Re: LDC - Load Distributed Checkpoints with PG8.3b2 on Solaris

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Jignesh K(dot) Shah" <J(dot)K(dot)Shah(at)Sun(dot)COM>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: LDC - Load Distributed Checkpoints with PG8.3b2 on Solaris
Date: 2007-11-13 16:37:29
Message-ID: 17597.1194971849@sss.pgh.pa.us
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"Jignesh K. Shah" <J(dot)K(dot)Shah(at)Sun(dot)COM> writes:
> I am running tests with PG8.3b2 on Solaris 10 8/07 and I still see IO
> flood when checkpoint happens.

I am thinking that you are probably trying to test that by issuing
manual CHECKPOINT commands. A manual checkpoint is still done at full
speed, as are shutdown checkpoints. You need to study the behavior of
automatic (background) checkpoints, instead.

regards, tom lane

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