From: | Dave Cramer <pg(at)fastcrypt(dot)com> |
---|---|
To: | Josh Berkus <josh(at)agliodbs(dot)com> |
Cc: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: Why the difference in plans ? |
Date: | 2008-03-06 18:56:19 |
Message-ID: | D9F2B8C8-C64A-490E-BB94-0322A6619FAF@fastcrypt.com |
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Thread: | |
Lists: | pgsql-performance |
On 6-Mar-08, at 12:26 PM, Josh Berkus wrote:
> Dave,
>
>> Below I have two almost identical queries. Strangely enough the one
>> that uses the index is slower ???
>
> My first guess would be that records are highly correlated by DOB
> and not at
> all by name. However, it would help if you supplied both the index
> definitions and what changed between the two queries to cause the
> index to be
> used.
The two queries were run 2 seconds apart, there were no changes
between. I'll get the index definitions.
Dave
>
>
> --
> Josh Berkus
> PostgreSQL @ Sun
> San Francisco
>
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