Re: Planning a new server - help needed - Mailing list pgsql-performance

From Guy Rouillier
Subject Re: Planning a new server - help needed
Date
Msg-id 47F04BA0.9040409@burntmail.com
Whole thread Raw
In response to Re: Planning a new server - help needed  (PFC <lists@peufeu.com>)
List pgsql-performance
PFC wrote:
>
>> Why do you claim that 'More platters also means slower seeks
>> and generally slower performance.'?
>
>     More platters -> more heads -> heavier head assembly -> slower seek
> time
>     But..
>     More platters -> higher density -> less seek distance (in mm of head
> movement) -> faster seek time

More platters means more tracks under the read heads at a time, so
generally *better* performance.  All other things (like rotational
speed) being equal, of course.

--
Guy Rouillier

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