Please add test cases for this situation. You will find a how-to in the Contribution guide and examples in the t/pt-online-schema-change directory. The test cases has been added. But I can't modify my branch name. Do I need to create a new standard branch and resubmit the merge requ...
14 changes: 11 additions & 3 deletions 14 mysql/pt-online-schema-change/README.md Original file line numberDiff line numberDiff line change @@ -296,14 +296,22 @@ drop trigger trigger이름;  ### 1억건 / FK O ### 1억건 / FK X * ...
3. 即便欲进行表结构变更的表中存在主键或者唯一索引,如果在利用pt-online-schema-change进行online ddl过程中,有针对主键的更新操作,则会导致记录的新增。这点需引起注意。
pt-online-schema-change 使用基础6 mysql>select*from forpttest;+---+---+---+---+---+|id|name|comment|abc|newid|+---+---+---+---+---+|1|1|1|1|NULL||9|9|9|9|NULL||10|10|10|10|NULL||11|11|11|11|NULL||12|12|12|12|NULL||13|13|13|13|NULL||14|14|14|14|N...
Online Schema Change:Online Schema Change(OSC)工具是MySQL官方提供的一种无锁变更工具,它可以在不停止MySQL服务器的情况下对表结构进行修改。OSC利用了InnoDB存储引擎的特性,使用复制和重放日志的方式来实现无锁变更。 pt-online-schema-change:pt-online-schema-change是Percona Toolkit中的一个工具,它可以在不停止...
This is where pt-online-schema-change came to the rescue! We could use pt-osc to do the table placing without downtime, but there’s a catch: pt-osc only works when what you want to do is possible by using an ALTER TABLE statement, and in order to use the CREATE TABLE...DATA DI...
pt-osc是Percona运维工具包中提供的表结构变更工具,全称pt-online-schema-change。执行流程图如下: 查看来源 从中可知其采用触发器来应用DDL执行期间对表所做的DML操作,每种DML操作均对应一个触发器,如下所示: CREATE TRIGGER `pt_osc_sbtest_sbtest2_del` AFTER DELETE ON `sbtest`.`sbtest2` FOR EACH ROW ...
1)当行记录小于150万行,研发可以直接在网页里执行Alter table操作。 2)当行记录大于150万行并且小于3000行,平台将调用pt-online-schema-change开源工具在线执行Alter表结构变更。 注:期间不要关闭浏览器!执行进度会自动刷新。 3)当行记录大于3000行时,提示:Alter更改表结构会引起表锁,影响业务。由于该表过大,平台不支...
pt-online-schema-change 3.1.0 Please refer the attached file. I am getting the same issue. There is an error in MySQL that makes the server to die when trying to rename a table with FKs. SeeMySQL Bugs: Access denied Since pt-online-schema change needs to rename the old <-> new tabl...
http://dev.mysql.com/doc/refman/5.7/en/innodb-create-index-overview.html 可以使用 Alter 语句支持 DDL 特性 ，比如可以用 LOCK = NONE 无锁变更。percona是一个开源产品 , 是管理Mysql的工具。PT-OSC(Percona Toolkit Online Schema Change)https://www.percona.com/doc/percona-toolkit/3....