Re: Using IOZone to simulate DB access patterns

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