Re: [GENERAL][HACKERS]data fragmentation

Hello,

An quicker option would be to use rsync (on a stopped database of
course). You can rsync to a new directory (off the filesystem) and then
reformat the data filesystem and move it back.

J

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.
>
>Somasekhar
>
>
>-----Original Message-----
>From: Jaime Casanova [mailto:el_vigia_ec(at)hotmail(dot)com]
>Sent: Friday, December 12, 2003 3:07 AM
>To: pgsql-general(at)postgresql(dot)org; pgsql-hackers(at)postgresql(dot)org; pgsql-admin(at)postgresql(dot)org
>Subject: [GENERAL][ADMIN][HACKERS]data fragmentation
>
>Hi,
>
>i have a theorical question. i was thought that data fragmentation can cause
>a
>loss of performance when retrieving data from a database. Some DBMS solved
>this
>with dbspaces, but postgresql doesn't support this concept.
>so, pgsql databases tend to suffer from data fragmentation?
>if yes, what is the solution you recommend?
>
>also i was thought that even when DBMS support dbspaces DELETEing records
>may
>cause data fragmentation anyway.
>so, can i think of DELETE statement as a double-edged sword?
>it is indifferent in pgsql - it doesn't support dbspaces anyway?
>
>thanks in advance,
>Jaime Casanova (el_vigia)
>
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