From: | Craig Ringer <ringerc(at)ringerc(dot)id(dot)au> |
---|---|
To: | Ioannis Anagnostopoulos <ioannis(at)anatec(dot)com> |
Cc: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: A very long running query.... |
Date: | 2012-07-21 08:02:21 |
Message-ID: | 500A620D.4030505@ringerc.id.au |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-novice pgsql-performance |
On 07/21/2012 06:19 AM, Ioannis Anagnostopoulos wrote:
> On this Ubuntu installation the default_statistics_target = 1000 and
> not 100. Do you think that this might be an issue?
Nope. You should generally avoid setting default_statistics_target too
high anyway; leave it where it is and use ALTER TABLE ... ALTER COLUMN
... SET STATISTICS to raise the targets on columns where you're seeing
bad statistics estimates.
http://www.postgresql.org/docs/9.1/static/sql-altertable.html
Also make sure autovaccum is running frequently so it keeps the stats up
to date.
--
Craig Ringer
From | Date | Subject | |
---|---|---|---|
Next Message | Marc Mamin | 2012-07-21 09:16:16 | Re: A very long running query.... |
Previous Message | Ioannis Anagnostopoulos | 2012-07-20 23:56:34 | Re: A very long running query.... |
From | Date | Subject | |
---|---|---|---|
Next Message | Craig Ringer | 2012-07-21 08:30:44 | Re: query overhead |
Previous Message | Ioannis Anagnostopoulos | 2012-07-20 23:56:34 | Re: A very long running query.... |