From: | "Dickson S(dot) Guedes" <listas(at)guedesoft(dot)net> |
---|---|
To: | Greg Stark <gsstark(at)mit(dot)edu> |
Cc: | Mitsuru IWASAKI <iwasaki(at)jp(dot)freebsd(dot)org>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: patch for new feature: Buffer Cache Hibernation |
Date: | 2011-05-04 16:07:44 |
Message-ID: | BANLkTimg7NcSzp0j-E=42A0O=GyhCh_BfQ@mail.gmail.com |
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Lists: | pgsql-hackers |
2011/5/4 Greg Stark <gsstark(at)mit(dot)edu>:
> On Wed, May 4, 2011 at 3:10 PM, Mitsuru IWASAKI <iwasaki(at)jp(dot)freebsd(dot)org> wrote:
>> Postgres usually starts with ZERO buffer cache. By saving the buffer
>> cache data structure into hibernation files just before shutdown, and
>> loading them at startup, postgres can start operations with the saved
>> buffer cache as the same condition as just before the last shutdown.
>
> Offhand this seems pretty handy for benchmarks where it would help get
> reproducible results.
It could have an option to force it or not at start of postgres. This
could helps on benchmarks scenarios.
--
Dickson S. Guedes
mail/xmpp: guedes(at)guedesoft(dot)net - skype: guediz
http://guedesoft.net - http://www.postgresql.org.br
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