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Re: Log full with gigabyes of CurTransactionContex

From: Iñigo Martinez Lasala <imartinez(at)vectorsf(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: Log full with gigabyes of CurTransactionContex
Date: 2009-06-15 15:12:48
Message-ID: 1245078768.16064.45.camel@coyote (view raw or flat)
Thread:
Lists: pgsql-admin
Thank you very much, Tom.

We have increased shared buffers to 2.5GB (linux kernels allows us reach
this level) and lowered work_mem to 500MB.
Let's see tonight. :-)


-----Original Message-----
From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Iñigo Martinez Lasala <imartinez(at)vectorsf(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: [ADMIN] Log full with gigabyes of CurTransactionContex
Date: Mon, 15 Jun 2009 10:02:26 -0400


=?ISO-8859-1?Q?I=F1igo?= Martinez Lasala <imartinez(at)vectorsf(dot)com> writes:
> We have a problem with an insert query in one of our clients. This query
> is launched in a night batch process. We have observed that if change
> set is big (more than 50.000 updates) our database log starts growing
> with thousands and thousands of lines until the server is out of space
> and database freezes.

You're running out of memory.

> work_mem = 2000MB
> maintenance_work_mem = 1024M

These two settings are probably the cause.  With shared_buffers at 2GB,
you do not have anywhere near 1GB to play around with in a 32-bit
environment.  Try something like 200M and 500M.

> Increasing temp buffers could help?

I can hardly think of anything more counterproductive.  You don't
have enough address space.

			regards, tom lane

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Subject: Re: Log full with gigabyes of CurTransactionContex
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