Re: performance drop on 8.2.4, reverting to 8.1.4 - Mailing list pgsql-performance

From Tom Lane
Subject Re: performance drop on 8.2.4, reverting to 8.1.4
Date
Msg-id 11710.1181266274@sss.pgh.pa.us
Whole thread Raw
In response to Re: performance drop on 8.2.4, reverting to 8.1.4  (Alvaro Herrera <alvherre@commandprompt.com>)
Responses Re: performance drop on 8.2.4, reverting to 8.1.4  ("Steven Flatt" <steven.flatt@gmail.com>)
List pgsql-performance
Alvaro Herrera <alvherre@commandprompt.com> writes:
> Tom Lane escribi�:
>> I was hoping that the auto plan invalidation code in CVS HEAD would get
>> it out of this problem, but it seems not to for the problem-as-given.
>> The trouble is that it won't change plans until autovacuum analyzes the
>> tables, and that won't happen until the transaction commits and sends
>> off its I-inserted-lotsa-rows report to the stats collector.

> I think there is something we can do about this -- drop the default
> value for analyze threshold.

Maybe worth doing, but it doesn't help for Steve's example.

            regards, tom lane

pgsql-performance by date:

Previous
From: Alvaro Herrera
Date:
Subject: Re: performance drop on 8.2.4, reverting to 8.1.4
Next
From: Tom Lane
Date:
Subject: Re: Getting Slow