From: Josh Berkus <josh@agliodbs.com>
To: Mark Kirkwood <markir@paradise.net.nz>
Cc: henk de wit <henk53602@hotmail.com>
Cc: jesper@krogh.cc
Cc: pgsql-performance@postgresql.org
Subject: Re: Using IOZone to simulate DB access patterns
Date: Fri, 10 Apr 2009 10:10:03 -0700
Message-ID: <49DF7D6B.9020107@agliodbs.com> (raw)
In-Reply-To: <49DEE6B2.7030602@paradise.net.nz>
References: <COL104-W563A53910118E7079DBE5F5860@phx.gbl>
<49D73B50.1010007@krogh.cc>
<COL104-W79AC894F57255090CE4EB1F5860@phx.gbl>
<49DEDC1B.7080303@agliodbs.com>
<49DEE6B2.7030602@paradise.net.nz>
On 4/9/09 11:26 PM, Mark Kirkwood wrote:
> Josh Berkus wrote:
>> All,
>>
>> Wow, am I really the only person here who's used IOZone?
>>
>
> No - I used to use it exclusively, but everyone else tended to demand I
> redo stuff with bonnie before taking any finding seriously... so I've
> kinda 'submitted to the Borg' as it were....
Bonnie++ has its own issues with concurrency; it's using some kind of
ad-hoc threading implementation, which results in not getting real
parallelism. I just did a test with -c 8 on Bonnie++ 1.95, and the
program only ever used 3 cores.
--
Josh Berkus
PostgreSQL Experts Inc.
www.pgexperts.com
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To: pgsql-performance@postgresql.org
Cc: josh@agliodbs.com, markir@paradise.net.nz, henk53602@hotmail.com, jesper@krogh.cc
Subject: Re: Using IOZone to simulate DB access patterns
In-Reply-To: <49DF7D6B.9020107@agliodbs.com>
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