Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Alan Stange <stange(at)rentec(dot)com>
Cc: Gregory Stark <stark(at)enterprisedb(dot)com>, "Jignesh K(dot) Shah" <J(dot)K(dot)Shah(at)Sun(dot)COM>, Greg Smith <gsmith(at)gregsmith(dot)com>, "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org>
Subject: Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4
Date: 2009-03-13 17:23:24
Message-ID: 12431.1236965004@sss.pgh.pa.us
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Alan Stange <stange(at)rentec(dot)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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