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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Lor <Robert.Lor@Sun.COM>
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 14:10:26 -0400
Message-ID: <3706.1153678226@sss.pgh.pa.us> (raw)
In-Reply-To: <44C195F8.9010409@sun.com>
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>

Robert Lor <Robert.Lor@Sun.COM> writes:
> Here is the break down between exclusive & shared LWLocks. Do the 
> numbers look reasonable to you?

Yeah, those seem plausible, although the hold time for
CheckpointStartLock seems awfully high --- about 20 msec
per transaction.  Are you using a nonzero commit_delay?

			regards, tom lane



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