最近看到"八怪"写的<MySQL:产生大量小relay log的故障一例>,因之前也遇到类似的情况,一直没搞懂原理及复现,看完此文章后,本着实践是检验真理的唯一标准的原则,决定自己也手动模拟一番,加深印象. 其中的模拟步骤与原文中不一致,感兴趣的小伙伴也可以自己动手模拟. 1.  案例模拟 原理啥的原文已介绍,此处不再赘述,只是直接进行案例模拟. 1.1  修改参数 从库上查看 mysql> select Heartbeat from mysql.slave_mast

用查找命令找出大于1G的文件 find / -size +1G -print 为什么jenkins.log会产生40+G的文件? 以上在Windows上的时候,运行了几个月,也没有发生这种现象? 而在CentOS系统上,我已经遇到第二次了,jenkins.log为什么10来天就几十个G?? 直接将log清空为“”,磁盘瞬间满血复活 同样是我安装的另一台CentOS上的jenkins.log就不会爆满 长期来看,如何解决Jenkins日志过大的问题? https://blog.51cto.com/

前言:MySQL进行主主复制或主从复制的时候会在配置文件制定的目录下面产生相应的relay log,本文档总结这些相关参数的定义及解释. 1.什么是relay log The relay log, like the binary log, consists of a set of numbered files containing events that describe database changes, and an index file that contains the names of

机器重启以后,主从出现了问题,具体报错信息: Slave failed to initialize relay log info structure from the repository 解决方案: mysql> start slave; ERROR (HY000): Slave failed to initialize relay log info structure from the repository mysql> reset slave; Query OK, rows affect

ERROR 1872 (HY000): Slave failed to initialize relay log info structure from the repository 在一台主机上增加一个slave,启动的时候报 [ERROR] Slave SQL: Slave failed to initialize relay log info structure from the repository, Error_code: 1872 原因:检查my.cnf,原来没指定relay_log

连接 amoeba-mysql出现Could not create a validated object, cause: ValidateObject failed mysql> start slave;ERROR 1872 (HY000): Slave failed to initialize relay log info structure from the repository 原因:检查my.cnf,原来没指定relay_log,mysql默认产生的relay_log名被该server上

数据库版本Server version:    5.6.24-log Source distribution 问题描述 数据采集平台业务数据库由于批量灌数据导致主从延迟上万秒. 复制线程长期处于Queueing master event to the relay log状态. 监控数据显示1.Seconds_Behind_Master 维持在6w秒左右,且有上升趋势.2.主库有大量的binlog积压无法同步到从库,但主从库的网卡流量都很低远未达到瓶颈.3.从库的qps与tps很低,维持在几百左右

mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is Server version: 5.7.-log MySQL Community Server (GPL) Copyright (c) , , Oracle and/o

备库报错: Last_SQL_Errno: 1594 Last_SQL_Error: Relay log read failure: Could not parse relay log event entry. The possible reasons are: the master's binary log is corrupted (you can check this by running 'mysqlbinlog' on the binary log), the slave's rela

17.2.2.1 The Slave Relay Log Slave中继日志 中继日志, 像binary log,有一组文件组成包含events 描述数据库的修改,和一个index文件包含所有使用过的relay log文件的名字 术语"relay log file"通常表示一个但都数字文件包含数据库events. Relay log 文件有相同的格式和binary log 文件可以使用mysqlbinlog读取 默认情况下,relay log 文件名格式为host_name-relay

salve复制线程停止,尝试start slave 时报ERROR 1872错误mysql> system perror 1872 MySQL error code 1872 (ER_SLAVE_RLI_INIT_REPOSITORY): Slave failed to initialize relay log info structure from the repository解决过程1.看样子是找不到中继日志的仓库,但是查看变量relay log的位置是设置了的mysql> show va

root@localhost > show slave status\G*************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.38.153.53 Master_User: mysqlsync Master_Port: 3306 Connect_Retry: 60 Master_Log_File:

今天查看mysql err日志.发现mysql重新启动时总会有例如以下日志出现: [Warning] Neither --relay-log nor --relay-log-index were used; so replication may break when this MySQL server acts as a slave and has his hostname changed!! Please use '--relay-log=liytest-relay-bin' to avoid

今天在使用冷备份文件重做从库时遇到一个报错,值得研究一下. 版本:MySQL5.6.27 一.报错现象 dba:(none)> start slave; ERROR (HY000): Slave failed to initialize relay log info structure from the repository 这个时候查看error.log: 2017-07-17 16:19:02 9022 [ERROR] Failed to open the relay log './tjtx

--master log 与relay log的关系 -------------------------------2014/06/09 Just to clarify, there are three sets of file/position coordinates in SHOW SLAVE STATUS: 1) The position, ON THE MASTER, from which the I/O thread is reading: Master_Log_File/Read_M

复制的介绍: 根据日志定义的模式不一样,可以分为:Statement(SBR)模式,Row(RBR)格式或者是MIXED格式,记录最小的单位是一个Event,binlog日志前4个字节是一个magic number,接下来19个字节记录Format desc evnet:FDE.MySQL5.6版本增加了GTID复制. 下面对三种binlog格式的优缺点: Statement(基于语句级的复制): 优点: 1)Binlog文件较小 2)日志是包含用户执行的原始SQL,方便统计和审计 3)出现最早

原因:检查my.cnf,原来没指定relay_log,mysql默认产生的relay_log名被该server上的另一个mysql slave占用了. 解决方法:1.在my.cnf中添加 relay_log = /usr/local/mysql/log/relay.log 2. reset slave mysql> reset slave; mysql> change master to -> master_host='192.168.0.11', -> master_user='

今天在使用冷备份文件重做从库时遇到一个报错,值得研究一下. 版本:MySQL5.6.27 一.报错现象 dba:(none)> start slave; ERROR (HY000): Slave failed to initialize relay log info structure from the repository 这个时候查看error.log: 2017-07-17 16:19:02 9022 [ERROR] Failed to open the relay log './tjtx

重启了一下从库,忘记先stop slave ,直接mysqladmin shutdown关闭实例,结果起不来了 mysql> start slave;ERROR 1872 (HY000): Slave failed to initialize relay log info structure from the repository 这个错误就是relay log有问题,但我看自己的配置中有配置relay_log参数,但为什么从库启动会在此处出问题呢 重新开启同步,先记下当前从库同步的位置 mys

  Preface       I've stuck twice in my previous experiments in backing up dropped tables.I am still not sure that why I got failure yesterday.Therefore,I decide to do that again with the same steps on another environment.Let's see the details.   Proc