Re: slow queries after ANALYZE - Mailing list pgsql-performance

From hubert depesz lubaczewski
Subject Re: slow queries after ANALYZE
Date
Msg-id 9e4684ce0511120114m32254efen2faa6563146db202@mail.gmail.com
Whole thread Raw
In response to slow queries after ANALYZE  (DW <dwinner-lists@att.net>)
List pgsql-performance
On 11/11/05, DW <dwinner-lists@att.net> wrote:
I'm perplexed. I'm trying to find out why some queries are taking a long
time, and have found that after running analyze,  one particular query
becomes slow.

i have had exactly the same problem very recently.
what helped? increasing statistics on come column.
which ones?
make:
explain analyze <your select>;
and check in which situations you gget the biggest change of "estiamted rows" and "actual rows".
then check what this particular part of your statement is touching, and increase appropriate statistics.

depesz

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