RE: OT: high WIO on Linux
- From: "Kevin Closson" <kevinc@xxxxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 14 Mar 2006 07:42:28 -0800
>>>In theory, Oracle's dbwr is supposed to be able to initiate
>>>other io requests while wating for any given one to
>>>complete. In practice there seems to be an empyrical limit
>>>to this, not very clear why.
The only limiting factor on dbwr outstanding IO requests is
the lower-level io queue depth. If you have really fast IO and
really deep queues, you can see dbwr with well over a thousand
outstanding IO requests.
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