| From: | Stephan Szabo <sszabo(at)megazone(dot)bigpanda(dot)com> |
|---|---|
| To: | Rob Schall <rschall(at)callone(dot)net> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Identical Queries |
| Date: | 2007-03-01 19:39:09 |
| Message-ID: | 20070301112948.R45862@megazone.bigpanda.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
On Thu, 1 Mar 2007, Rob Schall wrote:
> Question for anyone...
>
> I tried posting to the bugs, and they said this is a better question for here.
> I have to queries. One runs in about 2 seconds. The other takes upwards
> of 2 minutes. I have a temp table that is created with 2 columns. This
> table is joined with the larger database of call detail records.
> However, these 2 queries are handled very differently.
How many rows are there in anitmp and how many rows in anitmp have
istf=true and how many have istf=false? If you don't currently analyze the
temp table after adding the rows, you might find that doing an analyze
helps, or at least makes the row estimates better.
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