Re: AIX slow buffer reads - Mailing list pgsql-performance

From Brad Nicholson
Subject Re: AIX slow buffer reads
Date
Msg-id 4CC8A9A3.7060901@ca.afilias.info
Whole thread Raw
In response to Re: AIX slow buffer reads  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: AIX slow buffer reads
List pgsql-performance
On 10/27/2010 4:10 PM, Tom Lane wrote:
> Greg Smith<greg@2ndquadrant.com>  writes:
>> André Volpato wrote:
>>> I disabled effective_io_concurrency at AIX but it made no changes on bitmap index times.
>> Brad's point is that it probably doesn't do anything at all on AIX, and
>> is already disabled accordingly.
> AFAICT from googling, AIX does have posix_fadvise, though maybe it
> doesn't do anything useful ...
>
>             regards, tom lane

If there is an easy way to check if it does do anything useful?  If so,
I can check it out.

--
Brad Nicholson  416-673-4106
Database Administrator, Afilias Canada Corp.


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