{"id":1068,"date":"2026-03-24T16:54:28","date_gmt":"2026-03-24T08:54:28","guid":{"rendered":"https:\/\/yunyanglib.cn\/?p=1068"},"modified":"2026-03-24T16:54:29","modified_gmt":"2026-03-24T08:54:29","slug":"%e3%80%90mysql%e3%80%91mysql%e5%a4%a7%e8%a1%a8%e7%bb%93%e6%9e%84%e5%8f%98%e6%9b%b4%e7%a5%9e%e5%99%a8%ef%bc%9apt-online-schema-change%e5%ae%9e%e6%88%98%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/yunyanglib.cn\/?p=1068","title":{"rendered":"\u3010MySQL\u3011MySQL\u5927\u8868\u7ed3\u6784\u53d8\u66f4\u795e\u5668\uff1apt-online-schema-change\u5b9e\u6218\u6307\u5357"},"content":{"rendered":"\n

\u5927\u5bb6\u597d\uff0c\u6211\u662f\u4e91\u626c\uff5e \u4eca\u5929\u6765\u804a MySQL \u8fd0\u7ef4\u4e2d\u7684\u4e00\u4e2a\u7ecf\u5178\u75db\u70b9\uff1a\u5927\u8868\u7ed3\u6784\u4fee\u6539<\/strong>\u3002\u76f8\u4fe1\u4e0d\u5c11\u8fd0\u7ef4\u540c\u5b66\u90fd\u8e29\u8fc7\u4f20\u7edfALTER TABLE<\/code>\u7684\u5751 \u2014\u2014 \u9501\u8868\u671f\u95f4\u4e1a\u52a1\u8bfb\u5199\u963b\u585e\uff0c\u670d\u52a1\u76f4\u63a5\u4e0d\u53ef\u7528\uff0c\u5c24\u5176\u662f InnoDB \u5f15\u64ce\u5728 5.7 \u53ca\u66f4\u65e9\u7248\u672c\uff0c\u7b80\u76f4\u662f\u751f\u4ea7\u73af\u5883\u7684 \u201c\u5b9a\u65f6\u70b8\u5f39\u201d\u3002<\/p>\n\n\n\n

\u5076\u7136\u63a5\u89e6\u5230 Percona Toolkit \u7684pt-online-schema-change<\/code>\uff08\u7b80\u79f0 pt-osc\uff09\u540e\uff0c\u5f7b\u5e95\u89e3\u51b3\u4e86\u8fd9\u4e2a\u96be\u9898\u3002\u5b83\u80fd\u5728\u4e0d\u9501\u8868\u7684\u524d\u63d0\u4e0b\u5b89\u5168\u4fee\u6539\u8868\u7ed3\u6784\uff0c\u582a\u79f0\u5927\u8868\u8fd0\u7ef4\u7684 \u201c\u795e\u5668\u201d\u3002\u4eca\u5929\u5c31\u628a\u6211\u5b9e\u6218\u603b\u7ed3\u7684\u5b8c\u6574\u6307\u5357\u5206\u4eab\u51fa\u6765\uff0c\u4ece\u5de5\u5177\u9009\u578b\u3001\u73af\u5883\u642d\u5efa\u5230\u907f\u5751\u6280\u5de7\uff0c\u4e00\u6587\u5e26\u4f60\u5403\u900f pt-osc\uff01<\/p>\n\n\n\n

\u4e00\u3001\u5148\u641e\u61c2\uff1aPercona Toolkit \u6709\u54ea\u4e9b\u5b9d\u85cf\u5de5\u5177\uff1f<\/h2>\n\n\n\n

\u4f5c\u4e3a MySQL \u8fd0\u7ef4\u7684 \u201c\u745e\u58eb\u519b\u5200\u201d\uff0cPercona Toolkit \u4e0d\u6b62 pt-osc \u4e00\u4e2a\u5b9e\u7528\u5de5\u5177\uff0c\u6574\u7406\u4e86\u9ad8\u9891\u5de5\u5177\u6e05\u5355\u4f9b\u5927\u5bb6\u53c2\u8003\uff1a<\/p>\n\n\n\n

PT \u5de5\u5177<\/th>\u6838\u5fc3\u4f5c\u7528<\/th><\/tr><\/thead>
pt-online-schema-change<\/td>\u4e0d\u9501\u8868\u4fee\u6539\u8868\u7ed3\u6784\uff08\u672c\u6587\u6838\u5fc3\uff09<\/td><\/tr>
pt-query-digest<\/td>\u5206\u6790\u6162\u67e5\u8be2\u65e5\u5fd7\uff0c\u5b9a\u4f4d\u6027\u80fd\u74f6\u9888<\/td><\/tr>
pt-kill<\/td>\u6279\u91cf\u7ec8\u6b62\u6162\u67e5\u8be2 \/ \u957f\u4e8b\u52a1\uff0c\u91ca\u653e\u8d44\u6e90<\/td><\/tr>
pt-table-checksum<\/td>\u6821\u9a8c\u4e3b\u4ece\u590d\u5236\u6570\u636e\u4e00\u81f4\u6027<\/td><\/tr>
pt-table-sync<\/td>\u540c\u6b65\u591a\u5b9e\u4f8b\u6570\u636e\uff0c\u4fee\u590d\u590d\u5236\u4e0d\u4e00\u81f4<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u5176\u4e2d pt-osc \u662f\u6211\u65e5\u5e38\u7528\u5f97\u6700\u591a\u7684\uff0c\u5c24\u5176\u9762\u5bf9\u5343\u4e07\u7ea7\u6570\u636e\u91cf\u7684\u4e1a\u52a1\u8868\uff0c\u6bcf\u6b21\u4fee\u6539\u90fd\u79bb\u4e0d\u5f00\u5b83\u3002<\/p>\n\n\n\n

\u4e8c\u3001\u73af\u5883\u51c6\u5907\u4e0e\u5b89\u88c5<\/h2>\n\n\n\n

1. \u5de5\u5177\u5b89\u88c5\uff08CentOS 7 \u4e3a\u4f8b\uff09<\/h3>\n\n\n\n
# \u4e0b\u8f7d\u6700\u65b0\u7a33\u5b9a\u7248\uff083.5.4\uff09\nwget https:\/\/downloads.percona.com\/downloads\/percona-toolkit\/3.5.4\/binary\/redhat\/7\/x86_64\/percona-toolkit-3.5.4-2.el7.x86_64.rpm\n\n# \u5b89\u88c5\u4f9d\u8d56\u5e76\u90e8\u7f72\nyum install -y percona-toolkit-3.5.4-2.el7.x86_64.rpm\n\n# \u9a8c\u8bc1\u5b89\u88c5\u6210\u529f\npt-online-schema-change --version\n<\/code><\/pre>\n\n\n\n
\n
\u8f93\u51fa pt-online-schema-change 3.5.4<\/code> \u5373\u8868\u793a\u5b89\u88c5\u5b8c\u6210<\/p>\n<\/blockquote>\n\n\n\n
\"\"<\/figure>\n\n\n\n
2. \u6743\u9650\u914d\u7f6e\u4e0e\u6d4b\u8bd5\u73af\u5883<\/h3>\n\n\n\n
\u521b\u5efa\u4e13\u7528\u64cd\u4f5c\u7528\u6237\uff08\u9700\u6388\u4e88\u8db3\u591f\u6743\u9650\uff09\uff1a<\/p>\n\n\n\n
CREATE USER 'pt_osc'@'localhost' IDENTIFIED WITH MYSQL_NATIVE_PASSWORD BY 'iUdy87G_caq';\n-- \u6838\u5fc3\u6743\u9650\uff1a\u5efa\u8868\/\u5220\u8868\/\u6539\u8868\/\u6570\u636e\u8bfb\u5199\/\u89e6\u53d1\u5668\/\u590d\u5236\u6743\u9650\nGRANT create,drop,alter,insert,delete,select,update,process,replication slave,trigger ON *.* TO 'pt_osc'@'localhost';\n<\/code><\/pre>\n\n\n\n
\u521b\u5efa\u6d4b\u8bd5\u8868\u7528\u4e8e\u5b9e\u64cd\uff1a<\/p>\n\n\n\n
USE maria;\nCREATE TABLE users_info (\n  id INT PRIMARY KEY,\n  name VARCHAR(50),\n  email VARCHAR(50)\n);\n-- \u63d2\u5165\u6d4b\u8bd5\u6570\u636e\nINSERT INTO users_info (id, name, email) VALUES \n(1, 'John', 'john@example.com'),\n(2, 'Jane', 'jane@example.com');\n<\/code><\/pre>\n\n\n\n
3. \u7248\u672c\u9002\u914d\u8bf4\u660e<\/h3>\n\n\n\n
MySQL \u7248\u672c<\/th>\u662f\u5426\u63a8\u8350 pt-osc\uff1f<\/th>\u66ff\u4ee3\u65b9\u6848<\/th><\/tr><\/thead>
5.5\/5.6<\/td>\u5f3a\u70c8\u63a8\u8350\uff08\u907f\u514d\u9501\u8868\uff09<\/td>\u65e0<\/td><\/tr>
5.7<\/td>\u63a8\u8350\uff08\u539f\u751f DDL \u8f83\u6162\uff09<\/td>–<\/td><\/tr>
8.0.12+<\/td>\u65b0\u589e\u5b57\u6bb5\u65e0\u9700\uff08\u539f\u751f\u652f\u6301 INSTANT \u52a0\u5217\uff09<\/td>ALTER TABLE ... ADD COLUMN ... ALGORITHM=INSTANT<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u4e8c\u3001\u6838\u5fc3\u539f\u7406\uff1apt-osc \u662f\u5982\u4f55\u5b9e\u73b0\u65e0\u9501\u6539\u8868\u7684\uff1f<\/h3>\n\n\n\n
\u5f88\u591a\u540c\u5b66\u597d\u5947 pt-osc \u4e3a\u4ec0\u4e48\u80fd\u4e0d\u9501\u8868\uff1f\u901a\u8fc7\u5f00\u542f MySQL \u7684 general log \u8ddf\u8e2a\u540e\uff0c\u53d1\u73b0\u5b83\u7684\u6838\u5fc3\u903b\u8f91\u662f \u201c\u95f4\u63a5\u4fee\u6539\u201d\uff0c\u6b65\u9aa4\u62c6\u89e3\u5982\u4e0b\uff1a<\/p>\n\n\n\n
    \n
  1. \u521b\u5efa\u4e34\u65f6\u8868<\/strong>\uff1a\u590d\u5236\u539f\u8868\u7ed3\u6784\u751f\u6210_users_info_new<\/code>\uff0c\u5728\u4e34\u65f6\u8868\u6267\u884c ALTER \u64cd\u4f5c<\/li>\n\n\n\n
  2. \u521b\u5efa\u89e6\u53d1\u5668<\/strong>\uff1a\u5728\u539f\u8868\u6dfb\u52a0 INSERT\/UPDATE\/DELETE \u89e6\u53d1\u5668\uff0c\u786e\u4fdd\u6570\u636e\u5b9e\u65f6\u540c\u6b65\u5230\u4e34\u65f6\u8868<\/li>\n\n\n\n
  3. \u6279\u91cf\u540c\u6b65\u6570\u636e<\/strong>\uff1a\u5206\u6279\u590d\u5236\u539f\u8868\u5386\u53f2\u6570\u636e\uff0c\u907f\u514d\u4e00\u6b21\u6027\u5360\u7528\u8fc7\u591a\u8d44\u6e90<\/li>\n\n\n\n
  4. \u539f\u5b50\u5207\u6362\u8868\u540d<\/strong>\uff1aRENAME TABLE \u4ea4\u6362\u539f\u8868\u548c\u4e34\u65f6\u8868\u540d\u79f0\uff08\u6beb\u79d2\u7ea7\u5b8c\u6210\uff09<\/li>\n\n\n\n
  5. \u6e05\u7406\u6b8b\u7559<\/strong>\uff1a\u5220\u9664\u5907\u4efd\u8868_users_info_old<\/code>\u548c\u89e6\u53d1\u5668\uff08\u5931\u8d25\u4f1a\u81ea\u52a8\u56de\u6eda\uff09<\/li>\n<\/ol>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \u8fd9\u4e2a\u6d41\u7a0b\u5b8c\u7f8e\u89c4\u907f\u4e86\u76f4\u63a5\u4fee\u6539\u539f\u8868\u7684\u9501\u8868\u95ee\u9898\uff0c\u5373\u4f7f\u4e2d\u9014\u5931\u8d25\u4e5f\u4e0d\u4f1a\u5f71\u54cd\u4e1a\u52a1\u6570\u636e\u3002<\/p>\n\n\n\n
    \n
    \u5b9e\u64cd\u9a8c\u8bc1\uff1a\u6267\u884c\u524d\u5f00\u542f general log\uff0c\u53ef\u89c2\u5bdf\u5b8c\u6574\u6d41\u7a0b<\/p>\n\n\n\n
    SET GLOBAL general_log = ON;\ntail -f \/data\/mysql\/log\/mysql-general.log  # \u5b9e\u65f6\u67e5\u770b\u6267\u884c\u65e5\u5fd7\n<\/code><\/pre>\n<\/blockquote>\n\n\n\n
    \u4e09\u3001\u9ad8\u9891\u573a\u666f\u5b9e\u6218\u7528\u6cd5<\/h2>\n\n\n\n
    1. \u65b0\u589e\u5b57\u6bb5<\/h3>\n\n\n\n
    pt-online-schema-change -u pt_osc -p 'iUdy87G_caq' \\\n  -S \/tmp\/mysql.sock \\\n  --alter \"ADD COLUMN age INT COMMENT '\u5e74\u9f84'\" \\\n  --execute D=maria,t=users_info<\/code><\/pre>\n\n\n\n
    2. \u5220\u9664\u5b57\u6bb5<\/h3>\n\n\n\n
    pt-online-schema-change -u pt_osc -p 'iUdy87G_caq' \\\n  -S \/tmp\/mysql.sock \\<\/span>\n  --alter \"DROP COLUMN age\" \\<\/span>\n  --execute D=maria,t=users_info<\/span><\/code><\/pre>\n\n\n\n
    3. \u4fee\u6539\u5217\u5c5e\u6027<\/h3>\n\n\n\n
    # \u6269\u5927\u5b57\u6bb5\u957f\u5ea6(\u4fee\u6539\u5b57\u6bb5\u7c7b\u578b)\npt-online-schema-change -u pt_osc -p 'iUdy87G_caq' \\\n  -S \/tmp\/mysql.sock \\\n  --alter \"MODIFY COLUMN email VARCHAR(100) NOT NULL\" \\\n  --execute D=maria,t=users_info\n\n# \u4fee\u6539\u5217\u540d\uff08\u9700\u52a0--no-check-alter\u8df3\u8fc7\u6821\u9a8c\uff09\npt-online-schema-change -u pt_osc -p 'iUdy87G_caq' \\\n  -S \/tmp\/mysql.sock \\\n  --alter \"CHANGE COLUMN name user_name VARCHAR(50)\" \\\n  --no-check-alter \\\n  --execute D=maria,t=users_info\n<\/code><\/pre>\n\n\n\n
    4. \u7d22\u5f15\u64cd\u4f5c<\/h3>\n\n\n\n
    # \u6dfb\u52a0\u666e\u901a\u7d22\u5f15\npt-online-schema-change -u pt_osc -p 'iUdy87G_caq' \\\n  -S \/tmp\/mysql.sock \\\n  --alter \"ADD INDEX idx_user_name (user_name)\" \\\n  --execute D=maria,t=users_info\n\n# \u5220\u9664\u7d22\u5f15\npt-online-schema-change -u pt_osc -p 'iUdy87G_caq' \\\n  -S \/tmp\/mysql.sock \\\n  --alter \"DROP INDEX idx_user_name\" \\\n  --execute D=maria,t=users_info\n<\/code><\/pre>\n\n\n\n
    5. \u9ad8\u5371\u64cd\u4f5c\uff1a\u6dfb\u52a0\u552f\u4e00\u7d22\u5f15<\/h3>\n\n\n\n
    \n
    \u26a0\ufe0f \u98ce\u9669\u63d0\u793a\uff1apt-osc \u9ed8\u8ba4\u7528INSERT IGNORE<\/code>\u62f7\u8d1d\u6570\u636e\uff0c\u91cd\u590d\u6570\u636e\u4f1a\u88ab\u9759\u9ed8\u4e22\u5f03\uff01<\/p>\n<\/blockquote>\n\n\n\n
    \u5b89\u5168\u6d41\u7a0b<\/strong>\uff1a<\/p>\n\n\n\n
      \n
    1. \u5148\u6821\u9a8c\u5b57\u6bb5\u552f\u4e00\u6027\uff1a<\/li>\n<\/ol>\n\n\n\n
      SELECT IF(COUNT(DISTINCT user_name) = COUNT(*),\n  '\u2705 \u5b57\u6bb5\u65e0\u91cd\u590d\u503c\uff0c\u53ef\u5b89\u5168\u6dfb\u52a0',\n  '\u274c \u5b58\u5728\u91cd\u590d\u6570\u636e\uff0c\u6dfb\u52a0\u4f1a\u4e22\u5931\u6570\u636e'\n) AS check_result FROM maria.users_info;\n<\/code><\/pre>\n\n\n\n
        \n
      1. \u786e\u8ba4\u65e0\u8bef\u540e\u6267\u884c\uff1a<\/li>\n<\/ol>\n\n\n\n
        pt-online-schema-change -u pt_osc -p 'iUdy87G_caq' \\\n  -S \/tmp\/mysql.sock \\\n  --alter \"ADD UNIQUE KEY uniq_user_name (user_name)\" \\\n  --execute D=maria,t=users_info\n<\/code><\/pre>\n\n\n\n
          \n
        1. \u82e5\u5fc5\u987b\u5f3a\u5236\u6dfb\u52a0\uff08\u9700\u4e1a\u52a1\u786e\u8ba4\uff09\uff1a<\/li>\n<\/ol>\n\n\n\n
          # \u82e5\u786e\u8ba4\u53ef\u4e22\u5f03\u91cd\u590d\u6570\u636e\uff0c\u9700\u6dfb\u52a0--no-check-unique-key-change<\/span>\u53c2\u6570\u5f3a\u5236\u6267\u884c\uff08\u8c28\u614e\u4f7f\u7528\uff01\uff09\npt-online-schema-change -u pt_osc -p 'iUdy87G_caq' \\\n  -S \/tmp\/mysql.sock \\\n  --alter \"ADD UNIQUE KEY uniq_user_name (user_name)\" \\\n  --no-check-unique-key-change \\\n  --execute D=maria,t=users_info\n<\/code><\/pre>\n\n\n\n
          \u56db\u3001\u907f\u5751\u6307\u5357\uff1a\u4f7f\u7528 pt-osc \u7684 5 \u4e2a\u5173\u952e\u6ce8\u610f\u4e8b\u9879<\/h2>\n\n\n\n
            \n
          1. \u5fc5\u987b\u6709\u4e3b\u952e \/ \u552f\u4e00\u7d22\u5f15<\/strong>\uff1apt-osc \u4f9d\u8d56\u552f\u4e00\u6807\u8bc6\u5206\u5757\u62f7\u8d1d\u6570\u636e\uff0c\u65e0\u4e3b\u952e\u4f1a\u76f4\u63a5\u62a5\u9519<\/li>\n\n\n\n
          2. \u9884\u7559\u8db3\u591f\u78c1\u76d8\u7a7a\u95f4<\/strong>\uff1a\u5f71\u5b50\u8868 + \u6570\u636e\u62f7\u8d1d\u9700\u5360\u7528\u539f\u8868 1.5 \u500d\u4ee5\u4e0a\u7a7a\u95f4\uff0c\u7a7a\u95f4\u4e0d\u8db3\u4f1a\u5bfc\u81f4\u5931\u8d25<\/li>\n\n\n\n
          3. \u539f\u8868\u4e0d\u80fd\u6709\u89e6\u53d1\u5668<\/strong>\uff1apt-osc \u7684\u89e6\u53d1\u5668\u4f1a\u4e0e\u73b0\u6709\u89e6\u53d1\u5668\u51b2\u7a81\uff0c\u9700\u63d0\u524d\u5220\u9664\u6216\u6539\u7528 gh-ost \u5de5\u5177<\/li>\n\n\n\n
          4. \u9ad8\u5e76\u53d1\u573a\u666f\u8c28\u614e\u4f7f\u7528<\/strong>\uff1a\u89e6\u53d1\u5668\u4f1a\u589e\u52a0\u4e3b\u5e93 CPU \u5f00\u9500\uff0c\u5efa\u8bae\u5728\u4e1a\u52a1\u4f4e\u5cf0\u671f\u6267\u884c\uff0c\u5e76\u901a\u8fc7--max-load<\/code>\u9650\u5236\u8d1f\u8f7d<\/li>\n\n\n\n
          5. \u4e3b\u4ece\u5ef6\u8fdf\u76d1\u63a7<\/strong>\uff1a\u6570\u636e\u540c\u6b65\u671f\u95f4\u53ef\u80fd\u4ea7\u751f\u5ef6\u8fdf\uff0c\u9700\u5b9e\u65f6\u76d1\u63a7\u4ece\u5e93\u72b6\u6001\uff0c\u5fc5\u8981\u65f6\u7528--delay<\/code>\u53c2\u6570\u63a7\u5236\u62f7\u8d1d\u901f\u5ea6<\/li>\n<\/ol>\n\n\n\n
            \u4e94\u3001\u5de5\u5177\u9009\u578b\u5bf9\u6bd4<\/h2>\n\n\n\n
            \u7279\u6027<\/th>pt-online-schema-change<\/th>MySQL 8.0 INSTANT DDL<\/th>gh-ost<\/th><\/tr><\/thead>
            \u9002\u7528\u7248\u672c<\/td>5.1+<\/td>8.0.12+<\/td>5.6+<\/td><\/tr>
            \u6838\u5fc3\u673a\u5236<\/td>\u89e6\u53d1\u5668 + \u5f71\u5b50\u8868<\/td>\u5143\u6570\u636e\u4fee\u6539<\/td>binlog \u89e3\u6790 + \u5f71\u5b50\u8868<\/td><\/tr>
            \u652f\u6301\u64cd\u4f5c\u7c7b\u578b<\/td>\u5168\u91cf DDL<\/td>\u4ec5\u589e\u5220\u5217\uff08\u90e8\u5206\u573a\u666f\uff09<\/td>\u5168\u91cf DDL<\/td><\/tr>
            \u9ad8\u5e76\u53d1\u5f71\u54cd<\/td>\u4e2d\u7b49\uff08\u89e6\u53d1\u5668\u5f00\u9500\uff09<\/td>\u6781\u4f4e<\/td>\u4f4e\uff08\u65e0\u89e6\u53d1\u5668\uff09<\/td><\/tr>
            \u539f\u8868\u89e6\u53d1\u5668\u517c\u5bb9<\/td>\u4e0d\u517c\u5bb9<\/td>\u517c\u5bb9<\/td>\u517c\u5bb9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
            \n
            \u4e2a\u4eba\u5efa\u8bae\uff1aMySQL 8.0 \u7528\u6237\u65b0\u589e\u5b57\u6bb5\u4f18\u5148\u7528 INSTANT DDL\uff1b\u590d\u6742\u6539\u8868\u6216\u4f4e\u7248\u672c\u7528 pt-osc\uff1b\u9ad8\u5e76\u53d1 + \u6709\u89e6\u53d1\u5668\u573a\u666f\u7528 gh-ost<\/p>\n<\/blockquote>\n\n\n\n
            \u603b\u7ed3<\/h2>\n\n\n\n
            pt-online-schema-change \u4f5c\u4e3a\u8001\u724c\u5728\u7ebf\u6539\u8868\u5de5\u5177\uff0c\u7a33\u5b9a\u6027\u548c\u517c\u5bb9\u6027\u7ecf\u8fc7\u4e86\u751f\u4ea7\u73af\u5883\u7684\u957f\u671f\u9a8c\u8bc1\u3002\u638c\u63e1\u5b83\u7684\u6838\u5fc3\u539f\u7406\u548c\u5b9e\u64cd\u6280\u5de7\uff0c\u80fd\u8ba9\u6211\u4eec\u5728\u5904\u7406\u5927\u8868\u7ed3\u6784\u53d8\u66f4\u65f6\u4ece\u5bb9\u4e0d\u8feb\u3002\u8bb0\u4f4f\uff1a\u4efb\u4f55\u6539\u8868\u64cd\u4f5c\u524d\u52a1\u5fc5\u5907\u4efd\u6570\u636e\uff0c\u5148\u5728\u6d4b\u8bd5\u73af\u5883\u9a8c\u8bc1\uff0c\u518d\u5728\u751f\u4ea7\u73af\u5883\u6267\u884c<\/strong>\uff01<\/p>\n\n\n\n
            \u5206\u4eab\u4e00\u4e2a\u5b9e\u6218\u5c0f\u6280\u5de7\uff1a\u6267\u884c\u524d\u5148\u53bb\u6389--execute<\/code>\u53c2\u6570\uff0c\u7528--dry-run<\/code>\u53c2\u6570\u505a\u9884\u68c0\u67e5\uff0c\u786e\u8ba4\u65e0\u62a5\u9519\u540e\u518d\u6b63\u5f0f\u6267\u884c\u3002\u53e6\u5916\uff0c\u64cd\u4f5c\u5343\u4e07\u7ea7\u5927\u8868\u65f6\uff0c\u53ef\u901a\u8fc7--chunk-size<\/code>\u53c2\u6570\u63a7\u5236\u6bcf\u6b21\u540c\u6b65\u7684\u6570\u636e\u91cf\uff0c\u907f\u514d\u5f71\u54cd\u6570\u636e\u5e93\u6027\u80fd\u3002<\/p>\n\n\n\n
            \u5982\u679c\u5927\u5bb6\u5728\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u9047\u5230\u7279\u6b8a\u573a\u666f\uff0c\u6216\u8005\u6709\u5176\u4ed6 MySQL \u8fd0\u7ef4\u96be\u9898\uff0c\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u4ea4\u6d41\uff5e \u540e\u7eed\u8fd8\u4f1a\u5206\u4eab\u66f4\u591a Percona \u5de5\u5177\u7684\u5b9e\u6218\u7ecf\u9a8c\uff0c\u8bb0\u5f97\u5173\u6ce8\u6211\u7684\u300c\u6570\u636e\u5e93\u6280\u672f\u4e13\u680f\u300d\u54e6\uff01<\/p>\n\n\n\n
            <\/p>\n","protected":false},"excerpt":{"rendered":"
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