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检查mysql慢查询

tag-icon • tag-icon mysql monitoring nagios icinga
检查mysql慢查询

是否可以像这样监视 mysql：

  • 如果某些查询运行超过 300 秒 - 将会发出警告
  • 如果某些查询运行超过 500 秒 - 这将是至关重要的

我试过：

/usr/lib/nagios/plugins/check_mysql_health --hostname localhost --username icinga --password XXX --mode slow-queries --warning 300

但这仅显示每秒的 slow_queries 速率。如何才能按照我描述的方式监控 mysql？

感谢您的帮助。

Br，

答案1

检查 percona 的 mysql 脚本。有一些非常好的实用程序： http://www.percona.com/software/percona-toolkit http://www.percona.com/software/percona-monitoring-plugins

答案2

使用 Nagios 监控 MySQL 服务可用性是可以的，但肯定不是慢速查询。

我使用一个简单的 bash 脚本，该脚本在 crontab 中每 x 秒运行一次并扫描进程列表以捕获运行时间超过 180 秒的查询。希望它也适合您的情况：

    #!/bin/bash


[email protected] 

count=0

# capture all running queries
echo "<TABLE BORDER=1><TR><TH>Queries running more than 180 seconds</TH></TR></TABLE>" > /tmp/long_running_queries.htm
mysql -uroot -ppassword -s -e "SELECT  now(), ID, USER, HOST, DB, COMMAND, TIME, STATE, INFO FROM  information_schema.PROCESSLIST WHERE HOST not in ('%','localhost') AND COMMAND not in ('Sleep','Binlog Dump') AND TIME > 120;" > /tmp/all_running_queries.txt
echo "<TABLE BORDER=1>" >> /tmp/long_running_queries.htm

# store the output
while IFS= read -r ROW
do
    count=$(($count + 1))
    echo "<TR>" >> /tmp/long_running_queries.htm
    echo "$ROW"  >> /tmp/long_running_queries.htm
    echo "</TR>" >> /tmp/long_running_queries.htm
done < /tmp/all_running_queries.txt 

# if there are more than 2 long running queries then send the output from while loop above into mail
# else pruge the output
if (("$count" > "2"));
then
    echo "</TABLE>" >> /tmp/long_running_queries.htm
    Subject="$count SQL queries running for more than 180 Seconds"
    Body="Some text"
    echo $Body | mutt -a /tmp/long_running_queries.htm -s "$Subject" $Notify
else
    echo "" > /tmp/long_running_queries.htm
fi

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