From: | Jim Vanns <james(dot)vanns(at)framestore(dot)com> |
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To: | Craig Ringer <ringerc(at)ringerc(dot)id(dot)au> |
Cc: | Jim Vanns <james(dot)vanns(at)framestore(dot)com>, Martin French <Martin(dot)French(at)romaxtech(dot)com>, pgsql-performance(at)postgresql(dot)org, pgsql-performance-owner(at)postgresql(dot)org |
Subject: | Re: Odd blocking (or massively latent) issue - even with EXPLAIN |
Date: | 2012-07-24 08:37:12 |
Message-ID: | 1343119032.12579.140.camel@sys367.ldn.framestore.com |
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Lists: | pgsql-performance |
On Tue, 2012-07-24 at 08:30 +0800, Craig Ringer wrote:
> On 07/23/2012 10:46 PM, Jim Vanns wrote:
> > Nothing obvious - and we log a fair amount. No tmp table creations,
> > no locks held.
> >
> > To add to this EXPLAIN reports it took only 0.23ms to run (for example)
> > whereas the wall clock time is more like 20-30 minutes (or up to n hours
> > as I said where everything appears to click back into place at the same
> > time).
> How many concurrent connections do you have?
Between 4 and 64 at peak! max_connections is only set to 100.
Jim
> --
> Craig Ringer
--
Jim Vanns
Systems Programmer
Framestore
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