Re: Optimizing Bitmap Heap Scan.

From: niraj patel <npatel(at)gridsolv(dot)com>
To: Grzegorz Jaśkiewicz <gryzman(at)gmail(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Optimizing Bitmap Heap Scan.
Date: 2009-12-08 13:50:52
Message-ID: 187141.41592.qm@web1202.biz.mail.gq1.yahoo.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-performance

Hi gryzman,

I have run vacuum full analyze on the cmrules tables. The version of pstgres is 8.2.13. How should I change stats to 100 ?

Thanks

________________________________
From: Grzegorz Jaśkiewicz <gryzman(at)gmail(dot)com>
To: niraj patel <npatel(at)gridsolv(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Sent: Tue, 8 December, 2009 7:12:49 PM
Subject: Re: [PERFORM] Optimizing Bitmap Heap Scan.

it looks like it might choose wrong plan, cos it gets the stats wrong.
Try increasing number of stats to 100.
Btw, what version it is ?

In response to

Responses

Browse pgsql-performance by date

  From Date Subject
Next Message Matthew Wakeling 2009-12-08 14:03:38 Re: Optimizing Bitmap Heap Scan.
Previous Message Grzegorz Jaśkiewicz 2009-12-08 13:42:49 Re: Optimizing Bitmap Heap Scan.