topic Re: swapinfo and buffer-cache in Operating System - HP-UX

swapinfo and buffer-cache

Jdamian — Thu, 08 Feb 2001 17:40:19 GMT

A L-class system is used to backup in some DLTs using OmniBack.

The problem is that swapinfo reports me a lot of used memory in the "memory" line. But that value increases day by day; i.e., after rebooting the percentage is 15%, the next day is 31%, and so on... That value can reach 92% or 97%.

My account engineer says it is because of that buffer-cache is very used (OmniBack opens a lot of files).

But my question is...
Is the amount of memory used by buffer-cache included in the "memory" line of swapinfo output ?

Is not Buffer-cache reduced automatically when memory pages are requested for user processes ?

If this is true, the memory used by buffer-cache wouldn't appear in "memory" line of swapinfo output.

Thanx a lot in advance

Re: swapinfo and buffer-cache

Jdamian — Thu, 08 Feb 2001 17:42:45 GMT

I forgot to say that the swapinfo reports those high values in any time, not only when a backup is active and it doesn't decrease.

Re: swapinfo and buffer-cache

Jitendra_1 — Thu, 08 Feb 2001 18:35:08 GMT

Take a look at this thread , that might answer a few of your questions.

http://forums.itrc.hp.com/cm/QuestionAnswer/1,1150,0xbc8a0559ff7cd4118fef0090279cd0f9,00.html