0c\u5141\u8bb8\u5176\u5b83\u4e8b\u52a1\u8bfb\u53d6\u8be5\u5bf9\u8c61\uff0c\u4e5f\u5141\u8bb8\u5176\u5b83\u4e8b\u52a1\u4ece\u8be5\u5bf9\u8c61\u4e0a\u518d\u6b21\u83b7\u53d6\u5171\u4eab\u9501\uff0c\u4f46\u4e0d\u80fd\u5bf9\u8be5\u5bf9\u8c61\u8fdb\u884c\u5199\u5165\u3002\u52a0\u9501\u65b9\u5f0f\u6709\u5982\u4e0b\u4e24\u79cd\u65b9\u5f0f\uff1a<\/p>\n\n\n\n

    #\u65b9\u5f0f1\nselect ... lock in share mode;\n#\u65b9\u5f0f2\nselect ... for share;<\/pre>\n\n\n\n
    \u5982\u679c\u4e8b\u52a1 T1 \u5728\u67d0\u5bf9\u8c61\u6301\u6709\u5171\u4eab(S)\u9501\uff0c\u5219\u4e8b\u52a1 T2 \u9700\u8981\u518d\u6b21\u83b7\u53d6\u8be5\u5bf9\u8c61\u7684\u9501\u65f6\uff0c\u4f1a\u51fa\u73b0\u4e0b\u9762\u4e24\u79cd\u60c5\u51b5\uff1a<\/p>\n\n\n\n
      \n
    1. \u5982\u679c T2 \u83b7\u53d6\u8be5\u5bf9\u8c61\u7684\u5171\u4eab(S)\u9501\uff0c\u5219\u53ef\u4ee5\u7acb\u5373\u83b7\u53d6\u9501\uff1b<\/li>\n\n\n\n
    2. \u5982\u679c T2 \u83b7\u53d6\u8be5\u5bf9\u8c61\u7684\u6392\u4ed6(X)\u9501\uff0c\u5219\u65e0\u6cd5\u83b7\u53d6\u9501\uff1b<\/li>\n<\/ol>\n\n\n\n
      \u4e3a\u4e86\u66f4\u597d\u7684\u7406\u89e3\u4e0a\u8ff0\u4e24\u79cd\u60c5\u51b5\uff0c\u53ef\u4ee5\u53c2\u7167\u4e0b\u9762\u7684\u6267\u884c\u987a\u5e8f\u6d41\u548c\u5b9e\u4f8b\u56fe\uff1a<\/p>\n\n\n\n
      \u7ed9 user \u8868\u52a0\u5171\u4eab\u9501<\/strong><\/p>\n\n\n
      \n
      \"\"<\/figure><\/div>\n\n
      \n
      \"\"<\/figure><\/div>\n\n\n
      \u7ed9 user \u8868 id=3 \u7684\u884c\u52a0\u5171\u4eab\u9501<\/strong><\/p>\n\n\n
      \n
      \"\"<\/figure><\/div>\n\n
      \n
      \"\"<\/figure><\/div>\n\n\n
      \u901a\u8fc7\u4e0a\u8ff0\u4e24\u4e2a\u5b9e\u4f8b\u53ef\u4ee5\u770b\u51fa\uff1a<\/p>\n\n\n\n
        \n
      • \u5f53\u5171\u4eab\u9501\u52a0\u5728 user \u8868\u4e0a\uff0c\u5219\u5176\u5b83\u4e8b\u52a1\u53ef\u4ee5\u518d\u6b21\u83b7\u53d6 user \u8868\u7684\u5171\u4eab\u9501\uff0c\u5176\u5b83\u4e8b\u52a1\u518d\u6b21\u83b7\u53d6 user \u8868\u7684\u6392\u4ed6\u9501\u5931\u8d25\uff0c\u64cd\u4f5c\u88ab\u5835\u585e\uff1b<\/li>\n\n\n\n
      • \u5f53\u5171\u4eab\u9501\u52a0\u5728 user \u8868 id=3 \u7684\u884c\u4e0a\uff0c\u5219\u5176\u5b83\u4e8b\u52a1\u53ef\u4ee5\u518d\u6b21\u83b7\u53d6 user \u8868 id=3 \u884c\u4e0a\u7684\u5171\u4eab\u9501\uff0c\u5176\u5b83\u4e8b\u52a1\u518d\u6b21\u83b7\u53d6 user \u8868 id=3 \u884c\u4e0a\u7684\u6392\u4ed6\u9501\u5931\u8d25\uff0c\u64cd\u4f5c\u88ab\u5835\u585e\uff0c\u4f46\u662f\u4e8b\u52a1\u53ef\u4ee5\u518d\u6b21\u83b7\u53d6 user \u8868 id!=3 \u884c\u4e0a\u7684\u6392\u4ed6\u9501\uff1b<\/li>\n<\/ul>\n\n\n\n
        1.2 \u6392\u4ed6\u9501<\/strong><\/p>\n\n\n\n
        \u6392\u5b83\u9501\uff0cExclusive Lock\uff0c\u4e5f\u53eb\u5199\u9501\u6216\u8005\u72ec\u5360\u9501\uff0c\u4e3b\u8981\u662f\u9632\u6b62\u5176\u5b83\u4e8b\u52a1\u548c\u5f53\u524d\u52a0\u9501\u4e8b\u52a1\u9501\u5b9a\u540c\u4e00\u5bf9\u8c61\u3002\u540c\u4e00\u5bf9\u8c61\u4e3b\u8981\u6709\u4e24\u5c42\u542b\u4e49\uff1a<\/p>\n\n\n\n
          \n
        1. \u5f53\u6392\u4ed6\u9501\u52a0\u5728\u8868\u4e0a\uff0c\u5219\u5176\u5b83\u4e8b\u52a1\u65e0\u6cd5\u5bf9\u8be5\u8868\u8fdb\u884c insert,update,delete,alter,drop \u7b49\u66f4\u65b0\u64cd\u4f5c\uff1b<\/li>\n\n\n\n
        2. \u5f53\u6392\u4ed6\u9501\u52a0\u5728\u8868\u7684\u884c\u4e0a\uff0c\u5219\u5176\u5b83\u4e8b\u52a1\u65e0\u6cd5\u5bf9\u8be5\u884c\u8fdb\u884c insert,update,delete,alter,drop \u7b49\u66f4\u65b0\u64cd\u4f5c\uff1b<\/li>\n<\/ol>\n\n\n\n
          \u6392\u5b83\u9501\u52a0\u9501\u65b9\u5f0f\u4e3a\uff1a<\/p>\n\n\n\n
          # \u6392\u5b83\u9501\u52a0\u9501\u65b9\u5f0f\nselect ... for update;<\/pre>\n\n\n\n
          \u4e3a\u4e86\u66f4\u597d\u5730\u8bf4\u660e\u6392\u4ed6\u9501\uff0c\u53ef\u4ee5\u53c2\u7167\u4e0b\u9762\u7684\u6267\u884c\u987a\u5e8f\u6d41\u548c\u5b9e\u4f8b\u56fe\uff1a<\/p>\n\n\n\n
          \u7ed9 user \u8868\u5bf9\u8c61\u52a0\u6392\u4ed6\u9501<\/strong><\/p>\n\n\n
          \n
          \"\"<\/figure><\/div>\n\n
          \n
          \"\"<\/figure><\/div>\n\n\n
          \u7ed9 user \u8868 id=3 \u7684\u884c\u5bf9\u8c61\u52a0\u6392\u4ed6\u9501<\/strong><\/strong><\/strong><\/strong><\/p>\n\n\n
          \n
          \"\"<\/figure><\/div>\n\n
          \n
          \"\"<\/figure><\/div>\n\n\n
          \u4e8c\u3001\u5168\u5c40\u9501 & \u8868\u9501 & \u884c\u9501<\/strong><\/p>\n\n\n\n
          \n\n\n\n
          2.1 \u5168\u5c40\u9501<\/strong><\/p>\n\n\n\n
          \u5168\u5c40\u9501\uff0c\u987e\u540d\u601d\u4e49\uff0c\u5c31\u662f\u5bf9\u6574\u4e2a\u6570\u636e\u5e93\u5b9e\u4f8b\u52a0\u9501\uff0c\u5b83\u662f\u7c92\u5ea6\u6700\u5927\u7684\u9501\u3002<\/p>\n\n\n\n
          \u5728 MySQL \u4e2d\uff0c\u901a\u8fc7\u6267\u884c flush tables with read lock \u6307\u4ee4\u52a0\u5168\u5c40\u9501\uff1a<\/p>\n\n\n\n
          # \u52a0\u5168\u5c40\u9501\nflush tables with read lock<\/pre>\n\n\n\n
          \u6307\u4ee4\u6267\u884c\u5b8c\uff0c\u6574\u4e2a\u6570\u636e\u5e93\u5c31\u5904\u4e8e\u53ea\u8bfb\u72b6\u6001\u4e86\uff0c\u5176\u4ed6\u7ebf\u7a0b\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff0c\u90fd\u4f1a\u88ab\u963b\u585e\uff1a<\/p>\n\n\n\n
            \n
          • \u6570\u636e\u66f4\u65b0\u8bed\u53e5\u88ab\u963b\u585e\uff0c\u5305\u62ec insert, update, delete \u8bed\u53e5\uff1b<\/li>\n\n\n\n
          • \u6570\u636e\u5b9a\u4e49\u8bed\u53e5\u88ab\u963b\u585e\uff0c\u5305\u62ec\u5efa\u8868 create table,alter table\u3001drop table \u8bed\u53e5\uff1b<\/li>\n\n\n\n
          • \u66f4\u65b0\u64cd\u4f5c\u4e8b\u52a1 commit \u8bed\u53e5\u88ab\u963b\u585e\uff1b<\/li>\n<\/ul>\n\n\n\n
            MySQl \u91ca\u653e\u9501\u6709 2 \u79cd\u65b9\u5f0f\uff1a<\/p>\n\n\n\n
              \n
            1. \u6267\u884c unlock tables \u6307\u4ee4\uff1aunlock tables<\/li>\n\n\n\n
            2. \u52a0\u9501\u7684\u4f1a\u8bdd\u65ad\u5f00\uff0c\u5168\u5c40\u9501\u4e5f\u4f1a\u88ab\u81ea\u52a8\u91ca\u653e<\/li>\n<\/ol>\n\n\n\n
              \u4e3a\u4e86\u66f4\u597d\u5730\u8bf4\u660e\u5168\u5c40\u9501\uff0c\u53ef\u4ee5\u53c2\u7167\u4e0b\u9762\u7684\u6267\u884c\u987a\u5e8f\u6d41\u548c\u5b9e\u4f8b\u56fe\uff1a<\/p>\n\n\n
              \n
              \"\"<\/figure><\/div>\n\n
              \n
              \"\"<\/figure><\/div>\n\n\n
              \u901a\u8fc7\u4e0a\u8ff0\u7684\u5b9e\u4f8b\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53\u52a0\u5168\u5c40\u9501\u65f6\uff0c\u5e93\u4e0b\u9762\u6240\u6709\u7684\u8868\u90fd\u5904\u4e8e\u53ea\u8bfb\u72b6\u6001\uff0c\u4e0d\u7ba1\u662f\u5f53\u524d\u4e8b\u52a1\u8fd8\u662f\u5176\u4ed6\u4e8b\u52a1\uff0c\u5bf9\u4e8e\u5e93\u4e0b\u9762\u6240\u6709\u7684\u8868\u53ea\u80fd\u8bfb\uff0c\u4e0d\u80fd\u6267\u884c insert\uff0cupdate\uff0cdelete\uff0calter\uff0cdrop \u7b49\u66f4\u65b0\u64cd\u4f5c\u3002<\/p>\n\n\n\n
              \u5168\u5c40\u9501\u7684\u5178\u578b\u4f7f\u7528\u573a\u666f\u662f\u505a\u5168\u5e93\u903b\u8f91\u5907\u4efd\uff0c\u5728\u5907\u4efd\u8fc7\u7a0b\u4e2d\u6574\u4e2a\u5e93\u5b8c\u5168\u5904\u4e8e\u53ea\u8bfb\u72b6\u6001\u3002\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n
              \n
              \"\"<\/figure><\/div>\n\n\n
              \u5047\u5982\u5728\u4e3b\u5e93\u4e0a\u5907\u4efd\uff0c\u5907\u4efd\u671f\u95f4\uff0c\u4e1a\u52a1\u670d\u52a1\u5668\u4e0d\u80fd\u5bf9\u6570\u636e\u5e93\u6267\u884c\u66f4\u65b0\u64cd\u4f5c\uff0c\u56e0\u6b64\u6d89\u53ca\u5230\u66f4\u65b0\u64cd\u4f5c\u7684\u4e1a\u52a1\u5c31\u762b\u75ea\u4e86\uff1b<\/p>\n\n\n\n
              \u5047\u5982\u5728\u4ece\u5e93\u4e0a\u5907\u4efd\uff0c\u5907\u4efd\u671f\u95f4\uff0c\u4ece\u5e93\u4e0d\u80fd\u6267\u884c\u4e3b\u5e93\u540c\u6b65\u8fc7\u6765\u7684 binlog\uff0c\u4f1a\u5bfc\u81f4\u4e3b\u4ece\u5ef6\u8fdf\u8d8a\u6765\u8d8a\u5927\uff0c\u5982\u679c\u505a\u4e86\u8bfb\u5199\u5206\u79bb\uff0c\u90a3\u4e48\u4ece\u5e93\u4e0a\u83b7\u53d6\u6570\u636e\u5c31\u4f1a\u51fa\u73b0\u5ef6\u65f6\uff0c\u5f71\u54cd\u4e1a\u52a1\uff1b<\/p>\n\n\n\n
              \u4ece\u4e0a\u8ff0\u5206\u6790\u53ef\u4ee5\u770b\u51fa\uff0c\u4f7f\u7528\u5168\u5c40\u9501\u8fdb\u884c\u6570\u636e\u5907\u4efd\uff0c\u4e0d\u7ba1\u662f\u5728\u4e3b\u5e93\u8fd8\u662f\u5728\u4ece\u5e93\u4e0a\u8fdb\u884c\u5907\u4efd\u64cd\u4f5c\uff0c\u5bf9\u4e1a\u52a1\u603b\u662f\u4e0d\u592a\u53cb\u597d\u3002\u90a3\u4e0d\u52a0\u9501\u884c\u4e0d\u884c\uff1f\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e0b\u9762\u8fd8\u94b1\u8f6c\u8d26\u7684\u4f8b\u5b50\uff0c\u770b\u770b\u4e0d\u52a0\u9501\u4f1a\u4e0d\u4f1a\u51fa\u73b0\u95ee\u9898\uff1a<\/p>\n\n\n
              \n
              \"\"<\/figure><\/div>\n\n\n
                \n
              • \u5907\u4efd\u524d\uff1a\u8d26\u6237 A \u6709 1000\uff0c\u8d26\u6237 B \u6709 500<\/li>\n\n\n\n
              • \u6b64\u65f6\uff0c\u53d1\u8d77\u903b\u8f91\u5907\u4efd<\/li>\n\n\n\n
              • \u5047\u5982\u6570\u636e\u5907\u4efd\u65f6\u4e0d\u52a0\u9501\uff0c\u6b64\u65f6\uff0c\u5ba2\u6237\u7aef A \u53d1\u8d77\u4e00\u4e2a\u8fd8\u94b1\u8f6c\u8d26\u7684\u64cd\u4f5c\uff1a\u8d26\u6237 A \u5f80\u8d26\u6237 B \u8f6c 200<\/li>\n\n\n\n
              • \u5f53\u8d26\u6237 A \u8f6c\u51fa 200 \u5b8c\u6210\uff0c\u8d26\u6237 B \u8f6c\u5165 200 \u8fd8\u672a\u5b8c\u6210\u65f6\uff0c\u6574\u4e2a\u6570\u636e\u5907\u4efd\u5b8c\u6210<\/li>\n\n\n\n
              • \u5982\u679c\u7528\u8be5\u5907\u4efd\u6570\u636e\u505a\u6062\u590d\uff0c\u4f1a\u53d1\u73b0\u8d26\u6237 A \u8f6c\u51fa\u4e86 200\uff0c\u8d26\u6237 B \u5374\u6ca1\u6709\u5bf9\u5e94\u7684\u8f6c\u5165\u8bb0\u5f55\uff0c\u8fd9\u6837\u5c31\u4f1a\u4ea7\u751f\u7ea0\u7eb7\uff1aA \u8bf4\u6211\u8d26\u6237\u5c11\u4e86 200\uff0c B \u8bf4\u6211\u6ca1\u6709\u6536\u5230\uff0c\u6700\u540e\uff0cA\uff0cB \u8c01\u90fd\u4e0d\u5e72\u3002<\/li>\n<\/ul>\n\n\n\n
                \u65e2\u7136\u4e0d\u52a0\u9501\u4f1a\u4ea7\u751f\u9519\u8bef\uff0c\u52a0\u5168\u5c40\u9501\u53c8\u4f1a\u5f71\u54cd\u4e1a\u52a1\uff0c\u90a3\u4e48\u6709\u6ca1\u6709\u4e24\u5168\u5176\u7f8e\u7684\u65b9\u5f0f\u5462\uff1f<\/p>\n\n\n\n
                \u6709\uff0cMySQL \u5b98\u65b9\u81ea\u5e26\u7684\u903b\u8f91\u5907\u4efd\u5de5\u5177 mysqldump\uff0c\u5177\u4f53\u6307\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                # \u5907\u4efd\u6570\u636e\nmysqldump \u2013single-transaction<\/pre>\n\n\n\n
                \u6267\u884c\u8be5\u6307\u4ee4\uff0c\u5728\u5907\u4efd\u6570\u636e\u4e4b\u524d\u4f1a\u5148\u542f\u52a8\u4e00\u4e2a\u4e8b\u52a1\uff0c\u6765\u786e\u4fdd\u62ff\u5230\u4e00\u81f4\u6027\u89c6\u56fe\uff0c \u52a0\u4e0a MVCC \u7684\u652f\u6301\uff0c\u4fdd\u8bc1\u5907\u4efd\u8fc7\u7a0b\u4e2d\u6570\u636e\u662f\u53ef\u4ee5\u6b63\u5e38\u66f4\u65b0\u3002\u4f46\u662f\uff0csingle-transaction \u65b9\u6cd5\u53ea\u9002\u7528\u4e8e\u5e93\u4e2d\u6240\u6709\u8868\u90fd\u4f7f\u7528\u4e86\u4e8b\u52a1\u5f15\u64ce\uff0c\u5982\u679c\u6709\u8868\u4f7f\u7528\u4e86\u4e0d\u652f\u6301\u4e8b\u52a1\u7684\u5f15\u64ce\uff0c\u5907\u4efd\u5c31\u53ea\u80fd\u7528 FTWRL \u65b9\u6cd5\u3002<\/p>\n\n\n\n
                2.2 \u8868\u7ea7\u9501<\/strong>   <\/p>\n\n\n\n
                MySQL \u8868\u7ea7\u9501\u6709\u4e24\u79cd\uff1a<\/p>\n\n\n\n
                  \n
                1. \u8868\u9501<\/li>\n\n\n\n
                2. \u5143\u6570\u636e\u9501\uff08metadata lock\uff0cMDL)<\/li>\n<\/ol>\n\n\n\n
                  2.2.1 \u8868\u9501<\/strong><\/p>\n\n\n\n
                  \u8868\u9501\u5c31\u662f\u5bf9\u6574\u5f20\u8868\u52a0\u9501\uff0c\u5305\u542b\u8bfb\u9501\u548c\u5199\u9501\uff0c\u7531 MySQL Server \u5b9e\u73b0\uff0c\u8868\u9501\u9700\u8981\u663e\u793a\u52a0\u9501\u6216\u91ca\u653e\u9501\uff0c\u5177\u4f53\u6307\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                  #\u7ed9\u8868\u52a0\u5199\u9501\nlock tables tablename write;\n\n# \u7ed9\u8868\u52a0\u8bfb\u9501\nlock tables tablename read;\n\n# \u91ca\u653e\u9501\nunlock tables;<\/pre>\n\n\n\n
                  \u8bfb\u9501<\/strong>\uff1a<\/strong>\u4ee3\u8868\u5f53\u524d\u8868\u4e3a\u53ea\u8bfb\u72b6\u6001\uff0c\u8bfb\u9501\u662f\u4e00\u79cd\u5171\u4eab\u9501\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8bfb\u9501\u9664\u4e86\u4f1a\u9650\u5236\u5176\u5b83\u7ebf\u7a0b\u7684\u64cd\u4f5c\u5916\uff0c\u4e5f\u4f1a\u9650\u5236\u52a0\u9501\u7ebf\u7a0b\u7684\u884c\u4e3a\uff0c\u5177\u4f53\u9650\u5236\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                    \n
                  • \u52a0\u9501\u7ebf\u7a0b\u53ea\u80fd\u5bf9\u5f53\u524d\u8868\u8fdb\u884c\u8bfb\u64cd\u4f5c\uff0c\u4e0d\u80fd\u5bf9\u5f53\u524d\u8868\u8fdb\u884c\u66f4\u65b0\u64cd\u4f5c\uff0c\u4e0d\u80fd\u5bf9\u5176\u5b83\u8868\u8fdb\u884c\u6240\u6709\u64cd\u4f5c\uff1b<\/li>\n\n\n\n
                  • \u5176\u5b83\u7ebf\u7a0b\u53ea\u80fd\u5bf9\u5f53\u524d\u8868\u8fdb\u884c\u8bfb\u64cd\u4f5c\uff0c\u4e0d\u80fd\u5bf9\u5f53\u524d\u8868\u8fdb\u884c\u66f4\u65b0\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5bf9\u5176\u5b83\u8868\u8fdb\u884c\u6240\u6709\u64cd\u4f5c\uff1b<\/li>\n<\/ul>\n\n\n\n
                    \u4e3a\u4e86\u66f4\u597d\u5730\u8bf4\u660e\u8bfb\u9501\uff0c\u53ef\u4ee5\u53c2\u7167\u4e0b\u9762\u7684\u6267\u884c\u987a\u5e8f\u6d41\u548c\u5b9e\u4f8b\u56fe\uff1a<\/p>\n\n\n
                    \n
                    \"\"<\/figure><\/div>\n\n
                    \n
                    \"\"<\/figure><\/div>\n\n\n
                    \u5199\u9501\uff1a<\/strong>\u5199\u9501\u662f\u4e00\u79cd\u72ec\u5360\u9501\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5199\u9501\u9664\u4e86\u4f1a\u9650\u5236\u5176\u5b83\u7ebf\u7a0b\u7684\u64cd\u4f5c\u5916\uff0c\u4e5f\u4f1a\u9650\u5236\u52a0\u9501\u7ebf\u7a0b\u7684\u884c\u4e3a\uff0c\u5177\u4f53\u9650\u5236\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                      \n
                    • \u52a0\u9501\u7ebf\u7a0b\u5bf9\u5f53\u524d\u8868\u80fd\u8fdb\u884c\u6240\u6709\u64cd\u4f5c\uff0c\u4e0d\u80fd\u5bf9\u5176\u5b83\u8868\u8fdb\u884c\u4efb\u4f55\u64cd\u4f5c\uff1b<\/li>\n\n\n\n
                    • \u5176\u5b83\u7ebf\u7a0b\u4e0d\u80fd\u5bf9\u5f53\u524d\u8868\u8fdb\u884c\u4efb\u4f55\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5bf9\u5176\u5b83\u8868\u8fdb\u884c\u4efb\u4f55\u64cd\u4f5c\uff1b<\/li>\n<\/ul>\n\n\n
                      \n
                      \"\"<\/figure><\/div>\n\n\n
                      2.2.2 MDL \u5143\u6570\u636e\u9501 <\/strong>  <\/p>\n\n\n\n
                      \u5143\u6570\u636e\u9501\uff1ametadata lock\uff0c\u7b80\u79f0 MDL\uff0c\u5b83\u662f\u5728 MySQL 5.5 \u7248\u672c\u5f15\u8fdb\u7684\u3002\u5143\u6570\u636e\u9501\u4e0d\u7528\u50cf\u8868\u9501\u90a3\u6837\u663e\u5f0f\u7684\u52a0\u9501\u548c\u91ca\u653e\u9501\uff0c\u800c\u662f\u5728\u8bbf\u95ee\u8868\u65f6\u88ab\u81ea\u52a8\u52a0\u4e0a\uff0c\u4ee5\u4fdd\u8bc1\u8bfb\u5199\u7684\u6b63\u786e\u6027\u3002\u52a0\u9501\u548c\u91ca\u653e\u9501\u89c4\u5219\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                        \n
                      • MDL \u8bfb\u9501\u4e4b\u95f4\u4e0d\u4e92\u65a5\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5141\u8bb8\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u5bf9\u52a0\u4e86 MDL \u8bfb\u9501\u7684\u8868\u8fdb\u884c CRUD(\u589e\u5220\u6539\u67e5)\u64cd\u4f5c\uff1b<\/li>\n\n\n\n
                      • MDL \u5199\u9501\uff0c\u5b83\u548c\u8bfb\u9501\u3001\u5199\u9501\u90fd\u662f\u4e92\u65a5\u7684\uff0c\u76ee\u7684\u662f\u7528\u6765\u4fdd\u8bc1\u53d8\u66f4\u8868\u7ed3\u6784\u64cd\u4f5c\u7684\u5b89\u5168\u6027\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5f53\u5bf9\u8868\u7ed3\u6784\u8fdb\u884c\u53d8\u66f4\u65f6\uff0c\u4f1a\u88ab\u9ed8\u8ba4\u52a0 MDL \u5199\u9501\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u6709\u4e24\u4e2a\u7ebf\u7a0b\u8981\u540c\u65f6\u7ed9\u4e00\u4e2a\u8868\u52a0\u5b57\u6bb5\uff0c\u5176\u4e2d\u4e00\u4e2a\u8981\u7b49\u53e6\u4e00\u4e2a\u6267\u884c\u5b8c\u624d\u80fd\u5f00\u59cb\u6267\u884c\u3002<\/li>\n\n\n\n
                      • MDL \u8bfb\u5199\u9501\u662f\u5728\u4e8b\u52a1 commit \u4e4b\u540e\u624d\u4f1a\u88ab\u91ca\u653e\uff1b<\/li>\n<\/ul>\n\n\n\n
                        \u4e3a\u4e86\u66f4\u597d\u7684\u8bf4\u660e MDL \u8bfb\u9501\u89c4\u5219\uff0c\u53ef\u4ee5\u53c2\u7167\u4e0b\u9762\u7684\u987a\u5e8f\u6267\u884c\u6d41\u548c\u5b9e\u4f8b\u56fe\uff1a<\/p>\n\n\n
                        \n
                        \"\"<\/figure><\/div>\n\n
                        \n
                        \"\"<\/figure><\/div>\n\n\n
                        \u4e3a\u4e86\u66f4\u597d\u7684\u8bf4\u660e MDL \u5199\u9501\u89c4\u5219\uff0c\u53ef\u4ee5\u53c2\u7167\u4e0b\u9762\u7684\u987a\u5e8f\u6267\u884c\u6d41\u548c\u5b9e\u4f8b\u56fe\uff1a<\/p>\n\n\n
                        \n
                        \"\"<\/figure><\/div>\n\n
                        \n
                        \"\"<\/figure><\/div>\n\n\n
                        2.2.3 \u610f\u5411\u9501<\/strong><\/p>\n\n\n\n
                        \u7531\u4e8e InnoDB \u5f15\u64ce\u652f\u6301\u591a\u7c92\u5ea6\u9501\u5b9a\uff0c\u5141\u8bb8\u884c\u9501\u548c\u8868\u9501\u5171\u5b58\uff0c\u4e3a\u4e86\u5feb\u901f\u7684\u5224\u65ad\u8868\u4e2d\u662f\u5426\u5b58\u5728\u884c\u9501\uff0cInnoDB \u63a8\u51fa\u4e86\u610f\u5411\u9501\u3002<\/p>\n\n\n\n
                        \u610f\u5411\u9501\uff0cIntention lock\uff0c\u5b83\u662f\u4e00\u79cd\u8868\u9501\uff0c\u7528\u6765\u6807\u8bc6\u4e8b\u52a1\u6253\u7b97\u5728\u8868\u4e2d\u7684\u884c\u4e0a\u83b7\u53d6\u4ec0\u4e48\u7c7b\u578b\u7684\u9501\u3002\u4e0d\u540c\u7684\u4e8b\u52a1\u53ef\u4ee5\u5728\u540c\u4e00\u5f20\u8868\u4e0a\u83b7\u53d6\u4e0d\u540c\u79cd\u7c7b\u7684\u610f\u5411\u9501\uff0c\u4f46\u662f\u7b2c\u4e00\u4e2a\u83b7\u53d6\u8868\u4e0a\u610f\u5411\u6392\u4ed6(IX) \u9501\u7684\u4e8b\u52a1\u4f1a\u963b\u6b62\u5176\u5b83\u4e8b\u52a1\u83b7\u53d6\u8be5\u8868\u4e0a\u7684\u4efb\u4f55 S \u9501 \u6216 X \u9501\u3002\u53cd\u4e4b\uff0c\u7b2c\u4e00\u4e2a\u83b7\u5f97\u8868\u4e0a\u610f\u5411\u5171\u4eab\u9501(IS) \u7684\u4e8b\u52a1\u53ef\u9632\u6b62\u5176\u5b83\u4e8b\u52a1\u83b7\u53d6\u8be5\u8868\u4e0a\u7684\u4efb\u4f55 X \u9501\u3002<\/p>\n\n\n\n
                        \u610f\u5411\u9501\u901a\u5e38\u6709\u4e24\u79cd\u7c7b\u578b\uff1a<\/p>\n\n\n\n
                          \n
                        1. \u610f\u5411\u5171\u4eab\u9501(IS)\uff0c\u8868\u793a\u4e8b\u52a1\u6253\u7b97\u5728\u8868\u4e2d\u7684\u5404\u4e2a\u884c\u4e0a\u8bbe\u7f6e\u5171\u4eab\u9501\u3002<\/li>\n\n\n\n
                        2. \u610f\u5411\u6392\u4ed6\u9501(IX)\uff0c\u8868\u793a\u4e8b\u52a1\u6253\u7b97\u5bf9\u8868\u4e2d\u7684\u5404\u4e2a\u884c\u8bbe\u7f6e\u6392\u4ed6\u9501\u3002<\/li>\n<\/ol>\n\n\n\n

                          \u610f\u5411\u9501\u662f InnoDB \u81ea\u52a8\u52a0\u4e0a\u7684\uff0c\u52a0\u9501\u65f6\u9075\u4ece\u4e0b\u9762\u4e24\u4e2a\u534f\u8bae\uff1a<\/p>\n\n\n\n
                            \n
                          1. \u4e8b\u52a1\u5728\u83b7\u53d6\u8868\u4e2d\u884c\u7684\u5171\u4eab\u9501\u4e4b\u524d\uff0c\u5fc5\u987b\u5148\u83b7\u53d6\u8868\u4e0a\u7684 IS \u9501\u6216\u66f4\u5f3a\u7684\u9501\u3002<\/li>\n\n\n\n
                          2. \u4e8b\u52a1\u5728\u83b7\u53d6\u8868\u4e2d\u884c\u7684\u6392\u4ed6\u9501\u4e4b\u524d\uff0c\u5fc5\u987b\u5148\u83b7\u53d6\u8868\u4e0a\u7684 IX \u9501\u3002<\/li>\n<\/ol>\n\n\n\n
                            \u4e3a\u4e86\u66f4\u597d\u5730\u8bf4\u660e\u610f\u5411\u5171\u4eab\u9501\uff0c\u53ef\u4ee5\u53c2\u7167\u4e0b\u9762\u7684\u987a\u5e8f\u6267\u884c\u6d41\u548c\u5b9e\u4f8b\u56fe\uff1a<\/p>\n\n\n
                            \n
                            \"\"<\/figure><\/div>\n\n
                            \n
                            \"\"<\/figure><\/div>\n\n
                            \n
                            \"\"<\/figure><\/div>\n\n
                            \n
                            \"\"<\/figure><\/div>\n\n\n
                            2.2.4 AUTO-INC \u9501<\/strong><\/p>\n\n\n\n
                            AUTO-INC \u9501\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u8868\u7ea7\u9501\uff0c\u5f53\u8868\u4e2d\u6709 AUTO_INCREMENT \u7684\u5217\u65f6\uff0c\u5982\u679c\u5411\u8fd9\u5f20\u8868\u63d2\u5165\u6570\u636e\u65f6\uff0cInnoDB \u4f1a\u5148\u83b7\u53d6\u8fd9\u5f20\u8868\u7684 AUTO-INC \u9501\uff0c\u7b49\u63d2\u5165\u8bed\u53e5\u6267\u884c\u5b8c\u6210\u540e\uff0cAUTO-INC \u9501\u4f1a\u88ab\u91ca\u653e\u3002<\/p>\n\n\n\n
                            AUTO-INC \u9501\u53ef\u4ee5\u4f7f\u7528 innodb_autoinc_lock_mode \u53d8\u91cf\u6765\u914d\u7f6e\u81ea\u589e\u9501\u7684\u7b97\u6cd5\uff0cinnodb_autoinc_lock_mode \u53d8\u91cf\u53ef\u4ee5\u9009\u62e9\u4e09\u79cd\u503c\u5982\u4e0b\u8868\uff1a<\/p>\n\n\n
                            \n
                            \"\"<\/figure><\/div>\n\n\n
                            \u8868\u7ea7\u9501\u7684\u517c\u5bb9\u6027<\/strong> <\/p>\n\n\n\n
                            \u4e0b\u9762\u7684\u56fe\u8868\u603b\u7ed3\u4e86\u8868\u7ea7\u9501\u7c7b\u578b\u7684\u517c\u5bb9\u6027<\/p>\n\n\n
                            \n
                            \"\"<\/figure><\/div>\n\n\n
                            2.3 \u884c\u9501   <\/strong><\/p>\n\n\n\n
                            \u884c\u9501\u662f\u9488\u5bf9\u6570\u636e\u8868\u4e2d\u884c\u8bb0\u5f55\u7684\u9501\u3002MySQL \u7684\u884c\u9501\u662f\u5728\u5f15\u64ce\u5c42\u5b9e\u73b0\u7684\uff0c\u5e76\u4e0d\u662f\u6240\u6709\u7684\u5f15\u64ce\u90fd\u652f\u6301\u884c\u9501\uff0c\u6bd4\u5982\uff0cInnoDB \u5f15\u64ce\u652f\u6301\u884c\u9501\u800c MyISAM \u5f15\u64ce\u4e0d\u652f\u6301\u3002<\/p>\n\n\n\n
                            InnoDB \u5f15\u64ce\u7684\u884c\u9501\u4e3b\u8981\u6709\u56db\u7c7b\uff1a<\/p>\n\n\n\n
                              \n
                            1. Record Lock\uff1a\u8bb0\u5f55\u9501\uff0c\u662f\u5728\u7d22\u5f15\u8bb0\u5f55\u4e0a\u52a0\u9501\uff1b<\/li>\n\n\n\n
                            2. Gap Lock\uff1a\u95f4\u9699\u9501\uff0c\u9501\u5b9a\u4e00\u4e2a\u8303\u56f4\uff0c\u4f46\u4e0d\u5305\u542b\u8bb0\u5f55\uff1b<\/li>\n\n\n\n
                            3. Next-key Lock\uff1aGap Lock + Record Lock\uff0c\u9501\u5b9a\u4e00\u4e2a\u8303\u56f4(Gap Lock \u5b9e\u73b0)\uff0c\u5e76\u4e14\u9501\u5b9a\u8bb0\u5f55\u672c\u8eab(Record Lock \u5b9e\u73b0)\uff1b<\/li>\n\n\n\n
                            4. \u63d2\u5165\u610f\u5411\u9501\uff1b<\/li>\n<\/ol>\n\n\n\n
                              2.3.1 Record Lock<\/strong><\/p>\n\n\n\n
                              Record Lock\uff1a\u8bb0\u5f55\u9501\uff0c\u662f\u9488\u5bf9\u7d22\u5f15\u8bb0\u5f55\u7684\u9501\uff0c\u9501\u5b9a\u7684\u603b\u662f\u7d22\u5f15\u8bb0\u5f55\u3002<\/p>\n\n\n\n
                              \u4f8b\u5982\uff0cselect id from user where id = 1 for update; for update \u5c31\u663e\u5f0f\u5728\u7d22\u5f15 id \u4e0a\u52a0\u884c\u9501(\u6392\u4ed6\u9501)\uff0c\u9632\u6b62\u5176\u5b83\u4efb\u4f55\u4e8b\u52a1 update \u6216 delete id=1 \u7684\u884c\uff0c\u4f46\u662f\u5bf9 user \u8868\u7684 insert\u3001alter\u3001drop \u64cd\u4f5c\u8fd8\u662f\u53ef\u4ee5\u6b63\u5e38\u6267\u884c\u3002<\/p>\n\n\n\n
                              \u4e3a\u4e86\u66f4\u597d\u7684\u8bf4\u660e Record Lock \u9501\uff0c\u53ef\u4ee5\u53c2\u7167\u4e0b\u9762\u7684\u6267\u884c\u987a\u5e8f\u6d41\u548c\u5b9e\u4f8b\u56fe\uff1a<\/p>\n\n\n
                              \n
                              \"\"<\/figure><\/div>\n\n
                              \n
                              \"\"<\/figure><\/div>\n\n\n
                              2.3.2 Gap Lock<\/strong> <\/p>\n\n\n\n
                              Gap Lock\uff1a\u95f4\u9699\u9501\uff0c\u9501\u4f4f\u4e24\u4e2a\u7d22\u5f15\u8bb0\u5f55\u4e4b\u95f4\u7684\u95f4\u9699\u4e0a\uff0c\u7531 InnoDB \u9690\u5f0f\u6dfb\u52a0\u3002\u6bd4\u5982(1,3) \u8868\u793a\u9501\u4f4f\u8bb0\u5f55 1 \u548c\u8bb0\u5f55 3 \u4e4b\u95f4\u7684\u95f4\u9699\uff0c\u8fd9\u6837\u8bb0\u5f55 2 \u5c31\u65e0\u6cd5\u63d2\u5165\uff0c\u95f4\u9699\u53ef\u80fd\u8de8\u8d8a\u5355\u4e2a\u7d22\u5f15\u503c\u3001\u591a\u4e2a\u7d22\u5f15\u503c\uff0c\u751a\u81f3\u662f\u7a7a\u3002<\/p>\n\n\n
                              \n
                              \"\"<\/figure><\/div>\n\n\n
                              \u4e3a\u4e86\u66f4\u597d\u7684\u8bf4\u660e Gap Lock \u95f4\u9699\u9501\uff0c\u53ef\u4ee5\u53c2\u7167\u4e0b\u9762\u7684\u987a\u5e8f\u6267\u884c\u6d41\u548c\u5b9e\u4f8b\u56fe\uff1a<\/p>\n\n\n
                              \n
                              \"\"<\/figure><\/div>\n\n
                              \n
                              \"\"<\/figure><\/div>\n\n\n
                              \u4e0a\u56fe\u4e2d\uff0c\u4e8b\u52a1 A(sessionA)\u5728\u52a0\u5171\u4eab\u9501\u7684\u65f6\u5019\u4ea7\u751f\u4e86\u95f4\u9699\u9501(Gap Lock)\uff0c\u4e8b\u52a1 B(sessionB)\u5bf9\u95f4\u9699\u4e2d\u8fdb\u884c insert\/update \u64cd\u4f5c\uff0c\u9700\u8981\u5148\u83b7\u53d6\u6392\u4ed6\u9501(X)\uff0c\u5bfc\u81f4\u963b\u585e\u3002\u4e8b\u52a1 C(sessionC)\u901a\u8fc7”show engine innodb status\\G” \u6307\u4ee4\u53ef\u4ee5\u67e5\u770b\u5230\u95f4\u9699\u9501\u7684\u5b58\u5728\u3002\u9700\u8981\u8bf4\u660e\u7684\uff0c\u95f4\u9699\u9501\u53ea\u662f\u9501\u4f4f\u95f4\u9699\u5185\u90e8\u7684\u8303\u56f4\uff0c\u5728\u95f4\u9699\u5916\u7684 insert\/update \u64cd\u4f5c\u4e0d\u4f1a\u53d7\u5f71\u54cd\u3002<\/p>\n\n\n\n
                              Gap Lock \u9501\uff0c\u53ea\u5b58\u5728\u4e8e\u53ef\u91cd\u590d\u8bfb\u9694\u79bb\u7ea7\u522b\uff0c\u76ee\u7684\u662f\u4e3a\u4e86\u89e3\u51b3\u53ef\u91cd\u590d\u8bfb\u9694\u79bb\u7ea7\u522b\u4e0b\u5e7b\u8bfb\u7684\u73b0\u8c61\u3002<\/p>\n\n\n\n
                              2.3.3 Next-Key Lock<\/strong> <\/p>\n\n\n\n
                              Next-Key \u9501\uff0c\u79f0\u4e3a\u4e34\u952e\u9501\uff0c\u5b83\u662f Record Lock + Gap Lock \u7684\u7ec4\u5408\uff0c\u7528\u6765\u9501\u5b9a\u4e00\u4e2a\u8303\u56f4\uff0c\u5e76\u4e14\u9501\u5b9a\u8bb0\u5f55\u672c\u8eab\u9501\uff0c\u5b83\u662f\u4e00\u79cd\u5de6\u5f00\u53f3\u95ed\u7684\u8303\u56f4\uff0c\u53ef\u4ee5\u7528\u7b26\u53f7\u8868\u793a\u4e3a\uff1a(a,b]\u3002<\/p>\n\n\n
                              \n
                              \"\"<\/figure><\/div>\n\n\n
                              \u4e3a\u4e86\u66f4\u597d\u7684\u8bf4\u660e Next-Key Lock \u95f4\u9699\u9501\uff0c\u53ef\u4ee5\u53c2\u7167\u4e0b\u9762\u7684\u987a\u5e8f\u6267\u884c\u6d41\u548c\u5b9e\u4f8b\u56fe\uff1a<\/p>\n\n\n
                              \n
                              \"\"<\/figure><\/div>\n\n
                              \n
                              \"\"<\/figure><\/div>\n\n\n
                              \u4e0a\u56fe\u4e2d\uff0c\u4e8b\u52a1 A(sessionA)\u5728\u52a0\u5171\u4eab\u9501\u7684\u65f6\u5019\u4ea7\u751f\u4e86\u95f4\u9699\u9501(Gap Lock)\uff0c\u4e8b\u52a1 B(sessionB)\u5bf9\u95f4\u9699\u4e2d\u8fdb\u884c insert \u64cd\u4f5c\uff0c\u9700\u8981\u5148\u83b7\u53d6\u6392\u4ed6\u9501(X)\uff0c\u5bfc\u81f4\u963b\u585e\u3002\u4e8b\u52a1 C(sessionC)\u5bf9\u95f4\u9699\u4e2d\u8fdb\u884c update \u64cd\u4f5c\uff0c\u9700\u8981\u5148\u83b7\u53d6\u6392\u4ed6\u9501(X)\uff0c\u5bfc\u81f4\u963b\u585e\u3002\u4e8b\u52a1 D(sessionD)\u901a\u8fc7”show engine innodb status\\G” \u6307\u4ee4\u53ef\u4ee5\u67e5\u770b\u5230\u95f4\u9699\u9501\u7684\u5b58\u5728\u3002\u9700\u8981\u8bf4\u660e\u7684\uff0c\u95f4\u9699\u9501\u53ea\u662f\u9501\u4f4f\u95f4\u9699\u5185\u90e8\u7684\u8303\u56f4\uff0c\u5728\u95f4\u9699\u5916\u7684 insert\/update \u64cd\u4f5c\u4e0d\u4f1a\u53d7\u5f71\u54cd\u3002<\/p>\n\n\n\n
                              2.3.4 Insert Intention Lock<\/strong>   <\/p>\n\n\n\n
                              \u63d2\u5165\u610f\u5411\u9501\uff0c\u5b83\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u95f4\u9699\u9501\uff0c\u7279\u6307\u63d2\u5165\u64cd\u4f5c\u4ea7\u751f\u7684\u95f4\u9699\u9501\u3002\u4e3a\u4e86\u66f4\u597d\u7684\u8bf4\u660e Insert Intention Lock \u9501\uff0c\u53ef\u4ee5\u53c2\u7167\u4e0b\u9762\u7684\u987a\u5e8f\u6267\u884c\u6d41\u548c\u5b9e\u4f8b\u56fe\uff1a<\/p>\n\n\n
                              \n
                              \"\"<\/figure><\/div>\n\n
                              \n
                              \"\"<\/figure><\/div>\n\n\n
                              \u4e09\u3001\u4e50\u89c2\u9501\u00a0&\u00a0\u60b2\u89c2\u9501<\/strong>\u00a0 \u00a0<\/p>\n\n\n\n
                              \n\n\n\n
                              \u5728 MySQL \u4e2d\uff0c\u65e0\u8bba\u662f\u60b2\u89c2\u9501\u8fd8\u662f\u4e50\u89c2\u9501\uff0c\u90fd\u662f\u4eba\u4eec\u5bf9\u6982\u5ff5\u7684\u4e00\u79cd\u601d\u60f3\u62bd\u8c61\uff0c\u5b83\u4eec\u672c\u8eab\u8fd8\u662f\u5229\u7528 MySQL \u63d0\u4f9b\u7684\u9501\u673a\u5236\u6765\u5b9e\u73b0\u7684\u3002\u5176\u5b9e\uff0c\u9664\u4e86\u5728 MySQL \u6570\u636e\uff0c\u50cf Java \u8bed\u8a00\u91cc\u9762\u4e5f\u6709\u4e50\u89c2\u9501\u548c\u60b2\u89c2\u9501\u7684\u6982\u5ff5\u3002<\/p>\n\n\n\n
                                \n
                              • \u60b2\u89c2\u9501\uff0c\u53ef\u4ee5\u7406\u89e3\u6210\uff1a\u5728\u5bf9\u4efb\u610f\u8bb0\u5f55\u8fdb\u884c\u4fee\u6539\u524d\uff0c\u5148\u5c1d\u8bd5\u4e3a\u8be5\u8bb0\u5f55\u52a0\u4e0a\u6392\u4ed6\u9501(exclusive locking)\uff0c\u91c7\u7528\u7684\u662f\u5148\u83b7\u53d6\u9501\u518d\u64cd\u4f5c\u6570\u636e\u7684\u7b56\u7565\uff0c\u53ef\u80fd\u4f1a\u4ea7\u751f\u6b7b\u9501\uff1b<\/li>\n\n\n\n
                              • \u4e50\u89c2\u9501\uff0c\u662f\u76f8\u5bf9\u60b2\u89c2\u9501\u800c\u8a00\uff0c\u4e00\u822c\u4e0d\u4f1a\u5229\u7528\u6570\u636e\u5e93\u7684\u9501\u673a\u5236\uff0c\u800c\u662f\u91c7\u7528\u7c7b\u4f3c\u7248\u672c\u53f7\u6bd4\u8f83\u4e4b\u7c7b\u7684\u64cd\u4f5c\uff0c\u56e0\u6b64\u4e50\u89c2\u9501\u4e0d\u4f1a\u4ea7\u751f\u6b7b\u9501\u7684\u95ee\u9898\uff1b<\/li>\n<\/ul>\n\n\n\n
                                \u56db\u3001\u6b7b\u9501\u00a0& \u6b7b\u9501\u68c0\u6d4b<\/strong>\u00a0 \u00a0<\/p>\n\n\n\n
                                \n\n\n\n
                                \u5f53\u5e76\u53d1\u7cfb\u7edf\u4e2d\u4e0d\u540c\u7ebf\u7a0b\u51fa\u73b0\u5faa\u73af\u8d44\u6e90\u4f9d\u8d56\uff0c\u6d89\u53ca\u7684\u7ebf\u7a0b\u90fd\u5728\u7b49\u5f85\u522b\u7684\u7ebf\u7a0b\u91ca\u653e\u8d44\u6e90\u65f6\uff0c\u5c31\u4f1a\u5bfc\u81f4\u8fd9\u51e0\u4e2a\u7ebf\u7a0b\u90fd\u8fdb\u5165\u65e0\u9650\u7b49\u5f85\u7684\u72b6\u6001\uff0c\u79f0\u4e3a\u6b7b\u9501\u3002\u53ef\u4ee5\u901a\u8fc7\u4e0b\u9762\u7684\u6307\u4ee4\u67e5\u770b\u6b7b\u9501\uff1a<\/p>\n\n\n\n
                                show engine innodb status<\/pre>\n\n\n\n
                                \u5f53\u51fa\u73b0\u6b7b\u9501\u4ee5\u540e\uff0c\u6709\u4e24\u79cd\u7b56\u7565\uff1a<\/p>\n\n\n\n
                                  \n
                                1. \u76f4\u63a5\u8fdb\u5165\u7b49\u5f85\uff0c\u76f4\u5230\u8d85\u65f6\u3002\u8fd9\u4e2a\u8d85\u65f6\u65f6\u95f4\u53ef\u4ee5\u901a\u8fc7\u53c2\u6570 innodb_lock_wait_timeout \u6765\u8bbe\u7f6e\uff0cInnoDB \u4e2d innodb_lock_wait_timeout \u7684\u9ed8\u8ba4\u503c\u662f 50s\u3002<\/li>\n\n\n\n
                                2. \u53d1\u8d77\u6b7b\u9501\u68c0\u6d4b\uff0c\u53d1\u73b0\u6b7b\u9501\u540e\uff0c\u4e3b\u52a8\u56de\u6eda\u6b7b\u9501\u94fe\u6761\u4e2d\u7684\u67d0\u4e00\u4e2a\u4e8b\u52a1\uff0c\u8ba9\u5176\u5b83\u4e8b\u52a1\u5f97\u4ee5\u7ee7\u7eed\u6267\u884c\u3002\u5c06\u53c2\u6570 innodb_deadlock_detect \u8bbe\u7f6e\u4e3a on\uff0c\u8868\u793a\u5f00\u542f\u6b7b\u9501\u68c0\u6d4b\u3002<\/li>\n<\/ol>\n\n\n\n
                                  \u4e94\u3001\u603b\u7ed3<\/strong>\u00a0 \u00a0<\/p>\n\n\n\n
                                  \n\n\n\n
                                  \u672c\u6587\u57fa\u4e8e MySQL 8.0.30 \u7248\u672c\u548c InnoDB \u5f15\u64ce\uff0c\u5bf9 MySQL \u4e2d\u7684\u9501\u8fdb\u884c\u4e86\u8bb2\u89e3\uff0c\u6bcf\u79cd\u9501\u90fd\u6709\u5176\u7279\u5b9a\u7684\u4f7f\u7528\u573a\u666f\u3002\u4f5c\u4e3a\u7ecf\u5e38\u548c MySQL \u6253\u4ea4\u9053\u7684 Java \u7a0b\u5e8f\u5458\u6765\u8bf4\uff0c\u5bf9 MySQL \u9501\u4e86\u89e3\u7684\u8d8a\u6df1\uff0c\u8d8a\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u66f4\u597d\u7684\u53bb\u5199\u51fa\u9ad8\u6027\u80fd\u7684 SQL \u8bed\u53e5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                                  \u8f6c\u8f7d\uff1a\u809d\u4e86\u4e00\u5468\uff0c\u8fd9\u4e0b\u5f7b\u5e95\u628a MySQL\u7684\u9501\u641e\u61c2\u4e86 \u7533\u660e\uff1a\u672c\u6587\u57fa\u4e8e MySQL 8.0.30 \u7248\u672c\uff0cInnoDB […]<\/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\/15768"}],"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=15768"}],"version-history":[{"count":1,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/15768\/revisions"}],"predecessor-version":[{"id":15819,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/15768\/revisions\/15819"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=15768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}