{"id":17169,"date":"2025-04-24T08:53:07","date_gmt":"2025-04-24T00:53:07","guid":{"rendered":"https:\/\/92it.top\/?p=17169"},"modified":"2025-04-24T08:53:34","modified_gmt":"2025-04-24T00:53:34","slug":"mysql%e6%95%b0%e6%8d%ae%e5%ba%93%e9%94%81%ef%bc%9arecord-lock%ef%bc%8c-gap-lock-%e5%92%8c-next-key-lock","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=17169","title":{"rendered":"MySQL\u6570\u636e\u5e93\u9501\uff1aRecord Lock\uff0c Gap Lock \u548c Next-Key Lock"},"content":{"rendered":"\n

\u8f6c\u8f7d\uff1aMySQL\u6570\u636e\u5e93\u9501\uff1aRecord Lock\uff0c Gap Lock \u548c Next-Key Lock<\/a><\/p>\n\n\n\n

InnoDB\u5f15\u64ce \u5728 \u5171\u4eab\u9501\u548c\u6392\u4ed6\u9501 \u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u8be6\u7ec6\u5206\u6790\u4e86\u5171\u4eab\u9501\u548c\u6392\u4ed6\u9501\u5728MySQL<\/code>\u4e2d\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff0c\u4eca\u5929\uff0c\u6211\u4eec\u63a5\u7740\u5206\u6790InnoDB<\/code>\u5f15\u64ce\u7684 3\u79cd\u884c\u9501\u3002<\/p>\n\n\n\n

\u5728MySQL<\/code>\u7684InnoDB<\/code>\u5f15\u64ce\u7684\u884c\u9501\u4e3b\u8981\u6709\u4e09\u7c7b\uff1a<\/p>\n\n\n\n

    \n
  1. Record Lock<\/code>\uff1a\u8bb0\u5f55\u9501\uff0c\u662f\u5728\u7d22\u5f15\u8bb0\u5f55\u4e0a\u52a0\u9501\uff1b<\/li>\n\n\n\n
  2. Gap Lock<\/code>\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<\/code>\uff1aNext-key Lock = Gap Lock + Record Lock<\/code>\uff0c\u5b83\u9501\u5b9a\u4e86\u4e00\u4e2a\u8303\u56f4(Gap Lock\u5b9e\u73b0)\uff0c\u5e76\u4e14\u9501\u5b9a\u8bb0\u5f55\u672c\u8eab(Record Lock\u5b9e\u73b0)\uff1b<\/li>\n<\/ol>\n\n\n\n

    Record Lock<\/strong><\/p>\n\n\n\n

    \n\n\n\n

    \u4ec0\u4e48\u662f Record Lock\uff1f<\/strong><\/p>\n\n\n\n

    Record Lock<\/code>\uff0c\u8bb0\u5f55\u9501\uff0c\u5b83\u662f\u9488\u5bf9\u7d22\u5f15\u8bb0\u5f55\u7684\u9501\uff0c\u9501\u5b9a\u7684\u603b\u662f\u7d22\u5f15\u8bb0\u5f55\u3002\u5728\u591a\u7528\u6237\u6570\u636e\u5e93\u7cfb\u7edf\u4e2d\uff0c\u591a\u4e2a\u4e8b\u52a1\u53ef\u80fd\u4f1a\u540c\u65f6\u5c1d\u8bd5\u8bfb\u53d6\u6216\u4fee\u6539\u540c\u4e00\u6761\u8bb0\u5f55\uff0cRecord Lock<\/code>\u786e\u4fdd\u53ea\u6709\u4e00\u4e2a\u4e8b\u52a1\u80fd\u5728\u67d0\u4e00\u65f6\u523b\u4fee\u6539\u8be5\u8bb0\u5f55\uff0c\u5176\u4ed6\u4e8b\u52a1\u53ea\u80fd\u8bfb\u53d6\uff0c\u6216\u8005\u5728\u5199\u9501\u91ca\u653e\u540e\u518d\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n\n\n\n

    \u4e3e\u4f8b\u8bf4\u660e<\/strong><\/p>\n\n\n\n

    \u4e3a\u4e86\u66f4\u597d\u7684\u8bf4\u660eRecord Lock<\/code>\uff0c\u6211\u4eec\u4ee5\u4e0b\u9762\u7684\u987a\u5e8f\u6267\u884c\u6d41\u6765\u8fdb\u884c\u9a8c\u8bc1\uff1a<\/p>\n\n\n

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

    \u793a\u4f8b\u6267\u884c\u7ed3\u679c\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n

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

    \u901a\u8fc7\u4e0a\u9762\u7684\u793a\u4f8b\u53ef\u4ee5\u770b\u51fa\uff1a<\/p>\n\n\n\n

      \n
    • \u4e8b\u52a1A\uff08sessionA\uff09\u5bf9id=1<\/code>\u52a0\u6392\u4ed6\u9501\u4e4b\u540e\u4ea7\u751f\u4e86\u8bb0\u5f55\u9501<\/li>\n\n\n\n
    • \u4e8b\u52a1B\uff08sessionB\uff09\u5bf9id=1<\/code>\u7684update<\/code>\u64cd\u4f5c\u88ab\u963b\u585e\u4e86<\/li>\n\n\n\n
    • \u4e8b\u52a1C\uff08sessionC\uff09\u53ef\u4ee5\u67e5\u770b\u5230Record Lock<\/code><\/li>\n<\/ul>\n\n\n\n

      Gap Lock<\/strong><\/p>\n\n\n\n

      \n\n\n\n

      \u4ec0\u4e48\u662fGap Lock\uff1f<\/strong><\/p>\n\n\n\n

      Gap Lock<\/code>\uff0c\u95f4\u9699\u9501\uff0c\u5b83\u662f\u4e00\u79cd\u884c\u7ea7\u9501\uff0c\u9501\u4f4f\u4e24\u4e2a\u7d22\u5f15\u8bb0\u5f55\u4e4b\u95f4\u7684\u95f4\u9699<\/code>\uff0c\u800c\u4e0d\u662f\u5b9e\u9645\u7684\u6570\u636e\u8bb0\u5f55\uff0c\u7531InnoDB<\/code>\u9690\u5f0f\u6dfb\u52a0\u3002<\/p>\n\n\n\n

      \u5982\u4e0b\u56fe\uff1a(1,3) \u8868\u793a\u9501\u4f4f\u8bb0\u5f551 \u548c\u8bb0\u5f553 \u4e4b\u95f4\u7684\u95f4\u9699\uff0c\u8fd9\u6837\u8bb0\u5f552 \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

      \u4e3e\u4f8b\u8bf4\u660e<\/strong><\/p>\n\n\n\n

      \u4e3a\u4e86\u66f4\u597d\u7684\u8bf4\u660eGap Lock<\/code>\u95f4\u9699\u9501\uff0c\u6211\u4eec\u4ee5\u4e0b\u9762\u7684\u987a\u5e8f\u6267\u884c\u6d41\u6765\u8fdb\u884c\u9a8c\u8bc1\uff1a<\/p>\n\n\n

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

      \u793a\u4f8b\u6267\u884c\u7ed3\u679c\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n

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

      \u901a\u8fc7\u4e0a\u9762\u7684\u793a\u4f8b\u6267\u884c\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff1a<\/p>\n\n\n\n

        \n
      • \u4e8b\u52a1A(sessionA)\u5728\u52a0\u5171\u4eab\u9501\u7684\u65f6\u5019\u4ea7\u751f\u4e86\u95f4\u9699\u9501(Gap Lock)<\/li>\n\n\n\n
      • \u4e8b\u52a1B(sessionB)\u5bf9\u95f4\u9699\u4e2d\u8fdb\u884cinsert\/update<\/code>\u64cd\u4f5c\uff0c\u9700\u8981\u5148\u83b7\u53d6\u6392\u4ed6\u9501(X)\uff0c\u5bfc\u81f4\u963b\u585e<\/li>\n\n\n\n
      • \u4e8b\u52a1C(sessionC)\u901a\u8fc7show engine innodb status\\G<\/code>\u6307\u4ee4\u53ef\u4ee5\u67e5\u770b\u5230\u95f4\u9699\u9501\u7684\u5b58\u5728\u3002<\/li>\n<\/ul>\n\n\n\n

        \u9700\u8981\u8bf4\u660e\uff0c\u95f4\u9699\u9501\u53ea\u662f\u9501\u4f4f\u95f4\u9699\u5185\u90e8\u7684\u8303\u56f4\uff0c\u5728\u95f4\u9699\u5916\u7684insert\/update<\/code>\u64cd\u4f5c\u4e0d\u4f1a\u53d7\u5f71\u54cd\u3002<\/p>\n\n\n\n

        Next-Key Lock<\/strong><\/p>\n\n\n\n

        \n\n\n\n

        \u4ec0\u4e48\u662fNext-Key Lock\uff1f<\/strong><\/p>\n\n\n\n

        Next-Key Lock<\/code>\uff0c\u79f0\u4e3a\u4e34\u952e\u9501\uff0c\u5b83\u662fRecord Lock + Gap Lock<\/code>\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\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n

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

        \u4e3e\u4f8b\u8bf4\u660e<\/strong><\/p>\n\n\n\n

        \u4e3a\u4e86\u66f4\u597d\u7684\u8bf4\u660eNext-Key Lock<\/code>\uff0c\u6211\u4eec\u4ee5\u4e0b\u9762\u7684\u987a\u5e8f\u6267\u884c\u6d41\u6765\u8fdb\u884c\u9a8c\u8bc1\uff1a<\/p>\n\n\n

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

        \u793a\u4f8b\u6267\u884c\u7ed3\u679c\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n

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

        \u901a\u8fc7\u4e0a\u9762\u7684\u793a\u4f8b\u6267\u884c\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff1a<\/p>\n\n\n\n

          \n
        • \u4e8b\u52a1A(sessionA)\u5728\u52a0\u5171\u4eab\u9501\u7684\u65f6\u5019\u4ea7\u751f\u4e86\u95f4\u9699\u9501(Gap Lock)<\/li>\n\n\n\n
        • \u4e8b\u52a1B(sessionB)\u5bf9\u95f4\u9699\u4e2d\u8fdb\u884cinsert<\/code>\u64cd\u4f5c\uff0c\u9700\u8981\u5148\u83b7\u53d6\u6392\u4ed6\u9501(X)\uff0c\u5bfc\u81f4\u963b\u585e\u3002<\/li>\n\n\n\n
        • \u4e8b\u52a1C(sessionC)\u5bf9\u95f4\u9699\u4e2d\u8fdb\u884cupdate<\/code>\u64cd\u4f5c\uff0c\u9700\u8981\u5148\u83b7\u53d6\u6392\u4ed6\u9501(X)\uff0c\u5bfc\u81f4\u963b\u585e\u3002<\/li>\n\n\n\n
        • \u4e8b\u52a1D(sessionD)\u901a\u8fc7show engine innodb status\\G<\/code>\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\u7684insert\/update<\/code>\u64cd\u4f5c\u4e0d\u4f1a\u53d7\u5f71\u54cd\u3002<\/li>\n<\/ul>\n\n\n\n

          \u603b\u7ed3<\/strong><\/p>\n\n\n\n

          \n\n\n\n

          Record Lock<\/code>\uff0cGap Lock<\/code>\u548cGap Lock<\/code> 3\u79cd\u9501\u662f\u5b58\u5728MySQL<\/code>\u7684InnoDB<\/code>\u5f15\u64ce\u7684\u884c\u9501\uff0cMyISAM\u5f15\u64ce\u6ca1\u6709\uff1a<\/p>\n\n\n\n

            \n
          1. Record Lock<\/code>\uff1a\u8bb0\u5f55\u9501\uff0c\u662f\u5728\u7d22\u5f15\u8bb0\u5f55\u4e0a\u52a0\u9501\uff1b<\/li>\n\n\n\n
          2. Gap Lock<\/code>\uff1a\u95f4\u9699\u9501\uff0c\u9501\u5b9a\u4e00\u4e2a\u8303\u56f4\uff0c\u4f46\u4e0d\u5305\u542b\u8bb0\u5f55\uff0c\u5373(A,B)<\/code>\uff1b<\/li>\n\n\n\n
          3. Next-key Lock<\/code>\uff1aNext-key Lock = Gap Lock + Record Lock<\/code>\uff0c\u5b83\u9501\u5b9a\u4e86\u4e00\u4e2a\u8303\u56f4(Gap Lock\u5b9e\u73b0)\uff0c\u5e76\u4e14\u9501\u5b9a\u8bb0\u5f55\u672c\u8eab(Record Lock\u5b9e\u73b0)\uff0c\u5373(A,B]<\/code>\uff1b\uff1b<\/li>\n<\/ol>\n\n\n\n

            \u8fd9 3\u79cd\u9501\u90fd\u662fInnoDB<\/code>\u5f15\u64ce\u9690\u5f0f\u6dfb\u52a0\u7684\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","protected":false},"excerpt":{"rendered":"

            \u8f6c\u8f7d\uff1aMySQL\u6570\u636e\u5e93\u9501\uff1aRecord Lock\uff0c Gap Lock \u548c Next-Key Lock Inno […]<\/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\/17169"}],"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=17169"}],"version-history":[{"count":3,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/17169\/revisions"}],"predecessor-version":[{"id":17180,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/17169\/revisions\/17180"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=17169"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17169"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17169"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}