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我们已经将我们的服务器从Debian Wheezy更新到Jessie,从php5.6更新到php7.0,但现在我们每小时都有一个磁盘I / O和负载平均峰值.确切的时间取决于系统的启动时间.
在这台服务器上,我们有：
> nginx / 1.10.1
> PHP 7.0.8-1~docdeb 8.1
> Percona mysql服务器5.6.30-76.3-log
> dovecot 2.2.devel
>后缀2.11.3-1
> java 1.7.0_101
我们试图回到php5.6,禁用cron,禁用postfix和dovecot,停止我们的Java应用程序,但没有任何帮助.
峰值如下所示：
iotop如下所示：
我怎么才能确切地知道导致这些峰值的原因并消除它们？
最佳答案
也许你每小时有一些MySQL scheduled events？
MySQL Events are tasks that run according to a schedule. Therefore,we
sometimes refer to them as scheduled events. When you create an event,
you are creating a named database object containing one or more SQL
statements to be executed at one or more regular intervals,beginning
and ending at a specific date and time. Conceptually,this is similar
to the idea of the Unix crontab (also known as a “cron job”) or the
Windows Task Scheduler.
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