From: Kelly Burkhart <kelly@tradebotsystems.com>
To: Ron <rjpeace@earthlink.net>
Cc: pgsql-performance@postgresql.org
Subject: Re: Need for speed 2
Date: Thu, 25 Aug 2005 14:00:22 -0500
Message-ID: <1124996422.6969.47.camel@krb06.tradebot.com> (raw)
In-Reply-To: <6.2.3.4.0.20050825094630.05e6b160@pop.earthlink.net>
References: <6.2.3.4.0.20050817140116.05d317b0@pop.earthlink.net>
<f3c0b408050817133325dfa491@mail.gmail.com>
<430D6EED.10603@relevanttraffic.se>
<6.2.3.4.0.20050825094630.05e6b160@pop.earthlink.net>
On Thu, 2005-08-25 at 11:16 -0400, Ron wrote:
> ># - Settings -
> >
> >fsync = false # turns forced synchronization on or off
> >#wal_sync_method = fsync # the default varies across platforms:
> > # fsync, fdatasync, open_sync, or
>
> I hope you have a battery backed write buffer!
Battery backed write buffer will do nothing here, because the OS is
taking it's sweet time flushing to the controller's battery backed write
buffer!
Isn't the reason for batter backed controller cache to make fsync()s
fast?
-K
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To: pgsql-performance@postgresql.org
Cc: kelly@tradebotsystems.com, rjpeace@earthlink.net
Subject: Re: Need for speed 2
In-Reply-To: <1124996422.6969.47.camel@krb06.tradebot.com>
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