How to verify server swap activity

[Mauro Gatti]

Hi all, I'd like to know swap activity of my server when some programs run. Is there any way to check this information?

Thank You

[Stefan Farrelly · Accepted solution]

2 ways;

1. vmstat 1 10

and look for pi/po (page-ins per second, page-outs per second). If you server is not paging it should only show 0 or 1.

2. swapinfo -mt

and look at the device usage column. If your server is out of memory and paging then the %USED under deivce will be >0.

[T G Manikandan]

Also in addition to Stefan

#sar -w 5 5

-w option of sar can measure the swap activity.


Thanks