Re: Table partitioning for maximum speed?

From: Vivek Khera <khera(at)kcilink(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: Re: Table partitioning for maximum speed?
Date: 2003-10-10 20:15:43
Message-ID: x765iwq26o.fsf@yertle.int.kciLink.com
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>>>>> "JB" == Jeff Boes <jboes(at)nexcerpt(dot)com> writes:

JB> Will a query against a table of 0.5 million rows beat a query against
JB> a table of 7 million rows by a margin that makes it worth the hassle
JB> of supporting 15 "extra" tables?

I think you'll be better off with a single table, as you won't have
contention for the index pages in the cache.

One thing to do is to reindex reasonably often (for PG < 7.4) to avoid
index bloat, which will make them not fit in cache. Just check the
size of your index in the pg_class table, and when it gets big,
reindex (assuming you do lots of updates/inserts to the table).

Your table splitting solution sounds like something I'd do if I were
forced to use mysql ;-)

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Vivek Khera, Ph.D. Khera Communications, Inc.
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AIM: vivekkhera Y!: vivek_khera http://www.khera.org/~vivek/

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