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Re: Zen and art if WAL and dump file mainteance

From: "Spiegelberg, Greg" <gspiegelberg(at)isodxsolutions(dot)com>
To:
Cc: "posgres support" <pgsql-admin(at)postgresql(dot)org>
Subject: Re: Zen and art if WAL and dump file mainteance
Date: 2008-01-28 21:37:00
Message-ID: 82E74D266CB9B44390D3CCE44A781ED902641A2D@POSTOFFICE.cranel.local (view raw or flat)
Thread:
Lists: pgsql-admin
I've seen this quite a bit lately especially when Vmware is involved.
Over committing the host server is becoming more common and Vmware has
this "balloon" driver which can bring out the Linux oom-killer process.
Check your messages file for "oom-killer".  If it's there, Tom's right
and you need to check into tweaking the kernel a little.

sysctl -w vm.overcommit_memory=2

OR

echo "vm.overcommit_memory=2" >> /etc/sysctl.conf
sysctl -p

Greg


-----Original Message-----
From: pgsql-admin-owner(at)postgresql(dot)org
[mailto:pgsql-admin-owner(at)postgresql(dot)org] On Behalf Of Tom Lane
Sent: Monday, January 28, 2008 4:27 PM
To: dx k9
Cc: posgres support
Subject: Re: [ADMIN] Zen and art if WAL and dump file mainteance 

dx k9 <bitsandbytes88(at)hotmail(dot)com> writes:
> We are trying to figure out why maintenance on A (zipping up &
removing files) would have an affect on production processing (killed
it) on pgdata - B.

Sounds like an OOM kill problem --- do you have memory overcommit
disabled on that machine?

			regards, tom lane

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