Starting from Percona Toolkit 3.6.0, you can resume pt-online-schema-change if it was interrupted. This blog describes the prerequisites and usage of the new –resume option. To restart the job, you need to know where it failed. This is why the first option you must use is –history. ...
In this blog post we’ll discuss pt-online-schema-change, and how to correctly use it. Always use pt-osc? Altering large tables can be still a problematic DBA task, even now after we’ve improved Online DDL features in MySQL 5.6 and 5.7. Some ALTER types are still not online, or som...
pt-online-schema-change命令用于在不中断数据库服务的情况下,对数据库的表结构进行修改。通过该命令,可以实现对大表进行DDL操作而不影响正常的读写操作。该命令的使用需要谨慎,需要对表结构修改的影响有清晰的认识。 五、pt-table-checksum pt-table-checksum命令用于检查数据库的数据一致性。通过比较源表和备份表的...
pt-online-schema-change --alter 'drop column c1' h=localhost,u=root,P=3306,D=test,t=user --ask-pass --no-drop-old-table --execute 1. 添加索引 pt-online-schema-change --alter 'add index idx_ename(ename)' h=localhost,u=root,P=3306,D=test,t=test --ask-pass --no-drop-old-ta...
pt-online-schema-change--user=root --password=123 --host=10.0.0.11 --alter "add column age int default 0" D=test,t=t1 --print --execute 2.3 pt-table-checksum 创建数据库Createdatabase ptCHARACTERSETutf8; 创建用户checksum并授权GRANTALLON*.*TO'checksum'@'10.0.0.%'IDENTIFIEDBY'checksum';...
pt-online-schema-change 功能: 不锁表的情况下,修改表结构. 实现原理: 创建一个和你要执行alter操作的表一样的空表结构,执行表结构修改,然后从原表中copy原始数据到表结构修改后的表,当数据copy完成以后就会将原表移走,用新表代替原表,默认动作是将原表drop掉。在copy数据的过程中,任何在原表的更新操作都会...
#pt-online-schema-change --ask-pass --check-interval=1 --no-check-replication-filters --no-check-alter --no-version-check --chunk-size 3 --recursion-method=none --max-load='Threads_running=200' --critical-load='Threads_running=500' --recurse=0 --no-drop-old-table --alter="drop ...
使用pt-online-schema-change 将 MySQL 表改为分区表 mysqlschema备份测试数据 MySQL 版本: 8.0.16 percona-toolkit 版本:3.0.6 用户1148526 2023/11/15 3690 CentOS7 安装 PerconaTookit 步骤 云数据库 SQL Server数据库sql 背景 最近正在拓展 MySQL 数据库知识 发现很多提及 "PerconaTookit" 管理工具的建议 会方...
| performance_schema | | test | +---+ 6rowsinset(0.00 sec) 要想删除的话,一定要先把pt-table-checksum检查前添加的权限收回! mysql> show grantsfor'root'@'192.168.1.101'; +---
SSRS Nested IIF using different fields to change font color SSRS not working with a comma separated list submitted to a multiple values parameter. SSRS null date, inconsistent behavior ssrs number format to percentage issue SSRS ODBC (PostgreSQL) Parameter name SSRS One Row per page? SSRS Onl...