| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | Mark Kirkwood <markir(at)paradise(dot)net(dot)nz> |
| Cc: | henk de wit <henk53602(at)hotmail(dot)com>, jesper(at)krogh(dot)cc, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Using IOZone to simulate DB access patterns |
| Date: | 2009-04-10 17:10:03 |
| Message-ID: | 49DF7D6B.9020107@agliodbs.com |
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| Lists: | pgsql-performance |
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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