Re: Linux Memory Accounting

  • From: "Jared Still" <jkstill@xxxxxxxxx>
  • To: "Frits Hoogland" <frits.hoogland@xxxxxxxxx>
  • Date: Tue, 3 Oct 2006 14:57:31 -0700

Hi Frits,

Comments inline:

On 10/3/06, Frits Hoogland <frits.hoogland@xxxxxxxxx> wrote:

this means it's impossible to calculate database memory usage in a simple way by examining the processes at OS level.


Yes, I've discovered that.

so I'd go with kevin's recommandation to use some tool to look at global OS
level to see memory usage. besides the omitted shared memory, it's accurate.


I've cobbled together a script to scan the /proc/<PID>/maps files for
a process owner, and add up the memory, hopefully with a minimum
of double counting.

The results for running it on 2 servers are approximately what I
would expect to see. This includes shared memory.

http://jaredstill.com/downloads/proc_mem_used.tgz

Comments, suggestions and/or improvments are welcomed.

--
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist

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