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Re: 9.3 feature proposal: vacuumdb -j #

From: Jan Lentfer <Jan(dot)Lentfer(at)web(dot)de>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Re: 9.3 feature proposal: vacuumdb -j #
Date: 2012-01-13 22:03:16
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
Am 13.01.2012 22:50, schrieb Josh Berkus:
> It occurs to me that I would find it quite personally useful if the
> vacuumdb utility was multiprocess capable.
> For example, just today I needed to manually analyze a database with
> over 500 tables, on a server with 24 cores.   And I needed to know when
> the analyze was done, because it was part of a downtime.  I had to
> resort to a python script.
> I'm picturing doing this in the simplest way possible: get the list of
> tables and indexes, divide them by the number of processes, and give
> each child process its own list.
> Any reason not to hack on this for 9.3?

I don't see any reason not to do it, but plenty to do it.
Right now I have systems hosting many databases, I need to vacuum full 
from time to time. I have wrapped vacuumdb with a shell script to 
actually use all the capacity that is available. A vacuumdb -faz just 
isn't that usefull on large machines anymore.


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Subject: Re: Concurrent CREATE TABLE/DROP SCHEMA leaves inconsistent leftovers
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Subject: 9.3 feature proposal: vacuumdb -j #

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