Re: Concurrent i/o

From: Fabrizio Magni <fabrizio.magni_at_mycontinent.com>
Date: Tue, 08 Nov 2005 19:47:01 +0100
Message-ID: <4370f2a2$0$29594$4fafbaef@reader3.news.tin.it>

Connor McDonald wrote:

> Matthias Hoys wrote:
> 

>>Hi,
>>
>>Is anyone using Oracle 10g on AIX with filesystems mounted for concurrent
>>i/o (instead of the default cached i/o) ? Just wanted to know if there are
>>any known disadvantages. Apparently concurrent i/o has nearly the
>>performance of raw devices.
>>
>>Thanks
>>Matthias

> 
> 
> If "concurrent" is equivalent to "direct" IO, then you'll want to ensure

more like: direct I/O + async I/O

For the OT: I have it on several systems and I didn't hit any issue/bug so far.

But I have read something on metalink regarding higher time during recovery.

Regards

-- 
Fabrizio Magni

fabrizio.magni_at_mycontinent.com

replace mycontinent with europe

Received on Tue Nov 08 2005 - 12:47:01 CST