topic Re: a swap puzzle in Operating System - HP-UX

a swap puzzle

leelangco_1 — Tue, 25 Sep 2007 20:10:34 GMT

hi,i have a puzzle about the swap space used in system(11.11).
when i used swapinfo -atm ,i find that the dev swap used percent is 0%.
but i used sam ->performance monitor->system propertys->mem ,i found the swap used is 1.5Gb.

now my question is that how the 1.5gb come from? thank you.

Re: a swap puzzle

A. Clay Stephenson — Tue, 25 Sep 2007 20:55:11 GMT

It sounds as though you have pseudoswap (swapmem_on=1) enabled and that 1.5GiB of memory has been reserved for process space. This is entirely normal --- and pseudoswap isn't swap at all; it's just a way to allow a portion physical memory to be counted as process reservation space just as though it were "real" swap space.

Re: a swap puzzle

whiteknight — Tue, 25 Sep 2007 21:05:49 GMT

Leelangco,

Check this article about

What is swap and why does a system need it?
http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en&docId=emr_na-c01003338

Hope this help

WK