{"id":440,"date":"2026-02-05T09:55:12","date_gmt":"2026-02-05T01:55:12","guid":{"rendered":"http:\/\/47.100.165.17\/wordpress\/?p=440"},"modified":"2026-02-05T09:55:12","modified_gmt":"2026-02-05T01:55:12","slug":"%e3%80%90mysql%e3%80%91redo-log%e8%90%bd%e7%9b%98%e6%9c%ba%e5%88%b6%e6%b7%b1%e5%ba%a6%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/yunyanglib.cn\/?p=440","title":{"rendered":"\u3010MySQL\u3011Redo Log\u843d\u76d8\u673a\u5236\u6df1\u5ea6\u89e3\u6790"},"content":{"rendered":"\n

MySQL InnoDB \u5f15\u64ce\u7684\u4e8b\u52a1\u6301\u4e45\u6027\uff08ACID \u4e2d\u7684 D\uff09\u5b8c\u5168\u4f9d\u8d56\u4e8e\u91cd\u505a\u65e5\u5fd7\uff08Redo Log\uff09\u3002\u4e0d\u540c\u4e8e\u4e8c\u8fdb\u5236\u65e5\u5fd7\uff08Binlog\uff09\u8bb0\u5f55 SQL \u903b\u8f91\uff0cRedo Log \u4ee5\u7269\u7406\u683c\u5f0f\u8bb0\u5f55\u6570\u636e\u9875\u7684\u4fee\u6539\uff0c\u5177\u5907\u5d29\u6e83\u6062\u590d\u80fd\u529b\u3002\u800c Redo Log \u7684\u843d\u76d8\u673a\u5236 \u2014\u2014 \u5373\u5185\u5b58\u7f13\u51b2\u533a\uff08Redo Log Buffer\uff09\u6570\u636e\u5237\u5199\u5230\u7269\u7406\u78c1\u76d8\u7684\u7b56\u7565\uff0c\u76f4\u63a5\u51b3\u5b9a\u4e86\u6570\u636e\u5e93\u7684\u6027\u80fd\u4e0a\u9650<\/strong>\u4e0e\u6570\u636e\u5b89\u5168\u6027\u5e95\u7ebf<\/strong>\u3002<\/p>\n\n\n\n

\u6838\u5fc3\u914d\u7f6e\u53c2\u6570 innodb_flush_log_at_trx_commit<\/code> \u6b63\u662f\u8c03\u63a7\u8fd9\u4e00\u673a\u5236\u7684\u5173\u952e\uff0c\u672c\u6587\u5c06\u4ece\u53c2\u6570\u89e3\u6790\u3001\u5b9e\u9a8c\u9a8c\u8bc1\u3001\u573a\u666f\u9009\u578b\u4e09\u4e2a\u7ef4\u5ea6\uff0c\u5e26\u4f60\u5f7b\u5e95\u638c\u63e1 Redo Log \u843d\u76d8\u7684\u5e95\u5c42\u903b\u8f91\u3002<\/p>\n\n\n\n

\u4e00\u3001\u6838\u5fc3\u53c2\u6570\uff1ainnodb_flush_log_at_trx_commit \u8be6\u89e3<\/h2>\n\n\n\n

1.1 \u53c2\u6570\u4f5c\u7528<\/h3>\n\n\n\n

\u8be5\u53c2\u6570\u63a7\u5236\u4e8b\u52a1\u63d0\u4ea4\u65f6 Redo Log \u7684\u5237\u76d8\u7b56\u7565\uff0c\u53d6\u503c\u4ec5\u652f\u6301 0\u30011\u30012 \u4e09\u79cd\uff0c\u9ed8\u8ba4\u503c\u4e3a 1\uff08\u6700\u5b89\u5168\u6a21\u5f0f\uff09\u3002<\/p>\n\n\n\n

1.2 \u4e09\u79cd\u914d\u7f6e\u7684\u843d\u76d8\u89c4\u5219<\/h3>\n\n\n\n
\u53c2\u6570\u503c<\/strong><\/td>\u843d\u76d8\u903b\u8f91<\/strong><\/td>\u4f9d\u8d56\u7ec4\u4ef6<\/strong><\/td><\/tr>
0<\/td>\u5ef6\u8fdf\u5199\uff0c\u5ef6\u8fdf\u5237<\/strong>\u3002\u6bcf\u79d2\u4e00\u6b21\u5730\u5c06\u65e5\u5fd7\u7f13\u51b2\u533a\u5199\u5165\u5e76\u5237\u5165<\/strong>\u78c1\u76d8\u3002\u4e8b\u52a1\u63d0\u4ea4\u65f6\u5b8c\u5168\u4e0d\u89e6\u53d1\u65e5\u5fd7\u7684\u78c1\u76d8I\/O<\/td>\u64cd\u4f5c\u7cfb\u7edf\u7f13\u5b58\uff08Page Cache\uff09<\/td><\/tr>
1<\/td>\u5b9e\u65f6\u5199\uff0c\u5b9e\u65f6\u5237<\/strong>\u3002\u4e8b\u52a1\u63d0\u4ea4\u65f6\u7acb\u5373\u5199\u5165\u78c1\u76d8\u6587\u4ef6\uff0c\u5e76\u8c03\u7528fsync()<\/code>\u5f3a\u5236\u5237\u5165\u7269\u7406\u78c1\u76d8<\/td>\u76f4\u63a5\u64cd\u4f5c\u7269\u7406\u78c1\u76d8\uff0c\u4e0d\u4f9d\u8d56 OS \u7f13\u5b58<\/td><\/tr>
2<\/td>\u5b9e\u65f6\u5199\uff0c\u5ef6\u8fdf\u5237<\/strong>\u3002\u6bcf\u6b21\u4e8b\u52a1\u63d0\u4ea4\u65f6\uff0c\u90fd\u5c06\u65e5\u5fd7\u7f13\u51b2\u533a\u5199\u5165<\/strong>\u64cd\u4f5c\u7cfb\u7edf\u7f13\u5b58\uff0c\u4f46\u4e0d\u8fdb\u884c\u5237\u76d8<\/strong>\u64cd\u4f5c\u3002\u5237\u76d8\u64cd\u4f5c\u4ea4\u7ed9\u4e86\u64cd\u4f5c\u7cfb\u7edf\uff0c\u6bcf\u79d2\u6267\u884c\u4e00\u6b21<\/td>\u64cd\u4f5c\u7cfb\u7edf\u7f13\u5b58 + \u5b9a\u671f\u5237\u76d8\u673a\u5236<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n

\u6ce8\uff1afsync()<\/code>\u662f\u64cd\u4f5c\u7cfb\u7edf\u8c03\u7528\uff0c\u4f5c\u7528\u662f\u5f3a\u5236\u5c06\u6587\u4ef6\u7f13\u51b2\u533a\u6570\u636e\u5199\u5165\u7269\u7406\u5b58\u50a8\u4ecb\u8d28\uff0c\u907f\u514d\u7f13\u5b58\u4e22\u5931\u3002<\/p>\n<\/blockquote>\n\n\n\n

1.3 \u67e5\u770b\u5f53\u524d\u914d\u7f6e<\/h3>\n\n\n\n
# \u67e5\u770b\u5f53\u524d\u914d\u7f6e\nshow global variables like \"innodb_flush_log_at_trx_commit\";<\/code><\/pre>\n\n\n\n
\u4e8c\u3001\u5b9e\u9a8c\u9a8c\u8bc1\uff1a\u4e0d\u540c\u914d\u7f6e\u7684\u6027\u80fd\u5dee\u5f02<\/h2>\n\n\n\n
\u4e3a\u91cf\u5316\u4e09\u79cd\u914d\u7f6e\u7684\u6027\u80fd\u5f71\u54cd\uff0c\u6211\u4eec\u8bbe\u8ba1\u4e86\u6279\u91cf\u63d2\u5165\u6d4b\u8bd5\uff0810 \u4e07\u6761\u6570\u636e\uff09\uff0c\u5b9e\u9a8c\u73af\u5883\u4e3a\u5355\u673a MySQL 8.0\uff0cInnoDB \u5b58\u50a8\u5f15\u64ce\u3002<\/p>\n\n\n\n
2.1 \u5b9e\u9a8c\u8fc7\u7a0b<\/h3>\n\n\n\n
    \n
  1. \u521b\u5efa\u6d4b\u8bd5\u8868\u4e0e\u6279\u91cf\u63d2\u5165\u5b58\u50a8\u8fc7\u7a0b\uff1a<\/li>\n<\/ol>\n\n\n\n
      <\/ol>\n\n\n\n
      # \u9009\u62e9\u6570\u636e\u5e93\nuse maria;\n\n# \u521b\u5efa\u6d4b\u8bd5\u8868\ncreate table redo_t1(\n  id int not null auto_increment,\n  a varchar(20) default null,\n  b int default null,\n  c datetime not null default current_timestamp,\n  primary key(id)\n)engine=innodb charset=utf8mb4;\n\n# \u521b\u5efa\u5b58\u50a8\u8fc7\u7a0b\uff1a\u63d2\u5165 10 \u4e07\u884c\u6570\u636e\ndelimiter ;;\ncreate procedure insert_t1()\nbegin\n  declare i int;\n  set i=1;\n  while(i<=100000)do\n    insert into redo_t1(a,b) values (i,i);\n    set i=i+1;\n  end while;\nend;;\ndelimiter ;<\/code><\/pre>\n\n\n\n
        \n
      1. \u5206\u522b\u8bbe\u7f6e\u53c2\u6570\u5e76\u6267\u884c\u5b58\u50a8\u8fc7\u7a0b\uff0c\u8bb0\u5f55\u8017\u65f6\uff1a<\/li>\n<\/ol>\n\n\n\n
          \n
        • \u573a\u666f 1\uff1ainnodb_flush_log_at_trx_commit = 0<\/li>\n<\/ul>\n\n\n\n
          set global innodb_flush_log_at_trx_commit = 0;\ncall insert_t1();  # \u8bb0\u5f55\u8017\u65f6\uff08\u793a\u4f8b\uff1a\u7ea6 11 \u79d2\uff09\ntruncate table redo_t1;  # \u6e05\u7a7a\u8868<\/code><\/pre>\n\n\n\n
          \"\"<\/figure>\n\n\n\n
            \n
          • \u573a\u666f 2\uff1ainnodb_flush_log_at_trx_commit = 1<\/li>\n<\/ul>\n\n\n\n
            set global innodb_flush_log_at_trx_commit = 1;\ncall insert_t1();  # \u8bb0\u5f55\u8017\u65f6\uff08\u793a\u4f8b\uff1a\u7ea6 65 \u79d2\uff09\ntruncate table redo_t1;<\/code><\/pre>\n\n\n\n
            \"\"<\/figure>\n\n\n\n
              \n
            • \u573a\u666f 3\uff1ainnodb_flush_log_at_trx_commit = 2<\/li>\n<\/ul>\n\n\n\n
              set global innodb_flush_log_at_trx_commit = 2;\ncall insert_t1();  # \u8bb0\u5f55\u8017\u65f6\uff08\u793a\u4f8b\uff1a\u7ea6 17 \u79d2\uff09\ntruncate table redo_t1;<\/code><\/pre>\n\n\n\n
              \"\"<\/figure>\n\n\n\n
              2.2 \u5b9e\u9a8c\u7ed3\u679c\uff08\u5355\u7ebf\u7a0b\u6d4b\u8bd5\uff09<\/h3>\n\n\n\n
              \n
              \n
              \u53c2\u6570\u503c<\/strong><\/td>\u6267\u884c\u8017\u65f6<\/strong><\/td>\u6027\u80fd\u6392\u5e8f<\/strong><\/td>\u6570\u636e\u5b89\u5168\u6027\uff08\u5d29\u6e83\u65f6\u4e22\u5931\u98ce\u9669\uff09<\/strong><\/td>\u9002\u7528\u573a\u666f<\/strong><\/td><\/tr>
              0<\/td>\u7ea611\u79d2<\/td>\u6700\u4f18<\/td>\u9ad8\uff08\u4e22\u5931 0~1 \u79d2\u5185\u7684\u4e8b\u52a1\uff09<\/td>\u975e\u6838\u5fc3\u4e1a\u52a1\uff08\u5982\u65e5\u5fd7\u5b58\u50a8\uff09<\/td><\/tr>
              1<\/td>\u7ea665\u79d2<\/td>\u6700\u5dee<\/td>\u65e0\u4e22\u5931\uff08\u5b8c\u5168\u7b26\u5408 ACID\uff09<\/td>\u6838\u5fc3\u4e1a\u52a1\uff08\u5982\u91d1\u878d\u3001\u652f\u4ed8\uff09<\/td><\/tr>
              2<\/td>\u7ea617\u79d2<\/td>\u4e2d\u7b49<\/td>\u4f4e\uff08\u4ec5\u4e22\u5931\u64cd\u4f5c\u7cfb\u7edf\u7f13\u5b58\u6570\u636e\uff09<\/td>\u975e\u6838\u5fc3\u4f46\u9700\u4f4e\u4e22\u5931\u573a\u666f<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n\n\n
              2.3 \u5b9e\u9a8c\u7ed3\u8bba<\/h3>\n\n\n\n
                \n
              • \u5237\u76d8\u9891\u7387\u8d8a\u9ad8\uff0c\u6027\u80fd\u635f\u8017\u8d8a\u5927\uff1afsync()<\/code>\u7cfb\u7edf\u8c03\u7528\u662f\u6027\u80fd\u74f6\u9888\uff08\u673a\u68b0\u786c\u76d8\u5c24\u751a\uff09<\/li>\n\n\n\n
              •  \u914d\u7f6e 1 \u7684\u5b89\u5168\u6027\u65e0\u61c8\u53ef\u51fb\uff0c\u4f46\u9700\u727a\u7272\u7ea6 60% \u7684\u6027\u80fd <\/li>\n\n\n\n
              • \u914d\u7f6e 0 \u548c 2 \u901a\u8fc7\u51cf\u5c11\u5237\u76d8\u6b21\u6570\u63d0\u5347\u6027\u80fd\uff0c\u4f46\u5b58\u5728\u6570\u636e\u4e22\u5931\u98ce\u9669<\/li>\n<\/ul>\n\n\n\n
                <\/p>\n\n\n\n
                \u4e09\u3001\u914d\u7f6e\u9009\u578b\uff1a\u4e1a\u52a1\u573a\u666f\u51b3\u5b9a\u6700\u4f18\u89e3<\/h2>\n\n\n\n
                3.1 \u7efc\u5408\u5bf9\u6bd4\u8868<\/h3>\n\n\n\n
                \u914d\u7f6e\u503c<\/th>\u6838\u5fc3\u7279\u70b9<\/th>\u9002\u7528\u573a\u666f<\/th>\u7981\u5fcc\u573a\u666f<\/th><\/tr><\/thead>
                0<\/td>\u6027\u80fd\u6700\u4f18\uff0c\u5b89\u5168\u6027\u6700\u4f4e<\/td>\u975e\u6838\u5fc3\u4e1a\u52a1\uff08\u65e5\u5fd7\u5b58\u50a8\u3001\u76d1\u63a7\u6570\u636e\uff09\u3001\u5141\u8bb8\u5c11\u91cf\u6570\u636e\u4e22\u5931<\/td>\u91d1\u878d\u652f\u4ed8\u3001\u6838\u5fc3\u4ea4\u6613\u7cfb\u7edf<\/td><\/tr>
                1<\/td>\u5b89\u5168\u6027\u6700\u9ad8\uff0c\u6027\u80fd\u6700\u5dee<\/td>\u91d1\u878d\u3001\u7535\u5546\u652f\u4ed8\u3001\u653f\u52a1\u7cfb\u7edf\u7b49\u6838\u5fc3\u4e1a\u52a1<\/td>\u975e\u6838\u5fc3\u4f4e\u4f18\u5148\u7ea7\u670d\u52a1\uff08\u8d44\u6e90\u6d6a\u8d39\uff09<\/td><\/tr>
                2<\/td>\u6027\u80fd\u4e0e\u5b89\u5168\u5e73\u8861<\/td>\u666e\u901a\u4e1a\u52a1\u7cfb\u7edf\u3001\u975e\u6838\u5fc3\u4ea4\u6613\uff08\u5982\u8ba2\u5355\u5386\u53f2\uff09<\/td>\u865a\u62df\u673a \/ \u4e91\u670d\u52a1\u5668\uff08OS \u5d29\u6e83\u98ce\u9669\u9ad8\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
                3.2 \u5173\u952e\u6ce8\u610f\u4e8b\u9879<\/h4>\n\n\n\n
                  \n
                1. \u4e91\u670d\u52a1\u5668 \/ \u865a\u62df\u673a\u614e\u9009\u914d\u7f6e 2<\/strong>\uff1a\u7531\u4e8e\u865a\u62df\u5316\u73af\u5883\u7684 OS \u7f13\u5b58\u7a33\u5b9a\u6027\u4f4e\u4e8e\u7269\u7406\u673a\uff0c\u82e5\u53d1\u751f\u865a\u62df\u673a\u5d29\u6e83\uff0c\u914d\u7f6e 2 \u53ef\u80fd\u4e22\u5931\u8fd1 1 \u79d2\u6570\u636e\uff0c\u5efa\u8bae\u76f4\u63a5\u4f7f\u7528\u914d\u7f6e 1\u3002<\/li>\n\n\n\n
                2. \u6027\u80fd\u4f18\u5316\u66ff\u4ee3\u65b9\u6848<\/strong>\uff1a\u82e5\u4e1a\u52a1\u9700\u8981\u9ad8\u6027\u80fd\u4e14\u4e0d\u80fd\u63a5\u53d7\u6570\u636e\u4e22\u5931\uff0c\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u4f18\u5316\uff1a\n
                    \n
                  • \u542f\u7528innodb_log_group_home_dir<\/code>\uff0c\u5c06 Redo Log \u5b58\u50a8\u5728\u9ad8\u901f SSD<\/li>\n\n\n\n
                  • \u8c03\u6574innodb_log_buffer_size<\/code>\uff08\u9ed8\u8ba4 16M\uff09\uff0c\u51cf\u5c11\u5c0f\u4e8b\u52a1\u7684\u5237\u76d8\u6b21\u6570<\/li>\n\n\n\n
                  • \u6279\u91cf\u63d0\u4ea4\u4e8b\u52a1\uff08\u800c\u975e\u5355\u6761\u63d2\u5165\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
                    \u56db\u3001\u603b\u7ed3\uff1a\u6ca1\u6709\u6700\u4f18\u914d\u7f6e\uff0c\u53ea\u6709\u6700\u9002\u5408\u7684\u9009\u62e9<\/h2>\n\n\n\n
                    Redo Log \u7684\u843d\u76d8\u673a\u5236\u672c\u8d28\u662f\u6027\u80fd\u4e0e\u5b89\u5168\u6027\u7684\u6743\u8861<\/strong>\uff1a<\/p>\n\n\n\n
                      \n
                    • \u8ffd\u6c42\u7edd\u5bf9\u5b89\u5168\uff08\u5982\u91d1\u878d\u573a\u666f\uff09\uff1a\u6beb\u4e0d\u72b9\u8c6b\u9009\u62e9\u914d\u7f6e 1\uff08innodb_flush_log_at_trx_commit=1<\/code>\uff09 <\/li>\n\n\n\n
                    • \u8ffd\u6c42\u6781\u81f4\u6027\u80fd\uff08\u5982\u65e5\u5fd7\u5b58\u50a8\uff09\uff1a\u914d\u7f6e 0 \u662f\u6700\u4f18\u89e3\uff0c\u4f46\u9700\u63a5\u53d7\u6570\u636e\u4e22\u5931\u98ce\u9669 <\/li>\n\n\n\n
                    • \u666e\u901a\u4e1a\u52a1\u573a\u666f\uff1a\u914d\u7f6e 2 \u662f\u5e73\u8861\u4e4b\u9009\uff0c\u4f46\u9700\u6ce8\u610f\u90e8\u7f72\u73af\u5883\uff08\u7269\u7406\u673a\u4f18\u5148\uff09<\/li>\n<\/ul>\n\n\n\n
                      \u7406\u89e3 Redo Log \u7684\u843d\u76d8\u673a\u5236\uff0c\u4e0d\u4ec5\u80fd\u5e2e\u52a9\u6211\u4eec\u89e3\u51b3\u6570\u636e\u5e93\u6027\u80fd\u74f6\u9888\uff0c\u66f4\u80fd\u5728\u67b6\u6784\u8bbe\u8ba1\u65f6\u505a\u51fa\u7b26\u5408\u4e1a\u52a1\u7279\u6027\u7684\u6280\u672f\u9009\u578b \u2014\u2014 \u8fd9\u6b63\u662f MySQL \u5e95\u5c42\u539f\u7406\u5b66\u4e60\u7684\u6838\u5fc3\u4ef7\u503c\u6240\u5728\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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