Re: Disk read io very high, but no process perform io read

["yf chu" <cyflhn@xxxxxxx>]

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@xxxxxxxxx> 写道：
>On Sat, Mar 6, 2021 at 6:37 AM yf chu <cyflhn@xxxxxxx> wrote:
>>
>> no, not vm
>>
>>
>>
>>
>> | |
>> yf chu
>> |
>> |
>> 邮箱：cyflhn@xxxxxxx
>> |
>>
>> 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@xxxxxxxxxxxxxxxxx>
>> Fedora Project Leader
>
>Hi,
>
>Is this due to swapping?
>
>what is the output of
>
>free -m
>
>---
>Lee
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