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From: Robert Lor <Robert.Lor@Sun.COM>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Tatsuo Ishii <ishii@sraoss.co.jp>
Cc: pgsql-hackers@postgresql.org
Cc: pgsql-performance@postgresql.org
Subject: Re: Sun Donated a Sun Fire T2000 to the PostgreSQL
Date: Sun, 23 Jul 2006 20:34:25 -0700
Message-ID: <44C43FC1.4050002@sun.com> (raw)
In-Reply-To: <29920.1153704579@sss.pgh.pa.us>
References: <20060617.101521.95879771.t-ishii@sraoss.co.jp>
	<10226.1150511655@sss.pgh.pa.us>
	<20060617.111838.39487910.t-ishii@sraoss.co.jp>
	<20060713.180234.45872055.t-ishii@sraoss.co.jp>
	<8669.1153422118@sss.pgh.pa.us>
	<44C088C8.9050303@sun.com>
	<21889.1153489365@sss.pgh.pa.us>
	<44C195F8.9010409@sun.com>
	<3706.1153678226@sss.pgh.pa.us>
	<44C419BC.1050503@sun.com>
	<29920.1153704579@sss.pgh.pa.us>

Tom Lane wrote:

>Hmmm ... AFAICS this must mean that flushing the WAL data to disk
>at transaction commit time takes (most of) 20 msec on your hardware.
>Which still seems high --- on most modern disks that'd be at least two
>disk revolutions, maybe more.  What's the disk hardware you're testing
>on, particularly its RPM spec?
>  
>
I actually ran the test on my laptop. It has an Ultra ATA/100 drive 
(5400 rpm). The test was just a quickie to show some data from the 
probes. I'll collect and share data from the T2000 server later.

Regards,
-Robert

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