Re: Intel 320 SSD info - Mailing list pgsql-performance

From David Boreham
Subject Re: Intel 320 SSD info
Date
Msg-id 4E5537F6.3070105@boreham.org
Whole thread Raw
In response to Re: Intel 320 SSD info  (Greg Smith <greg@2ndQuadrant.com>)
Responses Re: Intel 320 SSD info  (Greg Smith <greg@2ndQuadrant.com>)
List pgsql-performance
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.



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