Query 4-5 times slower after ANALYZE - Mailing list pgsql-general

From Philippe Lang
Subject Query 4-5 times slower after ANALYZE
Date
Msg-id E6A0649F1FBFA3408A37F505400E7AC215CDA9@email.attiksystem.ch
Whole thread Raw
Responses Re: Query 4-5 times slower after ANALYZE  (Bill Moran <wmoran@potentialtech.com>)
Re: Query 4-5 times slower after ANALYZE  (Sebastian Pawłowski <sebpaa@gmail.com>)
List pgsql-general
Hi,

I'm using Postgresql 8.3.6 under Freebsd 7.1.

After a fresh restore of a customer dump (running version 8.2.7 at the
moment), a rather big query executes in about 30 seconds. As soon as I
run ANALYZE, it is instantly 4-5 times slower. I could check that
multiples times.

Here is the EXPLAIN ANALYZE before the ANALYZE:
http://www.attiksystem.ch/postgresql/query_slower_after_analyze/before.t
xt

And here the the EXPLAIN ANALYZE after the ANALYZE:
http://www.attiksystem.ch/postgresql/query_slower_after_analyze/after.tx
t

Any idea what could be turned on/off in order not to have this slowdown
after the ANALYZE?

Best regards,

---------------
Philippe Lang
Attik Syste,

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