Re: explain ? - Mailing list pgsql-general

From Patrick Welche
Subject Re: explain ?
Date
Msg-id 20030420001830.A24853@quartz.newn.cam.ac.uk
Whole thread Raw
In response to Re: explain ?  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-general
On Fri, Apr 18, 2003 at 10:20:33AM -0400, Tom Lane wrote:
> Patrick Welche <prlw1@newn.cam.ac.uk> writes:
> > I created an index on firsttimei, vacuum full analysed, and explain showed me
> > *exactly* the same thing(!) The difference being that the query is now
> > lightning fast :-)
>
> Perhaps the vacuum got rid of a whole bunch of dead rows?

I had done a vacuum full earlier.. and by dog slow versus lightning
fast, I mean 1 unit of data inserted in just over an hour versus
8.6 units of data inserted in 2 mins 29 seconds(!) Well, I'm
certainly not complaining!

Cheers,

Patrick


pgsql-general by date:

Previous
From: nolan@celery.tssi.com
Date:
Subject: Re: stddev returns 0 when there is one row
Next
From: Joe Conway
Date:
Subject: Re: stddev returns 0 when there is one row