Re: Extremely irregular query performance - Mailing list pgsql-performance

From Jean-Philippe Cote
Subject Re: Extremely irregular query performance
Date
Msg-id 20060112201353.5C39138409A@crt0.crt.umontreal.ca
Whole thread Raw
In response to Extremely irregular query performance  (Jean-Philippe Côté<jean-philippe.cote@crt.umontreal.ca>)
Responses Re: Extremely irregular query performance
Re: Extremely irregular query performance
List pgsql-performance

Can I actully know whether a given plan is excuted with GEQO on ?
In other words, if I launch 'explain <query>', I'll get a given plan, but if I re-launch
the <query> (withtout the 'explain' keyword), could I get a different
plan given that GEQO induces some randomness ?

>Is it the plan that is different in the fastest case with GEQO or is it
>the time needed to plan that is causing the GEQO to beat the exhaustive
>search?



pgsql-performance by date:

Previous
From: Ottó Havasvölgyi
Date:
Subject: Re: Throwing unnecessary joins away
Next
From: Jaime Casanova
Date:
Subject: Re: Please Help: PostgreSQL performance Optimization