From: Rob Schall <rschall@callone.net>
To: Stephan Szabo <sszabo@megazone.bigpanda.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Identical Queries
Date: Thu, 01 Mar 2007 14:55:01 -0600
Message-ID: <45E73DA5.40808@callone.net> (raw)
In-Reply-To: <20070301112948.R45862@megazone.bigpanda.com>
References: <45E6F49D.3010707@callone.net>
<20070301112948.R45862@megazone.bigpanda.com>
There are 4 entries (wanted to make the playing field level for this
test). There are 2 with true for istf and 2 with false.
Rob
Stephan Szabo wrote:
> 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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To: pgsql-performance@postgresql.org
Cc: rschall@callone.net, sszabo@megazone.bigpanda.com
Subject: Re: Identical Queries
In-Reply-To: <45E73DA5.40808@callone.net>
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