{"id":418,"date":"2026-02-04T21:41:33","date_gmt":"2026-02-04T13:41:33","guid":{"rendered":"http:\/\/47.100.165.17\/wordpress\/?p=418"},"modified":"2026-02-04T21:41:33","modified_gmt":"2026-02-04T13:41:33","slug":"%e3%80%90mysql%e3%80%91redo-log-%e6%b7%b1%e5%ba%a6%e8%a7%a3%e6%9e%90%ef%bc%9a%e4%bb%8e%e5%8e%9f%e7%90%86%e5%88%b0%e5%ae%9e%e6%88%98%ef%bc%8c%e4%bf%9d%e9%9a%9c%e4%ba%8b%e5%8a%a1%e6%8c%81%e4%b9%85","status":"publish","type":"post","link":"https:\/\/yunyanglib.cn\/?p=418","title":{"rendered":"\u3010MySQL\u3011Redo Log \u6df1\u5ea6\u89e3\u6790\uff1a\u4ece\u539f\u7406\u5230\u5b9e\u6218\uff0c\u4fdd\u969c\u4e8b\u52a1\u6301\u4e45\u6027"},"content":{"rendered":"\n

\u5728 MySQL \u6570\u636e\u5e93\u4e2d\uff0c\u4e8b\u52a1\u7684\u6301\u4e45\u6027\uff08ACID \u4e2d\u7684 D\uff09\u662f\u6570\u636e\u53ef\u9760\u6027\u7684\u6838\u5fc3\u4fdd\u969c \u2014\u2014 \u5373\u4f7f\u906d\u9047\u6570\u636e\u5e93\u5d29\u6e83\u3001\u670d\u52a1\u5668\u65ad\u7535\u7b49\u7a81\u53d1\u6545\u969c\uff0c\u5df2\u63d0\u4ea4\u7684\u4e8b\u52a1\u4e5f\u4e0d\u80fd\u4e22\u5931\u3002\u800c InnoDB \u5b58\u50a8\u5f15\u64ce\u5b9e\u73b0\u8fd9\u4e00\u7279\u6027\u7684\u5173\u952e\uff0c\u6b63\u662f\u91cd\u505a\u65e5\u5fd7\uff08Redo Log\uff09<\/strong>\u3002<\/p>\n\n\n\n

\u4e0d\u540c\u4e8e\u8bb0\u5f55 SQL \u903b\u8f91\u7684 Binlog\uff0cRedo Log \u662f\u7269\u7406\u65e5\u5fd7\uff0c\u76f4\u63a5\u8bb0\u5f55\u6570\u636e\u9875\u7684\u4fee\u6539\u7ec6\u8282\u3002\u672c\u6587\u5c06\u4ece\u539f\u7406\u3001\u6838\u5fc3\u673a\u5236\u3001\u914d\u7f6e\u4f18\u5316\u5230\u5d29\u6e83\u6062\u590d\uff0c\u5168\u9762\u62c6\u89e3 Redo Log\uff0c\u5e2e\u4f60\u5f7b\u5e95\u641e\u61c2\u5b83\u5982\u4f55\u5b88\u62a4\u6570\u636e\u5b89\u5168\u3002<\/p>\n\n\n\n

\u4e00\u3001Redo Log \u6838\u5fc3\u6982\u5ff5\uff1a\u89e3\u51b3\u4ec0\u4e48\u95ee\u9898\uff1f\u8bb0\u5f55\u4ec0\u4e48\u5185\u5bb9\uff1f<\/h2>\n\n\n\n

1.1 \u4e3a\u4ec0\u4e48\u9700\u8981 Redo Log\uff1f<\/h3>\n\n\n\n

InnoDB \u4e3a\u4e86\u63d0\u5347\u8bfb\u5199\u6027\u80fd\uff0c\u8bbe\u8ba1\u4e86\u300c\u7f13\u51b2\u6c60\uff08Buffer Pool\uff09\u300d\u673a\u5236\uff1a<\/p>\n\n\n\n

    \n
  • \u6570\u636e\u8bfb\u5199\u4f18\u5148\u64cd\u4f5c\u7f13\u51b2\u6c60\u4e2d\u7684\u5185\u5b58\u6570\u636e\u9875\uff0c\u800c\u975e\u76f4\u63a5\u8bbf\u95ee\u78c1\u76d8\uff08\u78c1\u76d8 IO \u901f\u5ea6\u6bd4\u5185\u5b58\u6162\u6570\u767e\u500d\uff09\uff1b<\/li>\n\n\n\n
  • \u88ab\u4fee\u6539\u7684\u5185\u5b58\u6570\u636e\u9875\uff08\u810f\u9875\uff09\u4f1a\u5b9a\u671f\u5237\u5165\u78c1\u76d8\uff0c\u800c\u975e\u5b9e\u65f6\u5199\u5165\u3002<\/li>\n<\/ul>\n\n\n\n

    \u8fd9\u5c31\u5e26\u6765\u4e00\u4e2a\u81f4\u547d\u95ee\u9898\uff1a\u5982\u679c\u6570\u636e\u5e93\u5d29\u6e83\u65f6\uff0c\u810f\u9875\u5c1a\u672a\u5237\u76d8\uff0c\u4fee\u6539\u7684\u6570\u636e\u4f1a\u6c38\u4e45\u4e22\u5931\u3002\u800c Redo Log \u6b63\u662f\u4e3a\u89e3\u51b3\u6b64\u95ee\u9898\u800c\u751f \u2014\u2014 \u5b83\u5b9e\u65f6\u8bb0\u5f55\u6570\u636e\u9875\u7684\u4fee\u6539\uff0c\u5d29\u6e83\u540e\u53ef\u901a\u8fc7\u91cd\u653e\u65e5\u5fd7\u6062\u590d\u672a\u5237\u76d8\u7684\u810f\u9875\u6570\u636e\u3002<\/p>\n\n\n\n

    1.2 Redo Log \u8bb0\u5f55\u7684\u5185\u5bb9<\/h3>\n\n\n\n

    Redo Log \u662f\u7269\u7406\u65e5\u5fd7<\/strong>\uff0c\u4e0d\u8bb0\u5f55 SQL \u8bed\u53e5\u6216\u884c\u6570\u636e\uff0c\u4ec5\u8bb0\u5f55\u300c\u6570\u636e\u9875\u7684\u5177\u4f53\u53d8\u66f4\u300d\u3002\u4f8b\u5982\u6267\u884c\uff1a<\/p>\n\n\n\n

    update user set name='test' where id=1;<\/code><\/pre>\n\n\n\n
    Redo Log \u4f1a\u8bb0\u5f55\uff1a<\/p>\n\n\n\n
    \n
    \u6570\u636e\u9875\u53f7\uff1a100\uff0c\u504f\u79fb\u91cf\uff1a200\uff0c\u4fee\u6539\u524d\u503c\uff1a’old’\uff0c\u4fee\u6539\u540e\u503c\uff1a’test’<\/p>\n<\/blockquote>\n\n\n\n
    \u8fd9\u79cd\u8bb0\u5f55\u65b9\u5f0f\u7684\u4f18\u52bf\u662f\uff1a\u91cd\u653e\u901f\u5ea6\u5feb\uff08\u76f4\u63a5\u64cd\u4f5c\u6570\u636e\u9875\uff09\uff0c\u6062\u590d\u6548\u7387\u9ad8\u3002<\/p>\n\n\n\n
    \u4e8c\u3001Redo Log \u5173\u952e\u673a\u5236\uff1a\u4e24\u9636\u6bb5\u63d0\u4ea4\u4e0e\u53cc\u5199<\/h2>\n\n\n\n
    2.1 \u4e24\u9636\u6bb5\u63d0\u4ea4\uff1a\u4fdd\u969c Binlog \u4e0e Redo Log \u4e00\u81f4\u6027<\/h3>\n\n\n\n
    MySQL \u4e2d Binlog\uff08\u5f52\u6863\u65e5\u5fd7\uff09\u7528\u4e8e\u4e3b\u4ece\u590d\u5236\u548c\u6570\u636e\u5907\u4efd\uff0cRedo Log \u7528\u4e8e\u5d29\u6e83\u6062\u590d\u3002\u82e5\u4e24\u8005\u8bb0\u5f55\u7684\u4e8b\u52a1\u4e0d\u4e00\u81f4\uff0c\u4f1a\u5bfc\u81f4\u4e3b\u4ece\u6570\u636e\u540c\u6b65\u5931\u8d25\u3002\u56e0\u6b64\u5f15\u5165\u4e24\u9636\u6bb5\u63d0\u4ea4<\/strong>\uff1a<\/p>\n\n\n\n
    \u9636\u6bb5<\/td>\u64cd\u4f5c<\/td>\u5173\u952e\u72b6\u6001<\/td><\/tr>
    \u51c6\u5907\u9636\u6bb5\uff08Prepare\uff09<\/td>1. \u4e8b\u52a1\u6267\u884c\u5b8c\u6210 \uff1b
    2. \u5c06\u4fee\u6539\u8bb0\u5f55\u5199\u5165 Redo Log \u5e76\u5237\u76d8  \uff1b
    3. \u6807\u8bb0 Redo Log \u4e3a\u300cPrepare \u72b6\u6001\u300d <\/td>    		Redo Log \u5df2\u6301\u4e45\u5316\uff0cBinlog \u672a\u5199\u5165<\/td><\/tr>
    \u63d0\u4ea4\u9636\u6bb5\uff08Commit\uff09<\/td>1. \u5199\u5165 Binlog \u5e76\u5237\u76d8 \uff1b
    2.\u82e5 Binlog \u5237\u76d8\u6210\u529f\uff0c\u6807\u8bb0 Redo Log \u4e3a\u300cCommit \u72b6\u6001\u300d\uff1b
    3. \u82e5 Binlog \u5931\u8d25\uff0c\u4e8b\u52a1\u56de\u6eda<\/td>    		\u4e24\u8005\u72b6\u6001\u4e00\u81f4\uff08\u5747\u6210\u529f\u6216\u5747\u5931\u8d25\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \u6838\u5fc3\u76ee\u7684<\/strong>\uff1a\u786e\u4fdd\u5d29\u6e83\u540e\u8981\u4e48\u4e24\u8005\u90fd\u6709\u5b8c\u6574\u8bb0\u5f55\uff0c\u8981\u4e48\u90fd\u6ca1\u6709\uff0c\u907f\u514d\u6570\u636e\u4e0d\u4e00\u81f4\u3002<\/p>\n\n\n\n
    2.2 \u53cc\u5199\uff1a\u907f\u514d\u6570\u636e\u9875\u635f\u574f<\/h3>\n\n\n\n
    Redo Log \u91cd\u653e\u7684\u524d\u63d0\u662f\u6570\u636e\u9875\u5b8c\u6574\u3002\u82e5\u810f\u9875\u5237\u76d8\u8fc7\u7a0b\u4e2d\u5d29\u6e83\uff08\u5982\u65ad\u7535\uff09\uff0c\u4f1a\u5bfc\u81f4\u6570\u636e\u9875\u300c\u90e8\u5206\u5199\u5165\u300d\uff08\u635f\u574f\uff09\uff0cRedo Log \u65e0\u6cd5\u91cd\u653e\u3002InnoDB \u7684\u300c\u53cc\u5199\u673a\u5236\u300d\u89e3\u51b3\u6b64\u95ee\u9898\uff1a<\/p>\n\n\n\n
      \n
    1. \u810f\u9875\u5237\u76d8\u524d\uff0c\u5148\u5c06\u5b8c\u6574\u6570\u636e\u9875\u5199\u5165\u300c\u53cc\u5199\u7f13\u51b2\u533a\u300d\uff08\u5185\u5b58\uff09\uff1b<\/li>\n\n\n\n
    2. \u628a\u53cc\u5199\u7f13\u51b2\u533a\u7684\u6570\u636e\u5237\u5165\u78c1\u76d8\u7684\u300c\u53cc\u5199\u6587\u4ef6\u300d\uff08\u5171\u4eab\u8868\u7a7a\u95f4\u4e2d\u7684\u7269\u7406\u6587\u4ef6\uff09\uff1b<\/li>\n\n\n\n
    3. \u786e\u8ba4\u53cc\u5199\u6587\u4ef6\u5199\u5165\u6210\u529f\u540e\uff0c\u518d\u5c06\u810f\u9875\u5237\u5165\u5b9e\u9645\u6570\u636e\u6587\u4ef6\uff1b<\/li>\n\n\n\n
    4. \u5d29\u6e83\u540e\u6062\u590d\uff1a\u4ece\u53cc\u5199\u6587\u4ef6\u8bfb\u53d6\u5b8c\u6574\u6570\u636e\u9875\uff0c\u4fee\u590d\u635f\u574f\u7684\u5b9e\u9645\u6570\u636e\u9875\uff0c\u518d\u91cd\u653e Redo Log\u3002<\/li>\n<\/ol>\n\n\n\n
      \u4e09\u3001Redo Log \u914d\u7f6e\u5b9e\u6218\uff1a\u53c2\u6570\u4f18\u5316\u4e0e\u8def\u5f84\u8c03\u6574<\/h2>\n\n\n\n
      3.1 \u914d\u7f6e Redo Log \u5bb9\u91cf\uff08\u6838\u5fc3\u4f18\u5316\uff09<\/h3>\n\n\n\n
      \u5bb9\u91cf\u8fc7\u5c0f\u4f1a\u5bfc\u81f4\u9891\u7e41\u5207\u6362\u65e5\u5fd7\uff08\u89e6\u53d1 checkpoint\uff0c\u5237\u76d8\u9891\u7e41\uff09\uff1b\u5bb9\u91cf\u8fc7\u5927\u5219\u5d29\u6e83\u6062\u590d\u65f6\u95f4\u53d8\u957f\uff0c\u5efa\u8bae\u603b\u5bb9\u91cf 4G~8G<\/strong>\u3002<\/p>\n\n\n\n
        \n
      • MySQL 8.0.30 \u4e4b\u524d\u7248\u672c<\/strong>\uff1a
        \u901a\u8fc7 innodb_log_file_size<\/code>\uff08\u5355\u4e2a\u6587\u4ef6\u5927\u5c0f\uff09\u4e0e innodb_log_files_in_group<\/code>\uff08\u6587\u4ef6\u6570\u91cf\uff09\u63a7\u5236\u603b\u5bb9\u91cf\uff1a<\/li>\n<\/ul>\n\n\n\n
        -- \u67e5\u770b\u5f53\u524d\u914d\u7f6e\nshow global variables like \"innodb_log_file%\";\n\n-- \u914d\u7f6e\u793a\u4f8b\uff08\u603b\u5bb9\u91cf = 2 * 2G = 4G\uff09\nvim \/data\/mysql\/conf\/my.cnf\ninnodb_log_file_size = 2G      # \u5355\u4e2a\u6587\u4ef6\u5927\u5c0f\uff08\u5efa\u8bae\u4e0d\u8d85\u8fc7 4G\uff09\ninnodb_log_files_in_group = 2  # \u6587\u4ef6\u6570\u91cf\uff08\u9ed8\u8ba4 2\uff0c\u65e0\u9700\u4fee\u6539\uff09\n\n-- \u91cd\u542f\u751f\u6548\uff08\u9700\u5907\u4efd\u65e7\u65e5\u5fd7\uff09\nmv \/data\/mysql\/data\/ib_logfile* \/data\/mysql\/backup\/\n\/etc\/init.d\/mysql.server restart<\/code><\/pre>\n\n\n\n
        \"\"<\/figure>\n\n\n\n
          \n
        • MySQL 8.0.30 \u53ca\u4e4b\u540e\u7248\u672c<\/strong>\uff1a
          \u65b0\u589e innodb_redo_log_capacity<\/code> \u53c2\u6570\uff0c\u76f4\u63a5\u63a7\u5236\u603b\u5bb9\u91cf\uff08\u7b80\u5316\u914d\u7f6e\uff09\uff1a<\/li>\n<\/ul>\n\n\n\n
          -- \u67e5\u770b\u5f53\u524d\u603b\u5bb9\u91cf\nshow global variables like \"innodb_redo_log_capacity\";\n\n-- \u914d\u7f6e\u603b\u5bb9\u91cf\u4e3a 4G\uff08\u65e0\u9700\u5173\u5fc3\u6587\u4ef6\u6570\u91cf\uff0cMySQL \u81ea\u52a8\u7ba1\u7406\uff09\nvim \/data\/mysql\/conf\/my.cnf\ninnodb_redo_log_capacity = 4G\n\n-- \u91cd\u542f\u751f\u6548\n\/etc\/init.d\/mysql.server restart<\/code><\/pre>\n\n\n\n
          3.2 \u914d\u7f6e Redo Log \u5b58\u50a8\u8def\u5f84<\/h3>\n\n\n\n
          \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cRedo Log \u6587\u4ef6\uff08ib_logfile0<\/code>\u3001ib_logfile1<\/code>\uff09\u5b58\u50a8\u5728\u6570\u636e\u76ee\u5f55\uff08\u5982 \/data\/mysql\/data\/<\/code>\uff09\uff0c\u5efa\u8bae\u653e\u5728\u72ec\u7acb SSD \u78c1\u76d8<\/strong>\uff08\u51cf\u5c11 IO \u7ade\u4e89\uff09\uff1a<\/p>\n\n\n\n
          -- \u67e5\u770b\u5f53\u524d\u8def\u5f84\nshow global variables like \"innodb_log_group_home_dir\";\n\n-- \u914d\u7f6e\u65b0\u8def\u5f84\nvim \/data\/mysql\/conf\/my.cnf\ninnodb_log_group_home_dir = \/data\/mysql\/redo_log\/  # \u65b0\u8def\u5f84\n\n-- \u521b\u5efa\u76ee\u5f55\u5e76\u6388\u6743\nmkdir -p \/data\/mysql\/redo_log\/\nchown -R mysql.mysql \/data\/mysql\/redo_log\/\n\n-- \u8fc1\u79fb\u65e7\u65e5\u5fd7\u5e76\u91cd\u542f\nmv \/data\/mysql\/data\/ib_logfile* \/data\/mysql\/redo_log\/\n\/etc\/init.d\/mysql.server restart<\/code><\/pre>\n\n\n\n
          \u56db\u3001\u5d29\u6e83\u6062\u590d\u6d41\u7a0b\uff1aRedo Log \u5982\u4f55\u5de5\u4f5c\uff1f<\/h2>\n\n\n\n
          MySQL \u5d29\u6e83\u540e\u91cd\u542f\uff0cInnoDB \u4f1a\u81ea\u52a8\u6267\u884c\u5d29\u6e83\u6062\u590d\uff0c\u6838\u5fc3\u4f9d\u8d56 Redo Log\uff1a<\/p>\n\n\n\n
            \n
          1. \u5206\u6790\u9636\u6bb5<\/strong>\uff1a\u626b\u63cf Redo Log\uff0c\u8bc6\u522b\u6240\u6709\u5904\u4e8e\u300cPrepare \u72b6\u6001\u300d\u548c\u300cCommit \u72b6\u6001\u300d\u7684\u4e8b\u52a1\u3002<\/li>\n\n\n\n
          2. \u91cd\u505a\u9636\u6bb5<\/strong>\uff1a\u91cd\u653e\u6240\u6709\u300cPrepare \u72b6\u6001\u4e14 Binlog \u5df2\u5199\u5165\u300d\uff08\u89c6\u4e3a\u63d0\u4ea4\uff0c\u9700\u6062\u590d\uff09\u548c\u300cCommit \u72b6\u6001\u300d\uff08\u5df2\u63d0\u4ea4\uff0c\u9700\u6062\u590d\u810f\u9875\uff09\u7684\u4e8b\u52a1\uff08\u901a\u8fc7 Redo Log \u6062\u590d\u6570\u636e\u9875\u4fee\u6539\uff09\u3002<\/li>\n\n\n\n
          3. \u56de\u6eda\u9636\u6bb5<\/strong>\uff1a\u56de\u6eda\u6240\u6709\u300cPrepare \u72b6\u6001\u4f46 Binlog \u672a\u5199\u5165\u300d\u7684\u4e8b\u52a1\uff08\u901a\u8fc7 Undo Log \u64a4\u9500\u4fee\u6539\uff09\u3002<\/li>\n<\/ol>\n\n\n\n
            \u901a\u8fc7\u4ee5\u4e0a\u6d41\u7a0b\uff0c\u786e\u4fdd\u5d29\u6e83\u540e\u6570\u636e\u65e2\u4e0d\u4e22\u5931\uff08\u5df2\u63d0\u4ea4\u4e8b\u52a1\u901a\u8fc7 Redo Log \u6062\u590d\uff09\uff0c\u4e5f\u4e0d\u51fa\u73b0\u810f\u6570\u636e\uff08\u672a\u63d0\u4ea4\u4e8b\u52a1\u901a\u8fc7 Undo Log \u56de\u6eda\uff09\u3002<\/p>\n\n\n\n
            \u4e94\u3001Redo Log \u6700\u4f73\u5b9e\u8df5<\/h2>\n\n\n\n
              \n
            1. \u5bb9\u91cf\u914d\u7f6e<\/strong>\uff1a\u603b\u5bb9\u91cf 4G~8G\uff0c\u5355\u4e2a\u6587\u4ef6\u4e0d\u8d85\u8fc7 4G\uff08\u5e73\u8861\u6027\u80fd\u4e0e\u6062\u590d\u65f6\u95f4\uff09\uff1b<\/li>\n\n\n\n
            2. \u5b58\u50a8\u5206\u79bb<\/strong>\uff1a\u5c06 Redo Log \u653e\u5728\u72ec\u7acb SSD \u78c1\u76d8\uff0c\u907f\u514d\u4e0e\u6570\u636e\u6587\u4ef6\u3001Binlog \u5171\u4eab IO \u8d44\u6e90\uff1b<\/li>\n\n\n\n
            3. \u76d1\u63a7\u4f7f\u7528\u7387<\/strong>\uff1a\u4f7f\u7528\u00a0SHOW ENGINE INNODB STATUS\\G\u00a0<\/code>\u547d\u4ee4\uff0c\u5728\u8f93\u51fa\u4e2d\u8ba1\u7b97\u00a0(Log sequence number - Last checkpoint at) \/ innodb_log_file_size * innodb_log_files_in_group\u00a0<\/code>\u6765\u4f30\u7b97\u4f7f\u7528\u7387\u3002\u82e5\u957f\u671f\u8d85\u8fc780%<\/strong>\uff0c\u5219\u9700\u8003\u8651\u589e\u5927\u5bb9\u91cf\u3002<\/li>\n<\/ol>\n\n\n\n
                \n
              1. \u907f\u514d\u9891\u7e41\u5207\u6362<\/strong>\uff1a\u901a\u8fc7\u5468\u671f\u6027\u5730\u67e5\u8be2\u00a0Innodb_os_log_written<\/code>\u00a0\u72b6\u6001\u503c\u8ba1\u7b97\u6bcf\u79d2\u5199\u5165\u91cf\uff0c\u82e5\u8be5\u503c\u6301\u7eed\u8fbe\u5230\u603b\u5bb9\u91cf\u7684\u8f83\u9ad8\u6bd4\u4f8b\uff0c\u6216\u00a0History list length<\/code>\u00a0\u6301\u7eed\u8fc7\u9ad8\uff0c\u8bf4\u660e\u5bb9\u91cf\u53ef\u80fd\u4e0d\u8db3\uff0c\u9700\u6269\u5bb9\u3002<\/li>\n<\/ol>\n\n\n\n
                <\/p>\n\n\n\n
                \u603b\u7ed3<\/h3>\n\n\n\n
                Redo Log \u662f InnoDB \u4fdd\u969c\u4e8b\u52a1\u6301\u4e45\u6027\u7684\u6838\u5fc3\u673a\u5236\uff0c\u901a\u8fc7\u7269\u7406\u65e5\u5fd7\u8bb0\u5f55\u6570\u636e\u9875\u53d8\u66f4\u3001\u4e24\u9636\u6bb5\u63d0\u4ea4\u4fdd\u969c\u65e5\u5fd7\u4e00\u81f4\u6027\u3001\u53cc\u5199\u673a\u5236\u907f\u514d\u6570\u636e\u9875\u635f\u574f\uff0c\u6700\u7ec8\u5b9e\u73b0\u5d29\u6e83\u540e\u7684\u6570\u636e\u6062\u590d\u3002<\/p>\n\n\n\n
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