From: Vitaly Belman <vitalib@012.net.il>
To: Postgresql Performance <pgsql-performance@postgresql.org>
Subject: PostgreSQL caching
Date: Fri, 21 May 2004 17:42:09 +0300
Message-ID: <40782517171.20040521174209@012.net.il> (raw)
Hello,
I have the following problem:
When I run some query after I just run the Postmaster, it takse
several seconds to execute (sometimes more than 10), if I rerun it
again afterwards, it takes mere milliseconds.
So, I guess it has to do with PostgreSQL caching.. But how exactly
does it work? What does it cache? And how can I control it?
I would like to load selected information in the memory before a user
runs the query. Can I do it somehow? As PostgreSQL is used in my case
as webserver, it isn't really helping if the user has to wait 10
seconds every time he goes to a new page (even if refreshing the page
would be really quick, sine Postgre already loaded the data to
memory).
P.S If the query or its EXPLAIN are critical for a better
understanding, let me know.
Regards,
Vitaly Belman
ICQ: 1912453
AIM: VitalyB1984
MSN: tmdagent@hotmail.com
Yahoo!: VitalyBe
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To: pgsql-performance@postgresql.org
Cc: vitalib@012.net.il
Subject: Re: PostgreSQL caching
In-Reply-To: <40782517171.20040521174209@012.net.il>
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