Re: Performance query about large tables, lots of concurrent access - Mailing list pgsql-performance

From Scott Marlowe
Subject Re: Performance query about large tables, lots of concurrent access
Date
Msg-id 467B0588.5080500@g2switchworks.com
Whole thread Raw
In response to Re: Performance query about large tables, lots of concurrent access  (Andrew Sullivan <ajs@crankycanuck.ca>)
List pgsql-performance
Andrew Sullivan wrote:
> On Thu, Jun 21, 2007 at 12:29:49PM -0400, Karl Wright wrote:
>
>> I checked the disk picture - this is a RAID disk array with 6 drives,
>> with a bit more than 1Tbyte total storage.  15,000 RPM.  It would be
>> hard to get more/faster disk than that.
>>
>
> What kind of RAID?  It's _easy_ to get faster disk that 6 drives in
> RAID5, even if they're 15,000 RPM.  The rotation speed is the least
> of your problems in many RAID implementations.

Oh, and the driver rev means a lot too.  Some older driver revisions for
some RAID cards are very slow.

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