Re: Postgres on RAID5 - Mailing list pgsql-performance

From Greg Stark
Subject Re: Postgres on RAID5
Date
Msg-id 87zmx6rni0.fsf@stark.xeocode.com
Whole thread Raw
In response to Re: Postgres on RAID5  (Alex Turner <armtuk@gmail.com>)
Responses Re: Postgres on RAID5
List pgsql-performance
Alex Turner <armtuk@gmail.com> writes:

> a 14 drive stripe will max out the PCI bus long before anything else,

Hopefully anyone with a 14 drive stripe is using some combination of 64 bit
PCI-X cards running at 66Mhz...

> the only reason for a stripe this size is to get a total accessible
> size up.

Well, many drives also cuts average latency. So even if you have no need for
more bandwidth you still benefit from a lower average response time by adding
more drives.

--
greg

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