Message-ID: <4E5537F6.3070105@boreham.org>
Date: Wed, 24 Aug 2011 11:42:14 -0600
From: David Boreham <david_list@boreham.org>
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To: pgsql-performance@postgresql.org
Subject: Re: Intel 320 SSD info
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On 8/24/2011 11:41 AM, Greg Smith wrote:
>
>
> I've measured the performance of this drive from a couple of 
> directions now, and it always comes out the same.  For PostgreSQL, 
> reading or writing 8K blocks, I'm seeing completely random workloads 
> hit a worst-case of 20MB/s; that's just over 2500 IOPS.  It's quite 
> possible that number can go lower under pressure of things like 
> internal drive garbage collection however, which I believe is going 
> into the 600 IOPS figure.  I haven't tried to force that yet--drive is 
> too useful to me to try and burn it out doing tests like that at the 
> moment.

I hope someone from Intel is reading -- it would be well worth their 
while to just send you a few drives,
since you are set up to perform the right test, and can provide 
impartial results.