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help / color / mirror / Atom feedFrom: Tom Lane <[email protected]>
To: George Pavlov <[email protected]>
Cc: Joshua D. Drake <[email protected]>
Cc: [email protected]
Subject: Re: index vs. seq scan choice?
Date: Thu, 07 Jun 2007 18:33:48 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <8C5B026B51B6854CBE88121DBF097A86DEA6C5@ehost010-33.exch010.intermedia.net>
References: <8C5B026B51B6854CBE88121DBF097A86C3A30D@ehost010-33.exch010.intermedia.net>
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"George Pavlov" <[email protected]> writes:
>> From: Joshua D. Drake [mailto:[email protected]]
>> In those rare cases wouldn't it make more sense to just set
>> enable_seqscan to off; run query; set enable_seqscan to on;
> 1. these cases are not that rare (to me);
It strikes me that you probably need to adjust the planner cost
parameters to reflect reality on your system. Usually dropping
random_page_cost is the way to bias the thing more in favor of
index scans.
regards, tom lane
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