Re: x206-x225

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От Joost Kraaijeveld
Тема Re: x206-x225
Дата
Msg-id 1142063378.6634.13.camel@localhost
обсуждение исходный текст
Ответ на Re: x206-x225  (Richard Huxton <dev@archonet.com>)
Ответы Re: x206-x225  (David Lang <david@lang.hm>)
Список pgsql-performance
On Fri, 2006-03-10 at 13:40 +0000, Richard Huxton wrote:
> Your ATA disk is lying about disk caching being turned off. Assuming
> each insert is in a separate transaction, then it's not going to do
> 10,000 / 6 = 1667 transactions/sec - that's faster than it's rotational
> speed.
Could you explain the calculation? Why should the number of transactions
be related to the rotational speed of the disk, without saying anything
about the number of bytes per rotation?

--
Groeten,

Joost Kraaijeveld
Askesis B.V.
Molukkenstraat 14
6524NB Nijmegen
tel: 024-3888063 / 06-51855277
fax: 024-3608416
e-mail: J.Kraaijeveld@Askesis.nl
web: www.askesis.nl


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