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Re: [GENERAL][HACKERS]data fragmentation

From: Alvaro Herrera <alvherre(at)dcc(dot)uchile(dot)cl>
To: Somasekhar Bangalore <sbangalore(at)zensutra(dot)com>
Cc: Jaime Casanova <el_vigia_ec(at)hotmail(dot)com>,pgsql-general(at)postgresql(dot)org, pgsql-hackers(at)postgresql(dot)org,pgsql-admin(at)postgresql(dot)org, K Harikumar <kharikumar(at)zensutra(dot)com>,Anoop G <ganoop(at)zensutra(dot)com>, Sanjay Rathod <srathod(at)zensutra(dot)com>
Subject: Re: [GENERAL][HACKERS]data fragmentation
Date: 2003-12-16 22:03:14
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Lists: pgsql-adminpgsql-generalpgsql-hackers
On Fri, Dec 12, 2003 at 09:59:23AM +0530, Somasekhar Bangalore wrote:
> Hi,
> I too had the same problem;  There was one query which used to take a
> very long time. What I did was, I took a backup of the whole database.
> Reinstalled postgres on a different mount point and restored the data
> back into the new database. Now my queries are running faster. Try it.
> All the very best.

You could instead apply CLUSTER to the affected tables.  (I'm assuming you
already apply VACUUM periodically and REINDEX as appropiate)

Alvaro Herrera (<alvherre[a]>)
"Everybody understands Mickey Mouse. Few understand Hermann Hesse.
Hardly anybody understands Einstein. And nobody understands Emperor Norton."

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