I use pidstat and find all processes on this server perform read operation. but I don't know where these read operation come from
| | yf chu | | 邮箱：cyflhn@163.com |
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On 03/05/2021 23:03, Joshua Kramer wrote: Install a program called iotop. iotop will show you, in real time, which processes are using the most i/o bandwidth.
On Fri, Mar 5, 2021 at 2:54 AM yf chu cyflhn@163.com 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. But the processes running on this server do not perform any disk read operation. We also noticed that when we execute "top" command, for most of processes, the values in "SHR" column are zero. Compared with other normal servers, we found that by executing "free -m", the result shows that the buff/cache value in this server is lower than the value of other normal servers. We also found that there were lots of major page faults by executing "ps -o majflt,minflt". Swap is not enabled on this server. What could be the reason for this issue?
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