From: | Joshua Tolley <eggyknap(at)gmail(dot)com> |
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To: | Data Growth Pty Ltd <datagrowth(at)gmail(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Partitioning into thousands of tables? |
Date: | 2010-08-06 14:08:29 |
Message-ID: | 4c5c1767.0a64730a.467a.6789@mx.google.com |
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Lists: | pgsql-general |
On Fri, Aug 06, 2010 at 03:10:30PM +1000, Data Growth Pty Ltd wrote:
> Is there any significant performance problem associated with partitioning
> a table into 2500 sub-tables? I realise a table scan would be horrendous,
> but what if all accesses specified the partitioning criteria "sid". Such
> a scheme would be the simplest to maintain (I think) with the best
> localisation of writes.
I seem to remember some discussion on pgsql-hackers recently about the number
of partitions and its effect on performance, especially planning time.
Unfortunately I can't find it right now, but in general the conclusion was
it's bad to have lots of partitions, where "lots" is probably 100 or more.
--
Joshua Tolley / eggyknap
End Point Corporation
http://www.endpoint.com
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