RE: Yet another request for your experiences

On VMS, I believe the I/O is async by default (probably via $QIO calls), so there's no benefit there. This is from memory, as I'm not able to confirm or deny that with a quick search.

On HP/UX, you can't use async with a cooked volume, and in MetaLink 139272.1 it says not to use multiple DBWRs with async ("not recommended"). It doesn't state wether or not this is generic advice or platform specific.

HTH! :)

Rich Jesse                           System/Database Administrator
Rich.Jesse_at_qtiworld.com              Quad/Tech International, Sussex, WI USA

> -----Original Message-----
> From: Freeman, Robert [mailto:Robert_Freeman_at_csx.com]
> Sent: Wednesday, September 25, 2002 11:58 AM
> To: Multiple recipients of list ORACLE-L
> Subject: Yet another request for your experiences
>
>
> On a system with ASYNC IO Enabled, have you seen any benefits from
> enabling multiple DBWR processes, and if so how much of an impact
> did you see? I've experimented with this before and didn't see much
> improvement, but I'm curious what others experiences are.
>
> RF

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