| From: | Adam Tauno Williams <adamtaunowilliams(at)gmail(dot)com> |
|---|---|
| To: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Linux mis-reporting memory |
| Date: | 2007-09-21 00:22:36 |
| Message-ID: | 1190334156.6835.1.camel@aleph.wmmi.net |
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| Thread: | |
| Lists: | pgsql-performance |
> Sorry, I know this is probably more a linux question, but I'm guessing
> that others have run into this...
> I'm finding this rather interesting report from top on a Debian box...
> Mem: 32945280k total, 32871832k used, 73448k free, 247432k buffers
> Swap: 1951888k total, 42308k used, 1909580k free, 30294300k cached
> This is a machine that's been up some time and the database is 400G, so
> I'm pretty confident that shared_buffers (set to 8G) should be
> completely full, and that's what that top process is indicating.
Nope, use "ipcs" to show allocated shared memory segments.
One of the better articles on LINUX & memory management -
http://virtualthreads.blogspot.com/2006/02/understanding-memory-usage-on-linux.html
--
Adam Tauno Williams, Network & Systems Administrator
Consultant - http://www.whitemiceconsulting.com
Developer - http://www.opengroupware.org
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