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From: Simon Riggs <simon@2ndquadrant.com>
To: Jignesh K. Shah <J.K.Shah@Sun.COM>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Josh Berkus <josh@agliodbs.com>
Cc: pgsql-performance@postgresql.org
Cc: Alvaro Herrera <alvherre@commandprompt.com>
Subject: Re: CLOG Patch
Date: Fri, 10 Aug 2007 21:03:19 +0100
Message-ID: <1186776199.4505.39.camel@ebony.site> (raw)
In-Reply-To: <46BCA661.6000404@sun.com>
References: <200707190828.59088.josh@agliodbs.com>
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	<15685.1184895926@sss.pgh.pa.us>
	<200707192138.39679.josh@agliodbs.com>
	<46A0FA31.2080208@sun.com>
	<12002.1184955831@sss.pgh.pa.us>
	<46A1055F.9010304@sun.com>
	<12445.1184958793@sss.pgh.pa.us>
	<46A11116.5030905@sun.com>
	<14909.1184962561@sss.pgh.pa.us>
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	<1185180668.4284.149.camel@ebony.site>
	<23848.1185199901@sss.pgh.pa.us>
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	<25095.1185202498@sss.pgh.pa.us>
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	<1185212261.4284.270.camel@ebony.site>
	<1545.1185214760@sss.pgh.pa.us>
	<46A7D5AD.9000706@sun.com>
	<13162.1185405865@sss.pgh.pa.us>
	<46A8AFDF.3050804@sun.com>
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	<46A8BD62.2080904@sun.com>
	<1185465076.4190.87.camel@ebony.site>
	<46B38B83.1000906@sun.com>
	<1186172987.4136.18.camel@ebony.site>
	<46BCA661.6000404@sun.com>

On Fri, 2007-08-10 at 13:54 -0400, Jignesh K. Shah wrote:
> I tried with CLOG  24 also and I got linear performance upto 1250 users 
> after which it started to tank. 32 got us to 1350 users before some 
> other bottleneck overtook it.

Jignesh,

Thanks for testing that.

It's not very clear to everybody why an extra 100 users is useful and it
would certainly help your case if you can explain.

-- 
  Simon Riggs
  EnterpriseDB  http://www.enterprisedb.com




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