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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Alan Stange <stange@rentec.com>
Cc: Gregory Stark <stark@enterprisedb.com>
Cc: Jignesh K. Shah <J.K.Shah@Sun.COM>
Cc: Greg Smith <gsmith@gregsmith.com>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4
Date: Fri, 13 Mar 2009 13:23:24 -0400
Message-ID: <12431.1236965004@sss.pgh.pa.us> (raw)
In-Reply-To: <49BA79A4.9030208@rentec.com>
References: <C5DDBB25.3333%scott@richrelevance.com>
	<49B922C0.6050700@sun.com>
	<alpine.GSO.2.01.0903121613270.1925@westnet.com>
	<49BA5537.8060002@sun.com>
	<87prgl4jbh.fsf@oxford.xeocode.com>
	<49BA79A4.9030208@rentec.com>

Alan Stange <stange@rentec.com> writes:
> Gregory Stark wrote:
>> AFAIK Opensolaris doesn't implement posix_fadvise() so there's no benefit.

> It's implemented.   I'm guessing it's not what you want to see though:
> http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libc/port/gen/posix_fadvise.c

Ugh.  So apparently, we actually need to special-case Solaris to not
believe that posix_fadvise works, or we'll waste cycles uselessly
calling a do-nothing function.  Thanks, Sun.

			regards, tom lane



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