From: Greg Smith <greg@2ndquadrant.com>
To: Andres Freund <andres@anarazel.de>
Cc: Scott Carey <scott@richrelevance.com>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: Kenneth Cox <kenstir@gmail.com>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: Advice configuring ServeRAID 8k for performance
Date: Mon, 16 Aug 2010 16:54:19 -0400
Message-ID: <4C69A57B.80605@2ndquadrant.com> (raw)
In-Reply-To: <20100816201838.GB3911@anarazel.de>
References: <201008131817.o7DIH1b03550@momjian.us>
<4C6591D9.1080206@2ndquadrant.com>
<5687A8AD-CA70-4272-A32C-6AE5F491CEA4@richrelevance.com>
<4C69796D.9000408@2ndquadrant.com>
<20100816200227.GA3911@anarazel.de>
<4C699BE2.50606@2ndquadrant.com>
<20100816201838.GB3911@anarazel.de>
Andres Freund wrote:
> A new checkpointing logic + a new syncing logic
> (prepare_fsync() earlier and then fsync() later) would be a nice
> thing. Do you plan to work on that?
>
The background writer already caches fsync calls into a queue, so the
prepare step you're thinking needs to be there is already. The problem
is that the actual fsync calls happen in a tight loop. That we're busy
fixing.
--
Greg Smith 2ndQuadrant US Baltimore, MD
PostgreSQL Training, Services and Support
greg@2ndQuadrant.com www.2ndQuadrant.us
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Cc: greg@2ndquadrant.com, andres@anarazel.de, scott@richrelevance.com, bruce@momjian.us, kenstir@gmail.com
Subject: Re: Advice configuring ServeRAID 8k for performance
In-Reply-To: <4C69A57B.80605@2ndquadrant.com>
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