Re: Is Async IO being Used or NOT ?

From: LS Cheng <exriscer_at_gmail.com>
Date: Wed, 5 Nov 2008 18:48:55 +0100
Message-ID: <6e9345580811050948j7751a8bat7616cc456d272924@mail.gmail.com>


aio is only posible with raw devices in hp-ux unless you use odm on vxfs

Thanks

--
LSC


On Wed, Nov 5, 2008 at 8:35 AM, VIVEK_SHARMA <VIVEK_SHARMA_at_infosys.com>wrote:


> Folks
>
>
>
> Need to find out if Async IO is setup & working or NOT in our Performance
> Benchmark Setup.
>
>
>
> Qs 1 - What *HP-UX Command* gives the existing *filesystemio_options *settings
> for the mounted filesystem ?
>
> NOTE - Init.ora parameter disk_async_io=true (default)
>
>
>
> Qs 2 For Async IO to work, is there a dependency or NOT on the existence
> of the file "*/dev/async"* ? This file does NOT exist Currently Is the
> presence of this file merely to suppress the below Error Message in Oracle
> Trace files.
>
>
>
> Oracle *Trace Files* currently contain the *Message:-*
>
> Error - File '/dev/async' not present : errno=2
>
>
>
> Related Link -
> http://sap.ittoolbox.com/groups/technical-functional/sap-basis/ecc-upgrade-phase-tabimupg-error-1790565
>
>
>
>
>
> *Existing Configuration:-*
>
> *Oracle 10.2.0.1*
>
> System name: HP-UX
>
> Node name: SPEHPPA1
>
> Release: * B.11.11*
>
> Version: U
>
> Machine: 9000/800
>
> Instance name: LOSDB
>
> Redo thread mounted by this instance: 1
>
> Oracle process number: 0
>
> Unix process pid: 21553, image: oracle_at_SPEHPPA1
>
>
>
> Will provide any info needed . Cheers & Thanks V much
>
>
>
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Received on Wed Nov 05 2008 - 11:48:55 CST

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