| From: | Rob Schall <rschall(at)callone(dot)net> |
|---|---|
| To: | Stephan Szabo <sszabo(at)megazone(dot)bigpanda(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Identical Queries |
| Date: | 2007-03-01 20:55:01 |
| Message-ID: | 45E73DA5.40808@callone.net |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
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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