Re: PostgreSQL 9.2.4 using large amount of memory

On Mon, Jan 27, 2014 at 12:12:13PM -0500, Tom Lane wrote:
> Bhushan Pathak <bhushan(dot)pathak02(at)gmail(dot)com> writes:
> > In 9.1.3, this usage was upto 25MB with the same load on the same server.
> > With 9.2.4 it has jumped upto ~580 MB. We are monitoring the RES column
> > from top output to get the memory usage.
>
> On most versions of "top", examining RES alone gives a completely
> misleading impression of what's happening. RES minus SHR is a better
> estimate of what the process has really consumed. I don't know why the
> behavior changed from 9.1 to 9.2, but this measurement alone is not
> evidence that you have an actual problem.

These blog entries cover memory consuption analysis:

http://momjian.us/main/blogs/pgblog/2012.html#January_30_2012
http://momjian.us/main/blogs/pgblog/2012.html#February_1_2012

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Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

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