From: Andrew Morton <akpm@osdl.org>
To: P@draigBrady.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: How do you accurately determine a process' RAM usage?
Date: Wed, 6 Jul 2005 18:16:23 -0700 [thread overview]
Message-ID: <20050706181623.3729d208.akpm@osdl.org> (raw)
In-Reply-To: <42CC2923.2030709@draigBrady.com>
P@draigBrady.com wrote:
>
> I wrote a tool to report how much RAM a
> particular program (apache for e.g.) was using:
> http://www.pixelbeat.org/scripts/ps_mem.py
>
> I was then pointed at the following:
> http://wiki.apache.org/spamassassin/TopSharedMemoryBug
> which describes how copy-on-write pages are
> not counted as shared since 2.6.
>
> So how can one determine how much RAM a process is using?
> Seems like a fundamental requirement to me.
> Could we add a "SharedTotal" column to /proc/$$/statm for e.g. ?
Calculating this stuff accurately is very expensive. You'll get a better
answer using proc-pid-smaps.patch from -mm, but even that won't tell you
things about sharing levels of the pages.
next prev parent reply other threads:[~2005-07-07 1:21 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-06 18:55 P
2005-07-07 1:16 ` Andrew Morton [this message]
2005-07-07 8:26 ` P
2005-07-07 8:40 ` Andrew Morton
2005-07-07 10:42 ` Hugh Dickins
2005-07-12 9:44 ` P
2005-07-19 20:09 ` Mauricio Lin
2005-07-20 14:34 ` P
2005-07-20 15:32 ` Mauricio Lin
2005-07-20 15:48 ` P
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