问题描述
腾讯云主机,CPU1核,内存1G。经常遇到凌晨内存占用突然增加,同时CPU使用率100%的问题。此时已不能使用ssh登录,只能从腾讯云控制台重启主机。
问题解决
参考以下两篇文章
腾讯云主机每天早上内存暴涨引发CPU满载问题
在Ubuntu 16.04中关闭daily upgrade & clean
得出结论:CPU100%是由自动更新引起的
发现系统日志中有如下两行
Jan 3 06:39:19 s1 systemd[1]: Starting Daily apt upgrade and clean activities...
Jan 3 06:39:39 s1 systemd[1]: Started Daily apt upgrade and clean activities.
输入以下命令关闭自动更新
apt-get remove unattended-upgrades
systemctl kill --kill-who=all apt-daily.service
systemctl stop apt-daily.timer
systemctl disable apt-daily.timer
systemctl stop apt-daily.service
systemctl disable apt-daily.service
systemctl mask apt-daily.service
systemctl daemon-reload
输入以下命令查看关闭状态
systemctl status apt-daily.timer
如果结果中包含Active: inactive (dead)
则说明关闭成功
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