Date: Wed, 2 Sep 2009 08:33:48 -0400 From: Bill Moran <wmoran@potentialtech.com> To: Per olof Ljungmark <peo@intersonic.se> Cc: freebsd-questions@freebsd.org Subject: Re: memory usage displsy Message-ID: <20090902083348.40c21529.wmoran@potentialtech.com> In-Reply-To: <4A9DB590.6080605@intersonic.se> References: <4A9D8057.8020307@intersonic.se> <20090901162931.d85ec256.wmoran@potentialtech.com> <20090901204147.GC2855@dan.emsphone.com> <4A9DB590.6080605@intersonic.se>
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In response to Per olof Ljungmark <peo@intersonic.se>: > Dan Nelson wrote: > > In the last episode (Sep 01), Bill Moran said: > >> In response to Per olof Ljungmark <peo@intersonic.se>: > >>> What is a good way to find out how memory is used? Have a 6.4 box where > >>> memory is used by something but I fail to see what is using it - tried > >>> different switches to ps(1), tried the stat tools but a big chunk of > >>> memory does not show at all. > >>> > >>> A proper tool for analyzing memory usage "live", this is a production > >>> box? > >> I've always been able to get what I need from top. You can do -o res to > >> sort by resident memory usage, which helps. > > > > ps will sort by memory usage when given the -m flag. Also check ipcs -a to > > see if there are any sysv shared memory segments hanging arnound. If you > > don't see anything using the memory, where are you seeing that "something" > > is using it? > > > > ...and here is top output after I stopped Postfix, slapd and Cyrus-IMAP. > Still over 3G Active. <snip> You did not sort by res and there are only 40 processes showing, which means your output is truncated and may have truncated the problematic process. Please use "top -o res" to get the output sorted by memory usage, or don't truncate the output (former preferred). Also, please provide the output of "ipcs -a" -- Bill Moran http://www.potentialtech.com http://people.collaborativefusion.com/~wmoran/
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