Re: plpgsql function seems to be leaking memory - Mailing list pgsql-admin

From Guillaume Lelarge
Subject Re: plpgsql function seems to be leaking memory
Date
Msg-id 486114BF.7040901@lelarge.info
Whole thread Raw
In response to Re: plpgsql function seems to be leaking memory  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: plpgsql function seems to be leaking memory
List pgsql-admin
Tom Lane a écrit :
> Marc Cousin <mcousin@sigma.fr> writes:
>> I'm having a problem with plpgsql functions leaking memory.
>
> Your example shows absolutely no memory leak here, in either 8.3.3
> or CVS HEAD.
>
>> I see the postgresql process growing from 8MB to about 400 MB during this
>> run...
>
> What do you have shared_buffers set to?  I think you might be getting
> fooled by top's treatment of shared memory (ie, it starts to count
> shared pages after the process touches them for the first time).
>

That's what I thought at first when I saw Marc's email. I tried his
example many times, with different values for shared_buffers. RSS column
climbs until it reaches more or less the shared_buffers configuration.
But, if I launch another psql, this process will have a much lower value
on the RSS column. Shouldn't it get the RSS at the same value, even when
the process starts ?

I'm a bit puzzled by this column, anyone has a URL where I can find more
info?

Regards.


--
Guillaume.
  http://www.postgresqlfr.org
  http://dalibo.com

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