{"id":84041,"date":"2026-07-26T07:49:08","date_gmt":"2026-07-25T23:49:08","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/84041.html"},"modified":"2026-07-26T07:49:08","modified_gmt":"2026-07-25T23:49:08","slug":"mysql-%e5%ba%95%e5%b1%82%e6%89%a7%e8%a1%8c%e5%8e%9f%e7%90%86%e4%b8%8e%e5%ae%9e%e7%8e%b0%e5%8e%86%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/84041.html","title":{"rendered":"MySQL \u5e95\u5c42\u6267\u884c\u539f\u7406\u4e0e\u5b9e\u73b0\u5386\u7a0b"},"content":{"rendered":"

\u672c\u6587\u5b8c\u6574\u68b3\u7406\u4e00\u6761 UPDATE \u5728 MySQL \u4e2d\u7684\u6267\u884c\u94fe\u8def（\u8fde\u63a5\u6c60 \u2192 Server \u5c42 \u2192 InnoDB \u5185\u5b58 \u2192 Undo \/ Redo \/ Binlog \u2192 \u5f02\u6b65\u843d\u76d8），\u4ee5\u53ca MySQL \u4e0e InnoDB \u7684\u6f14\u8fdb\u5386\u7a0b\u3002\u7406\u89e3\u8fd9\u6761\u94fe\u8def，\u662f\u56de\u7b54\u4e24\u4e2a\u95ee\u9898\u7684\u57fa\u7840：\u4e8b\u52a1\u63d0\u4ea4\u540e\u6570\u636e\u4e3a\u4ec0\u4e48\u4e0d\u4f1a\u4e22？\u4ee5\u53ca\u5d29\u6e83\u6062\u590d\u4f9d\u8d56\u4ec0\u4e48\u673a\u5236？<\/p>\n

\u4e00\u3001\u8fde\u63a5\u6c60\u8ba9\u9ad8\u5e76\u53d1\u4e0b\u4e0d\u80fd\u6bcf\u6b21\u90fd\u5efa\u8fde<\/h3>\n

\u4efb\u4f55 SQL \u7684\u7b2c\u4e00\u6b65\u90fd\u662f\u5efa\u7acb\u8fde\u63a5\u3002\u8fde\u63a5\u662f\u7a00\u7f3a\u4e14\u6602\u8d35\u7684\u8d44\u6e90，\u9ad8\u5e76\u53d1\u4e0b\u8ba9\u4e1a\u52a1\u7ebf\u7a0b\u5404\u81ea\u5f00\u5173\u8fde\u63a5\u4f1a\u9020\u6210\u5de8\u5927\u5f00\u9500\u3002\u672c\u8282\u8bf4\u660e\u8fde\u63a5\u6c60\u4e3a\u4f55\u662f\u5fc5\u9009\u9879\u3002<\/p>\n

Java \u5e94\u7528\u901a\u8fc7 JDBC \u9a71\u52a8\u628a SQL \u53d1\u5f80 MySQL\u3002\u4e00\u4e2a\u8fd0\u884c\u5728 Tomcat \u4e2d\u7684 Web \u7cfb\u7edf，\u591a\u4e2a\u7ebf\u7a0b\u5e76\u53d1\u5904\u7406\u8bf7\u6c42；\u82e5\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u8d70"\u5efa\u8fde\u63a5 \u2192 \u6267\u884c \u2192 \u65ad\u8fde\u63a5"，\u9ad8\u5e76\u53d1\u4e0b\u8fde\u63a5\u7684\u9891\u7e41\u521b\u5efa\u4e0e\u9500\u6bc1\u4f1a\u8ba9\u63e1\u624b\u4e0e\u9274\u6743\u5f00\u9500\u88ab\u663e\u8457\u653e\u5927\u3002<\/p>\n

MySQL \u4e0e\u5e94\u7528\u4e24\u4fa7\u90fd\u4f9d\u8d56\u8fde\u63a5\u6c60：\u9884\u5148\u5efa\u7acb\u4e00\u7ec4\u8fde\u63a5，\u7ebf\u7a0b\u6309\u9700\u53d6\u7528\u3001\u7528\u5b8c\u5f52\u8fd8\u3002\u5b83\u5e26\u6765\u4e09\u70b9\u6536\u76ca：\u8fde\u63a5\u590d\u7528\u7701\u53bb\u53cd\u590d\u63e1\u624b；\u8fde\u63a5\u6570\u53ef\u63a7，\u907f\u514d\u62d6\u57ae\u6570\u636e\u5e93\u8d44\u6e90；\u7ba1\u7406\u7b80\u5316，\u65e0\u9700\u5728\u4e1a\u52a1\u4ee3\u7801\u91cc\u624b\u52a8\u5f00\u5173\u8fde\u63a5\u3002\u5e38\u89c1\u7684\u670d\u52a1\u7aef\u8fde\u63a5\u6c60\u914d\u7f6e\u96c6\u4e2d\u5728 max_connections\u3001wait_timeout\u3001interactive_timeout，\u5e94\u7528\u4fa7\u5219\u4f9d\u8d56 HikariCP\u3001Druid \u7b49\u5b9e\u73b0\u3002<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\u8fde\u63a5\u5c31\u7eea\u540e，\u8bf7\u6c42\u8fdb\u5165 Server \u5c42，\u770b\u5b83\u5982\u4f55\u6d88\u5316\u8fd9\u6761 SQL\u3002<\/p>\n

\u4e8c\u3001Server \u5c42\u4e2dSQL \u5982\u4f55\u88ab\u89e3\u6790\u4e0e\u8c03\u5ea6<\/h3>\n

\u8fde\u63a5\u5efa\u7acb\u540e，\u670d\u52a1\u7ebf\u7a0b\u63a5\u7ba1\u8bf7\u6c42\u3002\u672c\u5c42\u4e0d\u78b0\u6570\u636e\u6587\u4ef6，\u53ea\u628a SQL \u7ffb\u8bd1\u6210\u6267\u884c\u65b9\u6848\u4ea4\u7ed9\u5f15\u64ce\u3002<\/p>\n

\u4e00\u6761\u7f51\u7edc\u8bf7\u6c42\u5230\u8fbe MySQL \u540e，\u5904\u7406\u94fe\u8def\u56fa\u5b9a：<\/p>\n

  • \u5206\u914d\u7ebf\u7a0b，\u76d1\u542c\u5e76\u8bfb\u53d6\u8fde\u63a5\u4e2d\u7684 SQL \u8bed\u53e5<\/li>\n
  • SQL Interface \u63a5\u6536\u8be5\u8bed\u53e5<\/li>\n
  • \u89e3\u6790\u5668\u89e3\u6790SQL<\/li>\n
  • \u67e5\u8be2\u4f18\u5316\u5668\u751f\u6210\u67e5\u8be2\u8def\u5f84\u6811，\u9009\u51fa\u4ee3\u4ef7\u6700\u5c0f\u7684\u6267\u884c\u65b9\u6848<\/li>\n
  • \u6267\u884c\u5668\u6309\u6267\u884c\u8ba1\u5212\u8c03\u5ea6<\/li>\n
  • \u5b58\u50a8\u5f15\u64ce（\u9ed8\u8ba4 InnoDB）\u771f\u6b63\u8bfb\u5199\u6570\u636e<\/li>\n

    \u6982\u62ec\u4e3a：\u63a5\u53e3\u63a5\u6536 \u2192\u89e3\u6790\u5668\u89e3\u6790\u2192 \u4f18\u5316\u5668\u9009\u8def \u2192 \u6267\u884c\u5668\u8c03\u5ea6 \u2192 \u5f15\u64ce\u843d\u5730\u3002
    \n\"\u8bf7\u6dfb\u52a0\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u4e00\u70b9\u5386\u53f2\u7ec6\u8282：MySQL 5.7 \u53ca\u4e4b\u524d\u5b58\u5728\u67e5\u8be2\u7f13\u5b58（Query Cache），\u4ee5\u8868\u4e3a\u5355\u4f4d\u7f13\u5b58 SELECT \u7ed3\u679c，\u4f46\u4efb\u610f\u5bf9\u8be5\u8868\u7684\u5199（\u5305\u62ec UPDATE）\u90fd\u4f1a\u8ba9\u6574\u5f20\u8868\u7684\u7f13\u5b58\u5931\u6548，\u5199\u591a\u573a\u666f\u4e0b\u53cd\u800c\u62d6\u7d2f\u6027\u80fd，\u56e0\u6b64\u9ed8\u8ba4\u5173\u95ed；MySQL 8.0 \u5df2\u5f7b\u5e95\u79fb\u9664\u8be5\u529f\u80fd\u3002<\/p>\n

    \u8ba1\u5212\u5b9a\u4e0b\u540e，\u8bfb\u5199\u4ea4\u7ed9\u5b58\u50a8\u5f15\u64ce，InnoDB \u7684\u5185\u5b58\u7ed3\u6784\u81ea\u6b64\u4ecb\u5165\u3002<\/p>\n

    \u4e09\u3001Buffer Pool\u662fInnoDB \u7684\u5185\u5b58\u5fc3\u810f<\/h3>\n

    InnoDB \u8bfb\u5199\u591a\u5148\u53d1\u751f\u5728\u5185\u5b58，Buffer Pool \u662f\u5176\u6027\u80fd\u6838\u5fc3\u3002\u6b63\u56e0\u5185\u5b58\u6613\u5931，\u624d\u5f15\u51fa Undo\u3001Redo \u4e0e\u5237\u76d8\u673a\u5236\u3002\u672c\u8282\u5148\u8bb2\u57fa\u7840，\u518d\u8865 Change Buffer\u3001Double Write \u4e0e\u4e09\u6761\u94fe\u8868\u3002<\/p>\n

    InnoDB \u5c06\u5927\u91cf\u6570\u636e\u9875\u7f13\u5b58\u5728\u5185\u5b58\u7684 Buffer Pool \u4e2d，\u4ee5\u51cf\u5c11\u76f4\u63a5\u8bfb\u78c1\u76d8\u7684\u6b21\u6570\u3002<\/p>\n

    \u4ee5\u5982\u4e0b\u8bed\u53e5\u4e3a\u4f8b：<\/p>\n

    — \u573a\u666f：\u5c06 id=1 \u8fd9\u884c\u7528\u6237\u7684 name \u6539\u4e3a xxx<\/span>
    \nUPDATE<\/span> users SET<\/span> name =<\/span> 'xxx'<\/span> WHERE<\/span> id =<\/span> 1<\/span>;<\/span><\/p>\n

    InnoDB \u4f9d\u6b21\u505a\u4e09\u4ef6\u4e8b：\u68c0\u67e5 id=1 \u6240\u5728\u6570\u636e\u9875\u662f\u5426\u5728 Buffer Pool，\u4e0d\u5728\u5219\u4ece\u78c1\u76d8\u52a0\u8f7d；\u5bf9\u8be5\u884c\u52a0\u72ec\u5360\u9501，\u9632\u6b62\u5e76\u53d1\u4fee\u6539；\u5728\u5185\u5b58\u4e2d\u628a name \u6539\u4e3a xxx\u3002<\/p>\n

    \u6b64\u65f6\u5185\u5b58\u4e2d\u7684\u6570\u636e\u5df2\u4e0e\u78c1\u76d8\u4e0d\u4e00\u81f4，\u79f0\u4e3a"\u810f\u9875"\u3002Buffer Pool \u7528 LRU \u7b97\u6cd5\u7ba1\u7406\u6570\u636e\u9875，\u4fdd\u7559\u70ed\u70b9\u6570\u636e\u5728\u5185\u5b58\u3002\u4e13\u7528\u6570\u636e\u5e93\u670d\u52a1\u5668\u5efa\u8bae\u5c06 innodb_buffer_pool_size \u8bbe\u4e3a\u7269\u7406\u5185\u5b58\u7684 60%~75%，\u7f13\u5b58\u547d\u4e2d\u7387\u76f4\u63a5\u51b3\u5b9a\u67e5\u8be2\u6027\u80fd\u3002<\/p>\n

    Change Buffer：\u975e\u552f\u4e00\u7d22\u5f15\u7684\u66f4\u65b0\u4f18\u5316\u3002 \u5bf9\u4e8e\u975e\u552f\u4e00\u4e8c\u7ea7\u7d22\u5f15\u7684\u6539\u52a8，\u5982\u679c\u76ee\u6807\u6570\u636e\u9875\u4e0d\u5728 Buffer Pool，InnoDB \u4e0d\u4f1a\u7acb\u5373\u628a\u9875\u8bfb\u5165\u5185\u5b58，\u800c\u662f\u5148\u628a\u53d8\u66f4\u8bb0\u5165 Change Buffer，\u7b49\u540e\u7eed\u8be5\u9875\u88ab\u8bfb\u5165\u65f6\u518d\u5408\u5e76（merge）\u3002\u552f\u4e00\u7d22\u5f15\u56e0\u63d2\u5165\u65f6\u5fc5\u987b\u7acb\u5373\u5224\u91cd，\u65e0\u6cd5\u4f7f\u7528 Change Buffer\u3002\u5176\u884c\u4e3a\u7531 innodb_change_buffering \u63a7\u5236（\u9ed8\u8ba4 all，\u5373\u589e\u5220\u6539\u90fd\u7f13\u51b2）\u3002<\/p>\n

    \u810f\u9875\u5237\u76d8\u65f6\u673a\u4e0e Double Write Buffer\u3002 \u810f\u9875\u7531\u540e\u53f0 IO \u7ebf\u7a0b\u5f02\u6b65\u5237\u56de\u78c1\u76d8，\u89e6\u53d1\u6761\u4ef6\u5305\u62ec：Buffer Pool \u7a7a\u95f4\u4e0d\u8db3\u3001Redo Log \u5199\u6ee1\u9700\u8981\u63a8\u8fdb checkpoint\u3001\u540e\u53f0\u5b9a\u671f\u5237\u5199\u3002\u5199\u810f\u9875\u65f6，InnoDB \u5148\u987a\u5e8f\u5199\u5165 Double Write Buffer（\u5185\u5b58 2MB \u52a0 ibdata \u4e2d\u8fde\u7eed 128 \u9875），\u518d\u5199\u771f\u6b63\u7684\u6570\u636e\u6587\u4ef6，\u7528\u4ee5\u9632\u8303"\u90e8\u5206\u5199\u5931\u6548"（16KB \u9875\u5199\u5230\u4e00\u534a\u5b95\u673a\u5bfc\u81f4\u9875\u635f\u574f）；\u5d29\u6e83\u6062\u590d\u65f6\u7528\u526f\u672c\u4fee\u590d\u3002\u9ed8\u8ba4 innodb_doublewrite = ON\u3002<\/p>\n

    Buffer Pool \u7684\u4e09\u6761\u94fe\u8868\u3002 Buffer Pool \u5185\u90e8\u7528\u4e09\u6761\u94fe\u8868\u7ba1\u7406\u9875：<\/p>\n

      \n
    • free list：\u7ba1\u7406\u5c1a\u672a\u4f7f\u7528\u7684\u7a7a\u95f2\u9875，\u5206\u914d\u65b0\u9875\u65f6\u4ece\u8fd9\u91cc\u53d6；<\/li>\n
    • LRU list：\u7f13\u5b58\u9875\u6309\u6539\u8fdb LRU \u7ec4\u7ec7\u2014\u2014\u65b0\u8bfb\u5165\u7684\u9875\u63d2\u5165 LRU \u4e2d\u70b9（old \u533a）\u800c\u975e\u961f\u9996，\u907f\u514d\u5168\u8868\u626b\u63cf\u628a\u70ed\u70b9\u9875\u51b2\u6389；old \u533a\u6bd4\u4f8b\u7531 innodb_old_blocks_pct（\u9ed8\u8ba4 37%）\u63a7\u5236，\u9875\u5728 old \u533a\u505c\u7559\u8d85\u8fc7 innodb_old_blocks_time \u624d\u664b\u5347 young \u533a；<\/li>\n
    • flush list：\u810f\u9875\u6309 oldest_modification LSN \u5347\u5e8f\u6392\u5217，\u540e\u53f0\u7ebf\u7a0b\u4f9d\u6b64\u987a\u5e8f\u5237\u76d8\u3002<\/li>\n<\/ul>\n

      \u5185\u5b58\u6539\u5b8c\u4f46\u4ecd\u6613\u5931，\u5b95\u673a\u5373\u4e22，\u4e8e\u662f\u9700\u8981 Undo \u7559\u9000\u8def\u3001Redo \u4fdd\u5b89\u5168，\u5148\u770b Undo Log\u3002<\/p>\n

      \u56db\u3001\u56de\u6eda\u7684Undo Log\u65e5\u5fd7<\/h3>\n

      \u6539\u5185\u5b58\u524d\u987b\u7559\u9000\u8def\u3002\u4e8b\u52a1\u539f\u5b50\u6027\u4e0e\u5e76\u53d1\u5feb\u7167\u8bfb\u90fd\u9760 Undo Log \u652f\u6491\u3002\u672c\u8282\u8bf4\u660e\u5176\u4f5c\u7528\u3002<\/p>\n

      \u5728\u4fee\u6539\u5185\u5b58\u4e4b\u524d，InnoDB \u5148\u628a\u4fee\u6539\u524d\u7684\u65e7\u503c\u5199\u5165 Undo Log\u3002<\/p>\n

      \u5b83\u7684\u4f5c\u7528\u76f4\u63a5：\u4e8b\u52a1\u56de\u6eda\u65f6，\u4f9d\u9760 Undo Log \u5c06\u6570\u636e\u9006\u5411\u8fd8\u539f\u5230\u4e8b\u52a1\u5f00\u59cb\u524d\u7684\u72b6\u6001，\u8fd9\u662f\u4e8b\u52a1\u539f\u5b50\u6027\u7684\u5e95\u5c42\u652f\u6491\u3002\u6b64\u5916，MVCC \u591a\u7248\u672c\u5feb\u7167\u4e5f\u4f9d\u8d56 Undo Log \u5b58\u50a8\u5386\u53f2\u7248\u672c，\u4f7f\u8bfb\u8bf7\u6c42\u80fd\u62ff\u5230\u4e00\u81f4\u7684\u5feb\u7167\u800c\u4e0d\u88ab\u5199\u963b\u585e\u3002Undo Log \u5206\u4e24\u7c7b：insert undo（\u63d2\u5165\u4ea7\u751f\u7684，\u4e8b\u52a1\u63d0\u4ea4\u540e\u53ef\u76f4\u63a5\u4e22\u5f03）\u4e0e update undo（\u66f4\u65b0\/\u5220\u9664\u4ea7\u751f\u7684，\u9700\u4fdd\u7559\u4f9b MVCC \u5386\u53f2\u7248\u672c，\u7531 purge \u7ebf\u7a0b\u5728\u4e0d\u518d\u88ab\u5f15\u7528\u540e\u6e05\u7406）\u3002<\/p>\n

      Undo \u89e3\u51b3\u56de\u6eda\u4e0e\u5feb\u7167\u8bfb，\u4f46\u6ca1\u89e3\u51b3\u5d29\u6e83\u4e0d\u4e22\u3002\u771f\u6b63\u515c\u5e95\u7684\u662f Redo Log\u3002<\/p>\n

      \u4e94\u3001MVCC \u4e0e\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b<\/h3>\n

      Undo Log \u652f\u6491 MVCC\u3002MVCC \u9760\u884c\u7248\u672c\u94fe\u4e0e ReadView \u5b9e\u73b0\u8bfb\u5199\u4e0d\u963b\u585e，\u9694\u79bb\u7ea7\u522b\u51b3\u5b9a\u53ef\u89c1\u54ea\u4e9b\u7248\u672c\u3002\u672c\u8282\u518d\u8865\u9501\u673a\u5236，\u8bf4\u660e\u5e76\u53d1\u4fee\u6539\u5982\u4f55\u88ab\u7ea6\u675f\u3002<\/p>\n

      InnoDB \u6bcf\u884c\u8bb0\u5f55\u5e26\u6709\u9690\u85cf\u5217：DB_TRX_ID（\u6700\u540e\u4e00\u6b21\u4fee\u6539\u8be5\u884c\u7684\u4e8b\u52a1 ID）\u4e0e DB_ROLL_PTR（\u56de\u6eda\u6307\u9488，\u6307\u5411 Undo Log \u4e2d\u7684\u5386\u53f2\u7248\u672c）\u3002\u4e8b\u52a1\u53d1\u8d77\u8bfb\u65f6，InnoDB \u751f\u6210 ReadView，\u4f9d\u636e\u5404\u7248\u672c\u7684\u4e8b\u52a1 ID \u5224\u65ad\u53ef\u89c1\u6027：\u53ea\u6709"\u5df2\u63d0\u4ea4\u4e14\u4e0d\u5728\u5f53\u524d\u4e8b\u52a1\u6d3b\u8dc3\u96c6\u5408"\u7684\u7248\u672c\u624d\u53ef\u89c1，\u4ece\u800c\u62ff\u5230\u4e00\u81f4\u6027\u5feb\u7167\u3002<\/p>\n

      \u56db\u79cd\u6807\u51c6\u9694\u79bb\u7ea7\u522b\u7684\u5dee\u5f02\u5982\u4e0b：<\/p>\n\n\u9694\u79bb\u7ea7\u522b\u5feb\u7167\u7c92\u5ea6\u5178\u578b\u95ee\u9898\u5b9e\u73b0\u8981\u70b9<\/tr>\n\n\n\n\n\n
      READ UNCOMMITTED<\/td>\n\u65e0\u5feb\u7167<\/td>\n\u810f\u8bfb（\u8bfb\u5230\u672a\u63d0\u4ea4）<\/td>\n\u76f4\u63a5\u8bfb\u6700\u65b0<\/td>\n<\/tr>\n
      READ COMMITTED<\/td>\n\u8bed\u53e5\u7ea7<\/td>\n\u4e0d\u53ef\u91cd\u590d\u8bfb<\/td>\n\u6bcf\u6761\u8bed\u53e5\u65b0\u5efa ReadView<\/td>\n<\/tr>\n
      REPEATABLE READ（\u9ed8\u8ba4）<\/td>\n\u4e8b\u52a1\u7ea7<\/td>\n\u5e7b\u8bfb（\u9760 Gap \u9501\u7f13\u89e3）<\/td>\n\u4e8b\u52a1\u9996\u6b21\u8bfb\u5efa ReadView，\u5168\u7a0b\u4e0d\u53d8<\/td>\n<\/tr>\n
      SERIALIZABLE<\/td>\n\u4e32\u884c<\/td>\n\u65e0<\/td>\n\u8bfb\u52a0\u5171\u4eab\u9501，\u7b49\u4ef7\u4e8e\u4e32\u884c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u9501：\u884c\u9501\u3001\u95f4\u9699\u9501\u4e0e Next-Key Lock\u3002 MVCC \u89e3\u51b3\u8bfb\u5199\u4e0d\u963b\u585e，\u5199\u5199\u51b2\u7a81\u9760\u9501\u7ea6\u675f：<\/p>\n

        \n
      • Record Lock（\u8bb0\u5f55\u9501）：\u9501\u4f4f\u7d22\u5f15\u4e0a\u7684\u5177\u4f53\u8bb0\u5f55；<\/li>\n
      • Gap Lock（\u95f4\u9699\u9501）：\u9501\u4f4f\u8bb0\u5f55\u4e4b\u95f4\u7684\u95f4\u9699，\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u63d2\u5165，\u7528\u4e8e\u89e3\u51b3\u5e7b\u8bfb；<\/li>\n
      • Next-Key Lock：Record Lock + Gap Lock \u7684\u7ec4\u5408，\u9501\u5b9a\u8bb0\u5f55\u53ca\u524d\u9762\u95f4\u9699（\u5de6\u5f00\u53f3\u95ed），\u662f RR \u7ea7\u522b\u4e0b\u7684\u9ed8\u8ba4\u884c\u9501\u7b97\u6cd5；<\/li>\n
      • \u610f\u5411\u9501 IS \/ IX：\u8868\u7ea7\u9501，\u534f\u8c03\u8868\u9501\u4e0e\u884c\u9501，\u907f\u514d\u9010\u884c\u68c0\u67e5\u3002<\/li>\n<\/ul>\n

        RC \u7ea7\u522b\u4e0b\u901a\u5e38\u53ea\u4f7f\u7528 Record Lock（\u552f\u4e00\u7d22\u5f15\u7b49\u503c\u67e5\u8be2\u9664\u5916），RR \u7ea7\u522b\u4e0b\u4f7f\u7528 Next-Key Lock\u3002\u9694\u79bb\u7ea7\u522b\u51b3\u5b9a\u53ef\u89c1\u54ea\u4e9b\u7248\u672c，\u4f46\u8fd9\u4e9b\u7248\u672c\u4ecd\u5728\u5185\u5b58\u4e2d，\u5b95\u673a\u5373\u4e22，\u6062\u590d\u9760Redo Log\u3002<\/p>\n

        \u516d\u3001Redo Log：\u5d29\u6e83\u4e5f\u4e0d\u4e22\u7684\u5e95\u6c14<\/h3>\n

        \u5185\u5b58\u6539\u5b8c\u672a\u843d\u76d8，\u5b95\u673a\u5373\u4e22\u3002Redo Log \u7528\u987a\u5e8f\u5199 + \u5d29\u6e83\u91cd\u653e\u6362\u53d6\u63d0\u4ea4\u5373\u53ef\u4e0d\u4e22\u3002\u672c\u8282\u8bb2\u539f\u7406\u3001WAL\/ARIES\u3001\u6587\u4ef6\u7ed3\u6784\u4e0e LSN\/Checkpoint\u3002<\/p>\n

        Redo Log \u662f\u4e00\u4efd\u7269\u7406\u65e5\u5fd7，\u8bb0\u5f55"\u5bf9\u54ea\u4e2a\u6570\u636e\u9875\u7684\u54ea\u6761\u8bb0\u5f55\u505a\u4e86\u4ec0\u4e48\u4fee\u6539"，\u6709\u4e24\u4e2a\u4f5c\u7528：\u5d29\u6e83\u540e\u91cd\u653e Redo Log，\u53ef\u6062\u590d\u5230\u6700\u540e\u4e00\u6b21\u63d0\u4ea4\u7684\u72b6\u6001；\u628a\u968f\u673a\u5199\u78c1\u76d8\u8f6c\u4e3a\u987a\u5e8f\u5199\u65e5\u5fd7，\u63d0\u5347\u5199\u5165\u541e\u5410\u3002<\/p>\n

        WAL \u4e0e ARIES \u539f\u5219\u3002 Redo Log \u7684\u7406\u8bba\u57fa\u7840\u662f WAL（Write-Ahead Logging，\u5148\u5199\u65e5\u5fd7）：\u4e8b\u52a1\u63d0\u4ea4\u65f6，\u5176\u5bf9\u5e94\u7684 Redo \u5fc5\u987b\u5148\u843d\u76d8（force log at commit），\u6570\u636e\u9875\u53ef\u5ef6\u540e\u5237\u76d8\u3002\u8fd9\u6837\u7528\u987a\u5e8f\u65e5\u5fd7\u5199\u66ff\u4ee3\u968f\u673a\u9875\u5199，\u5d29\u6e83\u540e\u9760\u91cd\u653e\u6062\u590d\u3002InnoDB \u7684\u5b9e\u73b0\u601d\u60f3\u6e90\u81ea IBM \u7684 ARIES \u7b97\u6cd5，\u6838\u5fc3\u4e09\u6761：WAL（\u5148\u5199\u65e5\u5fd7）\u3001Repeat History（\u91cd\u653e\u65f6\u8fde\u672a\u63d0\u4ea4\u4e8b\u52a1\u7684\u64cd\u4f5c\u4e00\u8d77\u91cd\u653e）\u3001Undo \u7528\u65e5\u5fd7\u8bb0\u5f55\u7684\u9006\u64cd\u4f5c\u56de\u6eda\u3002\u5de5\u7a0b\u4e0a InnoDB \u91c7\u7528 steal（\u810f\u9875\u53ef\u63d0\u524d\u5237\u76d8）+ no-force（\u4e8b\u52a1\u63d0\u4ea4\u4e0d\u5fc5\u7acb\u5373\u5237\u6570\u636e\u9875），\u6301\u4e45\u6027\u5b8c\u5168\u7531 Redo \u4fdd\u8bc1\u3002<\/p>\n

        \u6587\u4ef6\u7ed3\u6784\u4e0e\u5faa\u73af\u5199\u3002 Redo Log \u7531\u4e00\u7ec4\u6587\u4ef6（\u5982 ib_logfile0\u3001ib_logfile1）\u7ec4\u6210，\u7531 innodb_log_files_in_group \u4e0e innodb_log_file_size \u51b3\u5b9a\u5927\u5c0f，\u73af\u72b6\u5faa\u73af\u5199\u5165\u3002\u6587\u4ef6\u4e0a\u6709 write pos（\u5f53\u524d\u5199\u5165\u4f4d\u7f6e）\u548c checkpoint（\u5df2\u5237\u76d8\u810f\u9875\u5bf9\u5e94\u7684\u91cd\u653e\u70b9），\u4e8c\u8005\u4e4b\u95f4\u7684\u533a\u57df\u662f\u53ef\u7528\u7a7a\u95f4；checkpoint \u63a8\u8fdb\u8868\u793a\u5bf9\u5e94\u810f\u9875\u5df2\u843d\u76d8，\u8be5\u6bb5 Redo \u53ef\u88ab\u8986\u76d6\u3002<\/p>\n

        LSN \u4e0e Checkpoint\u3002 LSN（Log Sequence Number）\u662f\u5355\u8c03\u9012\u589e\u7684\u65e5\u5fd7\u5e8f\u53f7，\u6570\u636e\u9875\u3001Redo \u8bb0\u5f55\u3001Checkpoint \u90fd\u5e26 LSN\u3002Checkpoint \u8bb0\u5f55"\u5df2\u5237\u76d8\u810f\u9875\u5bf9\u5e94\u7684\u6700\u8001 LSN"，\u5d29\u6e83\u6062\u590d\u65f6\u53ea\u9700\u91cd\u653e\u8be5 LSN \u4e4b\u540e\u7684 Redo\u3002\u8fd0\u884c\u671f\u91c7\u7528 fuzzy checkpoint（master thread\u3001flush list\u3001\u810f\u9875\u8fc7\u591a\u7b49\u89e6\u53d1），\u4e0d\u963b\u585e\u5199\u5165；\u6062\u590d\u9636\u6bb5\u6bd4\u8f83\u9875 LSN \u4e0e Redo LSN，\u4ec5\u91cd\u653e\u9875 LSN \u4e4b\u540e\u7684\u8bb0\u5f55\u3002<\/p>\n

        \u5237\u76d8\u7b56\u7565\u3002 \u4fee\u6539\u53d1\u751f\u65f6\u5148\u5199\u5165\u5185\u5b58\u7684 Redo Log Buffer（\u9ed8\u8ba4 8MB，\u7531 innodb_log_buffer_size \u63a7\u5236），\u4e8b\u52a1\u63d0\u4ea4\u65f6\u5237\u76d8\u3002\u5237\u76d8\u7b56\u7565\u7531 innodb_flush_log_at_trx_commit \u63a7\u5236：<\/p>\n\n\u503c\u884c\u4e3a\u53d6\u820d<\/tr>\n\n\n\n\n
        0<\/td>\n\u63d0\u4ea4\u65f6\u4ec5\u5199\u5165 OS \u7f13\u5b58，\u4e0d\u7acb\u5373\u5237\u76d8<\/td>\n\u6027\u80fd\u6700\u597d，\u5d29\u6e83\u53ef\u80fd\u4e22\u6570\u636e<\/td>\n<\/tr>\n
        1（\u9ed8\u8ba4）<\/td>\n\u63d0\u4ea4\u65f6\u7acb\u5373\u5237\u76d8\u5e76\u7b49\u5f85 IO \u5b8c\u6210<\/td>\n\u6700\u5b89\u5168，\u6027\u80fd\u7565\u6709\u635f\u8017<\/td>\n<\/tr>\n
        2<\/td>\n\u63d0\u4ea4\u65f6\u5199\u5165 OS \u7f13\u5b58，\u7531\u540e\u53f0\u5f02\u6b65\u5237\u76d8<\/td>\n\u6027\u80fd\u4e0e\u4fdd\u62a4\u6298\u4e2d，\u4ecd\u6709\u98ce\u9669<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        \u7ebf\u4e0a\u6838\u5fc3\u4e1a\u52a1\u5efa\u8bae\u8bbe\u4e3a 1，\u63d0\u4ea4\u5373\u843d\u76d8，\u4e25\u683c\u4fdd\u8bc1\u6570\u636e\u4e0d\u4e22\u3002<\/p>\n

        \u5d29\u6e83\u6062\u590d\u65f6\u5982\u4f55\u91cd\u653e\u3002 \u91cd\u542f\u540e InnoDB \u8fdb\u5165\u6062\u590d\u9636\u6bb5：\u5148\u7528 Redo Log \u628a\u8bb0\u5f55\u91cd\u653e\u5230\u5185\u5b58（\u542b\u5df2\u63d0\u4ea4\u548c\u5d29\u6e83\u77ac\u95f4\u672a\u5b8c\u6210\u7684\u64cd\u4f5c，\u5373 Repeat History），\u518d\u5bf9 Redo \u4e2d\u6ca1\u6709 commit \u6807\u8bb0\u7684\u4e8b\u52a1，\u7528 Undo Log \u56de\u6eda\u3002\u4e24\u9636\u6bb5\u63d0\u4ea4\u4fdd\u8bc1 Redo \u4e0e Binlog \u4e00\u81f4：\u63d0\u4ea4\u65f6\u5148\u5199 Redo（prepare，\u65e0 commit \u6807\u8bb0）\u3001\u518d\u5199 Binlog\u3001\u6700\u540e\u5728 Redo \u5199 commit \u6807\u8bb0；\u6062\u590d\u65f6\u82e5 Binlog \u5df2\u5b8c\u6574\u5199\u5165\u5219\u8865\u63d0\u4ea4，\u5426\u5219\u56de\u6eda\u3002<\/p>\n

        Redo \u4fdd\u5f15\u64ce\u5c42\u4e0d\u4e22，\u4f46\u4e3b\u4ece\u590d\u5236\u4e0e\u6062\u590d\u4f9d\u8d56 Server \u5c42\u7684 Binlog\u3002<\/p>\n

        \u4e03\u3001Binlog：Server \u5c42\u7684\u5f52\u6863\u65e5\u5fd7<\/h3>\n

        Binlog \u662f Server \u5c42\u903b\u8f91\u65e5\u5fd7，\u4e0e\u5f15\u64ce\u65e0\u5173，\u53ef\u8de8\u5f15\u64ce\u7528\u4e8e\u590d\u5236\u4e0e\u6062\u590d\u3002<\/p>\n

        Binlog \u8bb0\u5f55"\u5bf9 users \u8868 id=1 \u90a3\u884c\u505a\u4e86\u66f4\u65b0，\u66f4\u65b0\u540e\u7684\u503c\u662f\u4ec0\u4e48"，\u5f52\u5c5e Server \u5c42\u3002Binlog \u5237\u76d8\u7b56\u7565\u7531 sync_binlog \u63a7\u5236，\u9ed8\u8ba4 0（\u5148\u8fdb\u5165 OS \u7f13\u5b58，\u5b95\u673a\u53ef\u80fd\u4e22），\u8bbe\u4e3a 1 \u5219\u63d0\u4ea4\u65f6\u5f3a\u5236\u843d\u76d8\u3002<\/p>\n

        Binlog \u6709\u4e09\u79cd\u683c\u5f0f：<\/p>\n\n\u683c\u5f0f\u8bb0\u5f55\u5185\u5bb9\u4f18\u70b9\u7f3a\u70b9<\/tr>\n\n\n\n\n
        STATEMENT<\/td>\n\u539f\u59cb SQL \u8bed\u53e5<\/td>\n\u65e5\u5fd7\u91cf\u5c0f<\/td>\nnow()\/uuid()\/limit \u7b49\u4e0d\u786e\u5b9a\u51fd\u6570\u81f4\u4e3b\u4ece\u4e0d\u4e00\u81f4<\/td>\n<\/tr>\n
        ROW（\u9ed8\u8ba4）<\/td>\n\u6bcf\u884c\u524d\u540e\u50cf<\/td>\n\u4e3b\u4ece\u7edd\u5bf9\u4e00\u81f4，\u6700\u5b89\u5168<\/td>\n\u65e5\u5fd7\u91cf\u5927<\/td>\n<\/tr>\n
        MIXED<\/td>\n\u81ea\u52a8\u5207\u6362<\/td>\n\u517c\u987e\u7a7a\u95f4\u4e0e\u6b63\u786e<\/td>\n\u884c\u4e3a\u4f9d\u8d56\u4f18\u5316\u5668\u5224\u65ad<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        \u4e24\u9636\u6bb5\u63d0\u4ea4：\u8ba9 Redo \u4e0e Binlog \u4fdd\u6301\u4e00\u81f4\u3002 \u63d0\u4ea4\u4e8b\u52a1\u3001Binlog \u843d\u76d8\u540e，InnoDB \u8fd8\u4f1a\u505a\u5173\u952e\u4e00\u6b65：\u5c06\u672c\u6b21\u66f4\u65b0\u7684 Binlog \u6587\u4ef6\u540d\u4e0e\u4f4d\u7f6e\u5199\u5165 Redo Log，\u5e76\u5728 Redo Log \u4e2d\u5199\u5165 commit \u6807\u8bb0\u3002\u53ea\u6709 Redo Log \u4e2d\u51fa\u73b0\u4e86\u8fd9\u4e2a\u6807\u8bb0，\u4e8b\u52a1\u624d\u7b97\u771f\u6b63\u63d0\u4ea4\u6210\u529f\u3002\u8fd9\u4e00\u6b65\u7684\u610f\u4e49\u5728\u4e8e：\u4fdd\u8bc1 Redo Log \u4e0e Binlog \u4e24\u4fa7\u90fd\u5b8c\u6574\u8bb0\u5f55\u4e86\u8fd9\u6b21\u66f4\u65b0，\u907f\u514d\u51fa\u73b0"\u4e00\u8fb9\u6709\u3001\u4e00\u8fb9\u6ca1\u6709"\u7684\u4e0d\u4e00\u81f4\u3002\u5728\u5185\u90e8\u5b9e\u73b0\u4e0a，\u8fd9\u662f\u4e00\u4e2a XA \u4e8b\u52a1，\u7531 Server \u5c42\u7edf\u4e00\u534f\u8c03 Redo \u4e0e Binlog \u7684\u63d0\u4ea4\u987a\u5e8f\u3002<\/p>\n

        \u6700\u540e，\u540e\u53f0 IO \u7ebf\u7a0b\u4f1a\u5728\u4e4b\u540e\u7684\u67d0\u4e2a\u65f6\u673a，\u5c06 Buffer Pool \u4e2d\u7684\u810f\u9875\u5f02\u6b65\u5237\u56de\u78c1\u76d8\u3002\u5373\u4fbf\u5728\u5237\u76d8\u524d\u5d29\u6e83，\u91cd\u542f\u540e\u4e5f\u4f1a\u4f9d\u636e Redo Log \u6062\u590d\u5185\u5b58\u4e2d\u7684\u4fee\u6539，\u5f85\u65f6\u673a\u6210\u719f\u518d\u5237\u76d8\u3002<\/p>\n

        Redo \u4e0e Binlog \u5bf9\u9f50\u3001\u810f\u9875\u843d\u76d8，\u94fe\u8def\u95ed\u5408\u3002
        \n\u4e3a\u5565\u91c7\u75282PC？ \u4e0d\u7528 2PC，\u4e24\u79cd\u9519\u8bef\u6267\u884c\u987a\u5e8f\u90fd\u4f1a\u51fa\u6570\u636e\u9519\u4e71
        \n\u65b9\u6848 A：\u5148\u5199 Redo \u63d0\u4ea4，\u518d\u5199 Binlog<\/p>\n

          \n
        • \u65f6\u5e8f：\u66f4\u65b0\u5185\u5b58 \u2192 Redo \u5237\u76d8\u6807\u8bb0 COMMIT \u2192 \u5b95\u673a \u2192 Binlog \u8fd8\u6ca1\u5199<\/li>\n
        • \u672c\u5730 InnoDB：\u91cd\u542f\u56de\u653eRedo，\u8fd9\u6761\u66f4\u65b0\u5b58\u5728；<\/li>\n
        • Binlog：\u65e0\u8fd9\u6761\u8bb0\u5f55，\u4ece\u5e93 \/ \u5907\u4efd\u4e0d\u4f1a\u540c\u6b65\u8be5\u66f4\u65b0；<\/li>\n<\/ul>\n

          \u7ed3\u679c：\u4e3b\u5e93\u591a\u6570\u636e，\u4ece\u5e93\u5c11\u6570\u636e，\u4e3b\u4ece\u4e0d\u4e00\u81f4\u3002<\/p>\n

          \u65b9\u6848 B：\u5148\u5199 Binlog，\u518d\u5199 Redo \u63d0\u4ea4<\/p>\n

            \n
          • \u65f6\u5e8f：\u66f4\u65b0\u5185\u5b58 \u2192 Binlog \u5b8c\u6574\u843d\u76d8 \u2192 \u5b95\u673a \u2192 Redo \u6ca1\u6807\u8bb0\u63d0\u4ea4<\/li>\n
          • Binlog \u5df2\u6301\u4e45\u5316，\u4ece\u5e93\u5df2\u7ecf\u540c\u6b65\u6267\u884c\u66f4\u65b0；<\/li>\n
          • InnoDB \u91cd\u542f\u540e，Redo \u65e0\u63d0\u4ea4\u6807\u8bb0，\u76f4\u63a5\u56de\u6eda\u4e8b\u52a1；<\/li>\n<\/ul>\n

            \u7ed3\u679c：\u4e3b\u5e93\u5c11\u6570\u636e，\u4ece\u5e93\u591a\u6570\u636e，\u4e3b\u4ece\u4e0d\u4e00\u81f4\u3002<\/p>\n

            \u5173\u952e\u77db\u76fe
            \n\u4e24\u4e2a IO \u64cd\u4f5c\u4e2d\u95f4\u968f\u65f6\u5b95\u673a，\u5fc5\u7136\u51fa\u73b0\u4e00\u4efd\u65e5\u5fd7\u6709\u4e8b\u52a1\u3001\u53e6\u4e00\u4efd\u6ca1\u6709\u3002
            \n\u4e1a\u52a1\u3001\u4e3b\u4ece\u3001\u5b9a\u65f6\u5907\u4efd\u5168\u90e8\u9519\u4e71，\u6570\u636e\u5b8c\u5168\u4e0d\u53ef\u4fe1\u3002
            \n\u5355\u7eaf\u4e32\u884c\u987a\u5e8f\u65e0\u6cd5\u89e3\u51b3 \u201c\u4e2d\u95f4\u5b95\u673a\u201d \u7684\u539f\u5b50\u6027\u95ee\u9898，\u5fc5\u987b\u5f15\u5165\u534f\u8c03\u673a\u5236，\u4e5f\u5c31\u662f\u4e24\u9636\u6bb5\u63d0\u4ea4\u3002<\/p>\n

            \u4e3a\u5565 Binlog \u5728 server \u5c42？<\/p>\n

              \n
            • Binlog \u662f\u5168\u5f15\u64ce\u901a\u7528\u3001\u5b9e\u4f8b\u5168\u5c40\u7684\u590d\u5236 \/ \u5907\u4efd\u65e5\u5fd7，MyISAM \u7b49\u65e0\u4e8b\u52a1\u5f15\u64ce\u4e5f\u9700\u8981；<\/li>\n
            • Binlog \u8bb0\u5f55 SQL \u903b\u8f91\u53d8\u66f4，\u7531Server \u5c42 SQL \u6267\u884c\u5668\u7edf\u4e00\u751f\u6210； \u4e3b\u4ece\u590d\u5236\u3001\u65f6\u95f4\u70b9\u6062\u590d\u5c5e\u4e8e MySQL \u9876\u5c42\u670d\u52a1\u80fd\u529b，\u4e0d\u5c5e\u4e8e\u5355\u4e2a\u5b58\u50a8\u5f15\u64ce；<\/li>\n
            • 2PC \u534f\u8bae\u9700\u8981Server \u4f5c\u4e3a\u534f\u8c03\u8005\u6301\u6709 Binlog，\u624d\u80fd\u534f\u8c03 InnoDB \u7684 Redo \u4fdd\u8bc1\u4e00\u81f4\u6027；<\/li>\n
            • \u5206\u5c42\u67b6\u6784\u804c\u8d23\u89e3\u8026，\u901a\u7528\u80fd\u529b\u653eServer，\u5f15\u64ce\u4e13\u5c5e\u4e8b\u52a1 \/ \u7269\u7406\u65e5\u5fd7\u4e0b\u6c89\u5f15\u64ce\u3002<\/li>\n<\/ul>\n

              \u516b\u3001\u4e00\u6761 UPDATE \u7684\u5b8c\u6574\u65f6\u95f4\u7ebf<\/h3>\n

              \u628a\u524d\u9762\u5404\u7ec4\u4ef6\u6309\u65f6\u95f4\u987a\u5e8f\u6392\u6210\u4e00\u5f20\u8868，\u5efa\u7acb\u7aef\u5230\u7aef\u8ba4\u77e5，\u5171\u4e5d\u4e2a\u6b65\u9aa4\u3002<\/p>\n\n\u6b65\u9aa4\u7ec4\u4ef6\u52a8\u4f5c<\/tr>\n\n\n\n\n\n\n\n\n\n\n
              1<\/td>\nJDBC + \u8fde\u63a5\u6c60<\/td>\n\u5e94\u7528\u53d1\u9001 SQL，\u83b7\u53d6\u8fde\u63a5<\/td>\n<\/tr>\n
              2<\/td>\n\u7f51\u7edc + \u7ebf\u7a0b<\/td>\nMySQL \u5206\u914d\u7ebf\u7a0b，\u8bfb\u53d6\u5e76\u89e3\u6790 SQL<\/td>\n<\/tr>\n
              3<\/td>\nServer \u5c42<\/td>\n\u63a5\u53e3\u63a5\u6536 \u2192 \u89e3\u6790\u5668\u89e3\u6790 \u2192 \u4f18\u5316\u5668\u9009\u8def \u2192 \u6267\u884c\u5668\u8c03\u5ea6<\/td>\n<\/tr>\n
              4<\/td>\nInnoDB<\/td>\n\u52a0\u8f7d\u6570\u636e\u9875\u8fdb Buffer Pool，\u52a0\u72ec\u5360\u9501<\/td>\n<\/tr>\n
              5<\/td>\nUndo Log<\/td>\n\u8bb0\u5f55\u4fee\u6539\u524d\u65e7\u503c<\/td>\n<\/tr>\n
              6<\/td>\nBuffer Pool<\/td>\n\u5185\u5b58\u4e2d\u6539\u4e3a\u65b0\u503c（\u4ea7\u751f\u810f\u9875）<\/td>\n<\/tr>\n
              7<\/td>\nRedo Log Buffer<\/td>\n\u8bb0\u5f55\u7269\u7406\u4fee\u6539<\/td>\n<\/tr>\n
              8<\/td>\n\u63d0\u4ea4\u4e8b\u52a1<\/td>\nRedo \u5237\u76d8 \u2192 Binlog \u5237\u76d8 \u2192 Redo \u5199 commit \u6807\u8bb0<\/td>\n<\/tr>\n
              9<\/td>\n\u540e\u53f0 IO \u7ebf\u7a0b<\/td>\n\u540e\u7eed\u67d0\u65f6\u673a\u5c06\u810f\u9875\u5237\u56de\u78c1\u76d8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
              \n\u8fd9\u5f20\u8868\u662f\u5168\u6587\u9aa8\u67b6，\u8dd1\u7a33\u673a\u5236\u8fd8\u9700\u6b63\u786e\u914d\u7f6e\u53c2\u6570\u3002<\/p>\n

              \u4e5d\u3001\u843d\u5730\u5230\u914d\u7f6e：\u5173\u952e\u53c2\u6570<\/h3>\n

              \u539f\u7406\u843d\u5230\u53c2\u6570\u3002\u4e0b\u9762\u6c47\u603b\u5f71\u54cd\u6027\u80fd\u4e0e\u5b89\u5168\u7684\u5173\u952e\u53c2\u6570\u53ca\u53d6\u820d\u3002<\/p>\n\n\u53c2\u6570\u63a8\u8350\u503c\u8bf4\u660e<\/tr>\n\n\n\n\n\n\n\n\n
              innodb_buffer_pool_size<\/td>\n\u7269\u7406\u5185\u5b58 60%~75%<\/td>\n\u7f13\u5b58\u547d\u4e2d\u7387\u76f4\u63a5\u51b3\u5b9a\u6027\u80fd<\/td>\n<\/tr>\n
              innodb_log_file_size<\/td>\n512M~1G（\u6743\u8861\u6062\u590d\u65f6\u957f）<\/td>\n\u8d8a\u5927\u5199\u541e\u5410\u8d8a\u9ad8，\u4f46\u5d29\u6e83\u6062\u590d\u8d8a\u6162<\/td>\n<\/tr>\n
              innodb_flush_log_at_trx_commit<\/td>\n1<\/td>\n\u4e8b\u52a1\u63d0\u4ea4 Redo \u5373\u843d\u76d8，\u4e0d\u4e22\u6570\u636e<\/td>\n<\/tr>\n
              sync_binlog<\/td>\n1<\/td>\n\u4e8b\u52a1\u63d0\u4ea4 Binlog \u5373\u843d\u76d8，\u4e3b\u4ece\u4e00\u81f4<\/td>\n<\/tr>\n
              innodb_doublewrite<\/td>\nON<\/td>\n\u53cc\u5199\u9632\u90e8\u5206\u5199\u5931\u6548，\u4e00\u822c\u4e0d\u5173<\/td>\n<\/tr>\n
              innodb_change_buffering<\/td>\nall<\/td>\n\u975e\u552f\u4e00\u7d22\u5f15\u6539\u52a8\u8fdb Change Buffer<\/td>\n<\/tr>\n
              innodb_io_capacity<\/td>\n\u6309\u78c1\u76d8（SSD 2000~4000）<\/td>\n\u540e\u53f0\u5237\u810f\u9875\u7684 IO \u80fd\u529b\u4e0a\u9650<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              \u6838\u5fc3\u4e1a\u52a1\u52a1\u5fc5\u628a innodb_flush_log_at_trx_commit \u4e0e sync_binlog \u90fd\u8bbe\u4e3a 1，\u4ee5\u6362\u53d6\u4e25\u683c\u4e0d\u4e22；\u541e\u5410\u654f\u611f\u4e14\u53ef\u5bb9\u5fcd\u5c11\u91cf\u4e22\u5931\u7684\u573a\u666f\u624d\u8003\u8651\u653e\u5bbd\u3002<\/p>\n

              \u5341\u3001\u5b9e\u73b0\u5386\u7a0b：MySQL \u4e0e InnoDB \u7684\u6f14\u8fdb<\/h3>\n

              \u7406\u89e3\u5e95\u5c42\u539f\u7406，\u4e5f\u9700\u77e5\u9053\u8fd9\u5957\u67b6\u6784\u4ece\u4f55\u800c\u6765\u3002MySQL \u81ea\u8bbe\u8ba1\u4e4b\u521d\u5c31\u628a Server \u5c42\u4e0e\u5b58\u50a8\u5f15\u64ce\u89e3\u8026（\u63d2\u4ef6\u5316\u5f15\u64ce），Server \u8d1f\u8d23 SQL \u89e3\u6790\u3001\u4f18\u5316\u3001\u65e5\u5fd7，\u5f15\u64ce\u8d1f\u8d23\u6570\u636e\u5b58\u50a8，InnoDB \u6b63\u662f\u8fd9\u4e00\u67b6\u6784\u4e0b\u6700\u5173\u952e\u7684\u5f15\u64ce\u3002<\/p>\n

              \u5173\u952e\u8282\u70b9：<\/p>\n

                \n
              • 1995 \u5e74：MySQL \u7531 Michael \u201cMonty\u201d Widenius \u7b49\u4eba\u521b\u7acb（MySQL AB，\u745e\u5178），\u4ee5 C\/C++ \u7f16\u5199，\u6700\u521d\u4f5c\u4e3a mSQL \u7684\u66ff\u4ee3\u3002<\/li>\n
              • \u65e9\u671f\u9ed8\u8ba4\u5f15\u64ce\u4e3a MyISAM：\u8868\u7ea7\u9501\u3001\u975e\u4e8b\u52a1\u3001\u65e0\u5d29\u6e83\u6062\u590d，\u8bfb\u591a\u5199\u5c11\u573a\u666f\u8868\u73b0\u597d\u4f46\u6709\u660e\u663e\u77ed\u677f\u3002<\/li>\n
              • InnoDB \u7531 Heikki Tuuri \u521b\u7acb\u7684 Innobase Oy（\u82ac\u5170）\u5f00\u53d1，\u652f\u6301\u4e8b\u52a1\u3001\u884c\u9501\u3001MVCC\u3001\u5916\u952e；2000 \u5e74\u524d\u540e\u4f5c\u4e3a\u53ef\u9009\u5f15\u64ce\u96c6\u6210\u8fdb MySQL，5.0 \u8d77\u8d8b\u4e8e\u6210\u719f\u3002<\/li>\n
              • 2005 \u5e74 Oracle \u6536\u8d2d Innobase；2008 \u5e74 Sun \u6536\u8d2d MySQL AB；2010 \u5e74 Oracle \u6536\u8d2d Sun，MySQL \u5f52 Oracle \u6240\u6709\u3002<\/li>\n
              • 2010 \u5e74 MySQL 5.5 \u8d77，InnoDB \u6b63\u5f0f\u53d6\u4ee3 MyISAM \u6210\u4e3a\u9ed8\u8ba4\u5b58\u50a8\u5f15\u64ce\u3002<\/li>\n
              • \u793e\u533a\u5206\u652f：MariaDB（\u7531 Monty \u4e3b\u5bfc\u7684\u793e\u533a\u5206\u652f）\u3001Percona Server \u7b49，\u5728 InnoDB \u57fa\u7840\u4e0a\u5404\u81ea\u6f14\u8fdb\u3002<\/li>\n<\/ul>\n

                \u4e3b\u8981\u7248\u672c\u91cc\u7a0b\u7891：<\/p>\n\n\u7248\u672c\u5927\u81f4\u5e74\u4efd\u5173\u952e\u91cc\u7a0b\u7891<\/tr>\n\n\n\n\n\n\n\n\n
                3.23 \/ 4.0<\/td>\n2000 \u524d\u540e<\/td>\nInnoDB \u4f5c\u4e3a\u53ef\u9009\u5f15\u64ce\u96c6\u6210（\u4e8b\u52a1 \/ \u884c\u9501 \/ MVCC）<\/td>\n<\/tr>\n
                5.0<\/td>\n2003\u20132005<\/td>\nInnoDB \u6210\u719f，\u5f15\u5165\u89c6\u56fe\u3001\u5b58\u50a8\u8fc7\u7a0b\u3001\u89e6\u53d1\u5668<\/td>\n<\/tr>\n
                5.1<\/td>\n2008<\/td>\n\u5206\u533a\u8868\u3001\u4e8b\u4ef6\u8c03\u5ea6\u3001InnoDB \u63d2\u4ef6<\/td>\n<\/tr>\n
                5.5<\/td>\n2010<\/td>\nInnoDB \u6210\u9ed8\u8ba4\u5f15\u64ce；\u534a\u540c\u6b65\u590d\u5236；performance_schema<\/td>\n<\/tr>\n
                5.6<\/td>\n2013<\/td>\nGTID\u3001\u5e76\u884c\u590d\u5236\u3001InnoDB \u5168\u6587\u7d22\u5f15\u3001online DDL<\/td>\n<\/tr>\n
                5.7<\/td>\n2015<\/td>\nJSON\u3001\u751f\u6210\u5217\u3001\u591a\u6e90\u590d\u5236\u3001sys schema\u3001\u67e5\u8be2\u7f13\u5b58\u9ed8\u8ba4\u5173\u95ed<\/td>\n<\/tr>\n
                8.0<\/td>\n2018<\/td>\nCTE\/\u7a97\u53e3\u51fd\u6570\u3001\u539f\u5b50 DDL\u3001\u4e0d\u53ef\u89c1\u7d22\u5f15\u3001\u79fb\u9664\u67e5\u8be2\u7f13\u5b58\u3001\u6570\u636e\u5b57\u5178\u5165 InnoDB<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                \u4ece MyISAM \u5230 InnoDB \u7684\u66f4\u66ff，\u672c\u8d28\u4e0a\u662f"\u4e8b\u52a1\u4e0e\u5d29\u6e83\u5b89\u5168"\u6210\u4e3a\u521a\u9700\u7684\u7ed3\u679c；\u800c WAL\u3001MVCC\u3001\u4e24\u9636\u6bb5\u63d0\u4ea4\u8fd9\u4e9b\u539f\u7406，\u6b63\u662f InnoDB \u80fd\u625b\u4f4f\u6838\u5fc3\u4e1a\u52a1\u7684\u6839\u57fa\u3002<\/p>\n

                \u5c0f\u7ed3<\/h3>\n

                \u4e00\u6761 UPDATE \u4ece\u5e94\u7528\u53d1\u51fa，\u7ecf\u8fde\u63a5\u6c60\u4e0e Server \u5c42\u8fdb\u5165 InnoDB，\u5148\u5728 Buffer Pool \u6539\u5185\u5b58\u3001\u5199 Undo \u7559\u9000\u8def\u3001\u8bb0 Redo \u4fdd\u5d29\u6e83\u5b89\u5168，\u518d\u7ecf\u4e24\u9636\u6bb5\u63d0\u4ea4\u8ba9 Binlog \u4e0e Redo \u5bf9\u9f50，\u6700\u540e\u7531\u540e\u53f0\u7ebf\u7a0b\u5f02\u6b65\u5237\u810f\u9875\u843d\u76d8\u3002WAL\/ARIES \u51b3\u5b9a\u4e86"\u5148\u5199\u65e5\u5fd7"，LSN\/Checkpoint \u51b3\u5b9a\u4e86"\u6062\u590d\u4ece\u54ea\u91cc\u5f00\u59cb"，MVCC \u4e0e\u9501\u51b3\u5b9a\u4e86\u5e76\u53d1\u4e0b\u7684\u53ef\u89c1\u6027\u4e0e\u6b63\u786e\u6027\u3002<\/p>\n

                \u8fd9\u5957\u673a\u5236\u5e76\u975e\u4e00\u8e74\u800c\u5c31，\u800c\u662f\u968f MySQL\/InnoDB \u4ece MyISAM \u5230\u9ed8\u8ba4\u5f15\u64ce\u7684\u6f14\u8fdb\u9010\u6b65\u5b9a\u578b，\u4e5f\u662f\u7d22\u5f15\u8c03\u4f18\u3001\u53c2\u6570\u914d\u7f6e\u4e0e\u6545\u969c\u6392\u67e5\u7684\u5171\u540c\u57fa\u7840\u3002<\/p>\n

                \n

                \u6587\u7ae0\u7ed3\u675f，\u559c\u6b22\u5c31\u7ed9\u4e2a\u4e00\u952e\u4e09\u8fde\u5427，\u4f60\u7684\u80af\u5b9a\u662f\u6211\u6700\u5927\u7684\u52a8\u529b，\u70b9\u8d5e\u4e0a\u4e00\u5343\u6211\u5c31\u662f\u8111\u762b\u4e5f\u51fa\u4e0b\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

                \u672c\u6587\u5b8c\u6574\u68b3\u7406\u4e00\u6761 UPDATE \u5728 MySQL \u4e2d\u7684\u6267\u884c\u94fe\u8def（\u8fde\u63a5\u6c60 \u2192 Server \u5c42 \u2192 InnoDB \u5185\u5b58 \u2192 Undo \/ Redo \/ Binlog \u2192 \u5f02\u6b65\u843d\u76d8），\u4ee5\u53ca MySQL \u4e0e InnoDB \u7684\u6f14\u8fdb\u5386\u7a0b\u3002\u7406\u89e3\u8fd9\u6761\u94fe\u8def，\u662f\u56de\u7b54\u4e24\u4e2a\u95ee\u9898\u7684\u57fa\u7840：\u4e8b\u52a1\u63d0\u4ea4\u540e\u6570\u636e\u4e3a\u4ec0\u4e48\u4e0d\u4f1a\u4e22？\u4ee5\u53ca\u5d29\u6e83\u6062\u590d\u4f9d\u8d56\u4ec0\u4e48\u673a\u5236？
                \n\u4e00\u3001\u8fde\u63a5\u6c60\u8ba9\u9ad8\u5e76\u53d1\u4e0b\u4e0d\u80fd\u6bcf\u6b21\u90fd\u5efa\u8fde
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