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Re: mailing list archiver chewing patches

From: Matteo Beccati <php(at)beccati(dot)com>
To: Dimitri Fontaine <dfontaine(at)hi-media(dot)com>
Cc: David Fetter <david(at)fetter(dot)org>, Aidan Van Dyk <aidan(at)highrise(dot)ca>, Magnus Hagander <magnus(at)hagander(dot)net>, Dave Page <dpage(at)pgadmin(dot)org>, Abhijit Menon-Sen <ams(at)toroid(dot)org>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Tim Bunce <Tim(dot)Bunce(at)pobox(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: mailing list archiver chewing patches
Date: 2010-01-18 14:48:12
Message-ID: 4B5474AC.4090800@beccati.com (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-www
Il 16/01/2010 14:21, Matteo Beccati ha scritto:
> Il 16/01/2010 11:48, Dimitri Fontaine ha scritto:
>> Matteo Beccati<php(at)beccati(dot)com> writes:
>>> Anyway, I've made further changes and I would say that at this point
>>> the PoC
>>> is feature complete. There surely are still some rough edges and a few
>>> things to clean up, but I'd like to get your feedback once again:
>
> [...]
>
>>> Also, I'd need some help with the CTE query that was picking a wrong
>>> plan
>>> and led me to forcibly disable merge joins inside the application when
>>> executing it. Plans are attached.
>>
>> Sorry, not from me, still a CTE noob.
>
> Actually the live db doesn't suffer from that problem anymore, but I've
> able to reproduce the issue with a few days old backup running on a test
> 8.5alpha3 instance that still has a stock postgresql.conf.

Following advice from Andrew "RodiumToad" Gierth, I raised cpu costs 
back to the defaults (I did lower them following some tuning guide) and 
that seems to have fixed the problem.

My question now is... what next? :)


Cheers
-- 
Matteo Beccati

Development & Consulting - http://www.beccati.com/

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