topic Re: Buf Cache High in Operating System - HP-UX

Buf Cache High

Wamaitha — Fri, 21 Mar 2008 18:21:19 GMT

hello,
attached it the output for memory using glance. the question i have is in ref. to the buf cache, where is that allocated and how do i get that memory back.

Thanks in advance

Re: Buf Cache High

Dennis Handly — Fri, 21 Mar 2008 18:29:17 GMT

(Nothing was attached.)

The buffer cache is allocated in memory. You get rid if it by using memory for more important things, all automatically.

You can of course configure the min/max buffer cache size with kctune(1m)/kmtune(1m):
dbc_max_pct and dbc_min_pct

Re: Buf Cache High

Wamaitha — Fri, 21 Mar 2008 18:33:39 GMT

sorry about that , here is the attachement

Re: Buf Cache High

Dennis Handly — Fri, 21 Mar 2008 18:49:11 GMT

I'm not sure there are any problems. You don't have any Page Outs. Your buffer cache will shrink if you need the memory for something else.
If you are using Oracle, you should reduce dbc_max_pct.

Re: Buf Cache High

Wamaitha — Fri, 21 Mar 2008 19:31:41 GMT

we are using Oracle -- changed the dbc_max_pct to 10