yes. I suspect it has something to do with swapping. but swap is turned off on this server. here is the result of free -m. total used free shared buff/cache available Mem: 128174 97449 24400 4158 6325 25232 Swap: 0 0 0 We have other servers. The processes running on these servers are same. but on other servers, the size of buff/cache is larger than the size on the server which experienced the problem and the size of "free" is smaller than the size on the server which experienced the problem. 在 2021-03-10 14:30:00，"Thomas Stephen Lee" <lee.iitb at gmail.com> 写道： >On Sat, Mar 6, 2021 at 6:37 AM yf chu <cyflhn at 163.com> wrote: >> >> no, not vm >> >> >> >> >> | | >> yf chu >> | >> | >> 邮箱：cyflhn at 163.com >> | >> >> 签名由 网易邮箱大师 定制 >> >> On 03/05/2021 23:37, Matthew Miller wrote: >> On Fri, Mar 05, 2021 at 03:54:14PM +0800, yf chu wrote: >> > We have experienced a very weird problem. The load of the server machine is very high. We use "pidstat" and find that the disk read io is very high. >> >> Is this system a VM? >> >> -- >> Matthew Miller >> <mattdm at fedoraproject.org> >> Fedora Project Leader > >Hi, > >Is this due to swapping? > >what is the output of > >free -m > >--- >Lee >_______________________________________________ >CentOS mailing list >CentOS at centos.org >https://lists.centos.org/mailman/listinfo/centos