生产环境,假如不小心有个Waiting for global read lock 锁出现(例如flink cdc全量抽取数据),很容易造成生产事故。 对于这种情况,我们首先需要在流程上把控: 1、不要对外开授权过大的账号 2、没有写入需求的业务,原则上只允许去连接从库 有个流程后,还需要有个巡检和自动化处理机制,作为兜底。 Waiting for global...
解释"waiting for global read lock"的含义 "waiting for global read lock"是一个在数据库管理系统(如MySQL)中可能出现的状态信息,特别是当执行某些全局性操作,如全局读锁(Global Read Lock, GRL)的获取时。这个状态表明某个操作或进程正在等待获取对整个数据库实例的读锁定,以确保在读取数据时不会发生并发修改。
ReentrantReadWriteLock.GetWaitingThreads(ICondition) Method Reference Feedback Definition Namespace: Java.Util.Concurrent.Locks Assembly: Mono.Android.dll Returns a collection containing those threads that may be waiting on the given condition associated with the write lock. C# 複製 [Android...
我在服务器上使用下面的方式备份数据库时,发现存在Waiting for global read lock,导致无法正常使用业务。看文档上说 single-transaction 是这么说的This option issues a BEGIN SQL statement before dumping data from the server mysql上关于single-transaction的解释cms...
CurrentReadCount IsReadLockHeld IsUpgradeableReadLockHeld IsWriteLockHeld RecursionPolicy RecursiveReadCount RecursiveUpgradeCount RecursiveWriteCount WaitingReadCount WaitingUpgradeCount WaitingWriteCount 方法 RegisteredWaitHandle Semaphore SemaphoreFullException ...
网页访问504报错--waiting for global read lock 问题现象: web网站登录时报错504,timeout. nginx正常,api报错连接数据库失败。 排查过程: 1.手动登录数据库连接正常,查询数据正常;(未测试数据写入) 2.使用命令:show processlist发现update和set等命令语句都是waiting for global read lock状态。
结论:因为选用--master-data参数在SQL文件的头部会写入binlog和position信 息,所以在执行备份前mysql需要执行flush tables,搭建过从库的同学都了解,我们在获取完整备份前都要执行FLUSH TABLES WITH READ LOCK;来获取这些主库当前信息,这里也是这样。 www.it165.net ...
One of my api servers (the one with id=14) is stuck with system user waiting for commit lock and all queries which insert data to my database are waiting for global read lock the other server is working just fine and I can execute insert queries on it, nothing special in the error ...
lock inf: Waiting for global read lock | 16449640 | zabbix | 10.200.:50083 | zabbix | Query | 2166 | Waiting for global read lock | update httptest set nextcheck=1572524839 where httptestid=15 | | 16449641 | zabbix | 10.200.:50084 | zabbix | Query | 1735 | Waiting for global read...
简介:在MySQL · 特性分析 · 到底是谁执行了FTWL中 文章中,分析了为何出现大量Waiting for global read lock的连接。但是实际操作起来很多gdb版本不支持pset操作,而且连接过多,导致不可能手动打印每一个THD的state,所以笔者写了一个gdb的脚本供大家使用: 首先,先保存下面脚本到/tmp/getlockconn MySQL8. ...