Re: Query performance - normal on 9.0.4, slow from 9.0.5 onwards - Mailing list pgsql-performance

From Tom Lane
Subject Re: Query performance - normal on 9.0.4, slow from 9.0.5 onwards
Date
Msg-id 19327.1325266819@sss.pgh.pa.us
Whole thread Raw
In response to Query performance - normal on 9.0.4, slow from 9.0.5 onwards  (Miguel Silva <miguel.silva@tactis.pt>)
Responses Re: Query performance - normal on 9.0.4, slow from 9.0.5 onwards
List pgsql-performance
Miguel Silva <miguel.silva@tactis.pt> writes:
> But with postgresql version 9.0.5 (in version 9.0.4 all was fine), we
> noticed the program was taking longer to start. In fact, in some clients
> that had older hardware, it could take around 20 minutes when it usually
> takes only a few seconds. To make a long story short, the problem was
> traced and narrowed down to a single auto generated query. Here it is:

> "SELECT [ snip ]"

> ... Here are the explain analyzes.

> enable_material ON: http://explain.depesz.com/s/wen
> enable_material OFF: http://explain.depesz.com/s/Zaa

It doesn't really accomplish anything to post anonymized explain output
when you've already shown us the actual query, does it?  Especially when
said query involves only the system catalogs and by no stretch of the
imagination could be thought to contain anything proprietary?

            regards, tom lane

pgsql-performance by date:

Previous
From: Miguel Silva
Date:
Subject: Query performance - normal on 9.0.4, slow from 9.0.5 onwards
Next
From: Miguel Silva
Date:
Subject: Re: Query performance - normal on 9.0.4, slow from 9.0.5 onwards