Re: Redo log I/O problems

From: David Sisk <davesisk_at_ipass.net>
Date: Sun, 18 Jul 1999 19:36:11 -0400
Message-ID: <Sotk3.243$w3.416@news.ipass.net>

Hi:

Most single SCSI or comparable disk drives will support about 80 i/o's per second. Make 100 i/o's per second if you're going completely sequential (like in redo logs), make it 60 i/o's per second if we're talking completely random (like most accesses to datafiles).

Regards,

--
David C. Sisk
The Unofficial ORACLE on NT site
http://www.ipass.net/~davesisk/oont.htm

Harry Brewster wrote in message <37916A7F.6142EF60_at_tampabay.rr.com>...
>We have 3-500 meg redo logs on raw devices
>We are are still experiencing problems during heavy loading
>The Unix i/o stats show about 15 i/o per second
>We wrote a 'C' program to write to the disks and was able to achive
>60,000 i/o
>
>Can anyone help
>
>Thanks
>
Received on Sun Jul 18 1999 - 18:36:11 CDT