Message-ID: <4C0F3E3E.6050805@2ndquadrant.com>
Date: Wed, 09 Jun 2010 03:09:50 -0400
From: Greg Smith <greg@2ndquadrant.com>
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To: Thomas Kellerer <spam_eater@gmx.net>
CC: pgsql-admin@postgresql.org
Subject: Re: Details about pg_stat_bgwriter
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Thomas Kellerer wrote:
> I don't think we have a caching issue though, it's just one (regular) 
> bulk import that does some heavy writes which we need to tune. Read 
> performance is absolutely fine, but everything around vacuum and 
> checkpointing seems to slow down the import massively.
> So would taking a snapshot before and after this import be the right 
> way to start the analysis?

Sure.  Might want to grab one at those two points, then at a point right 
before the next big import happens, so that you have what a relatively 
idle period looks like for comparison sake. 

-- 
Greg Smith  2ndQuadrant US  Baltimore, MD
PostgreSQL Training, Services and Support
greg@2ndQuadrant.com   www.2ndQuadrant.us