【问题】 最近发现3.4版本mongo集群实例日志发现疯狂刷如下日志: I SHARDING [RangeDeleter] waiting for open cursors before removing
Waiting in Line (30) 时间限制 400 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN,...There is a yellow line in front of the windows which devides the waiting area into two parts....For example, suppose that a bank has 2 windows and each window may have 2 custmers waiting inside the...There are 5 customers waiting with transactions taking 1, 2, 6, 4 and 3 minutes, respectively.
作者:魏新平 在使用mysql的时候,我们有时会碰到Waiting for table metadata lock的锁等待。...--------------------------------+ | 1 | event_scheduler | localhost | NULL | Daemon | 365869 | Waiting...= 'sleep' | | 13044 | root | localhost | NULL | Query | 4 | Waiting for table metadata...------------+-----------------------------------------------------------------------+ 可以看到,如果一个表产生了Waiting...一般及时提交或者尽量优化sql,缩短sql的执行时间,就可以减少Waiting for table metadata lock的出现次数了。
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。...Waiting for global read lock 的案例: 会话1: [test]> flush table with read lock; Query OK,...+-----------+---------------+ | 135 | dts | 192.168.31.181:52902 | test | Query | 517 | Waiting
启动查看控制台 控制台 Waiting for changelog lock....
文章目录 新建状态(NEW) 运行状态(RUNNABLE) 就绪状态(READY) 运行状态(RUNNING) 阻塞状态(BLOCKED) 等待状态(WAITING) 超时等待状态(TIMED_WAITING...等待状态,表示线程进入等待状态,进入该状态表示当前线程需要等待其他线程做出一些特定动作(通知或中断) TIME_WAITING 超时等待状态,该状态不同于WAITING,它是可以在指定的时间自行返回的...TERMINATED 终止状态,表示当前线程已经执行完毕 具体状态切换如下图所示,下图源自《Java并发编程艺术》 由图4-1中可以看到,线程创建之后,调用start()方法开始运行。...超时等待状态(TIMED_WAITING) 区别于WAITING,它可以在指定的时间自行返回。...参考:《Java并发编程的艺术》
-+----------------------------------+ | 5 | event_scheduler | localhost | NULL | Daemon | 34025 | Waiting...| show processlist | | 23 | root | localhost | NULL | Query | 33 | Waiting...| select * from test.e01 | | 24 | root | localhost | NULL | Query | 7 | Waiting...------------------------+ 乍一看来,很是奇怪,这里没有出现我们经常遇到的 flush table/flush table with read lock 堵塞,直接出现了 Waiting...-------+---------+----------+----------+ session 3 mysql> select * from test.e01; # 被堵塞了 此时堵塞的情形就是Waiting
问题描述 远程登录服务器后,第二天回来跟服务器的连接总是断开,断开信息为: timed out waiting for input: auto-logout 解决方案 为了增强linux系统的安全性
GitHub Actions Error "Waiting for a runner to pick up this job" 什么是GitHub Actions GitHub Actions 是一个...waiting for a runner to pick up this job 但是这个配置已经成功运行了N多次,今天不知道为啥出现这个问题。
There is a yellow line in front of the windows which devides the waiting area into two parts....For example, suppose that a bank has 2 windows and each window may have 2 customers waiting inside the...There are 5 customers waiting with transactions taking 1, 2, 6, 4 and 3 minutes, respectively.
wordpress速度优化总是一个老生常谈的课题。最近有一个项目基于wordpress,网站页面接近10万+,访问造成的大量数据库查询,服务器时常负载跑满自闭。...
h309.jpg (3)最后上到服务器上查看下SQL的执行情况 ①查看show full processlist; doc_image_2_w1889_h676.jpg 大量的请求都是在“Waiting...for table metadata lock”,可以分成三类请求: Select请求 Rename请求 Sleep请求 ②分析Waiting for table metadata lock... 一般来说常见的“Waiting for table metadata lock”会出现在DDL操作或者是有未提交的事务上,从information_schema.processlist表中...可以通过在初始化连接池的时候,对每一个连接进行设置,即 doc_image_9_w771_h92.jpg 三、 延伸的一些思考 1、metadata lock (1)MDL简述 为了在并发环境下维护表元数据的数据一致性...if not exists tb2(a int); ... hangs ... ③查看show processlist Session 1:Sleep Session 2:Waiting
Another app is currently holding the yum lock; waiting for it to exit... 可能是系统自动升级正在运行,yum在锁定状态中。
在进行alter table操作时,有时会出现Waiting for table metadata lock的等待场景。...而且,一旦alter table TableA的操作停滞在Waiting for table metadata lock的状态,后续对TableA的任何操作(包括读)都无法进行,也会在Opening tables...的阶段进入Waiting for table metadata lock的队列。...造成alter table产生Waiting for table metadata lock的原因其实很简单,一般是以下几个简单的场景: 场景一: 通过show processlist可以看到TableA
waiting_lock_type | EXCLUSIVE waiting_lock_duration | TRANSACTION waiting_query...waiting_query_rows_affected | 0 waiting_query_rows_examined | 0 blocking_thread_id ... waiting_lock_type | EXCLUSIVE waiting_lock_duration | TRANSACTION waiting_query...waiting_query_rows_affected | 0 waiting_query_rows_examined | 0 blocking_thread_id ..., waiting_age, waiting_query, waiting_state, blocking_processlist_id, blocking_age
unchecked this item. and then restart your eclipse .
问题描述 对MySQL进行alter table等DDL操作时,有时会发现对某个表的任何操作都被阻塞,包括读,报错如下图所示 [业务报错] 然后show process list可以看到大量的Waiting
在远程连接mysql的时候,连接不上,出现如下报错: Lost connection to MySQL server at 'waiting for initial communication packet
[image.png] 查看 Console output: Waiting for next available executor on ‘Jenkins' [image.png] 打开系统管理-节点管理
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