I've been testing quite a lot about it. First you need to know that the
configuration is different in each platform. And some of them don't support
async. F.e., in AIX you set two kernel parameters and init.ora parameter, in
Hp-Ux you need to create the device, change a kernel
parameter.......................
Second, and referring to my experience, in Aix and HP-UX, the performance is
worse than without it or even worse with multiple dbwriters. In Sun 2.5.1. I
achieved a great performance. However Sun 2.6 and 7 doesn't give you with
async the same response comparing with multiple dbwriters.
Third, as I test it, I suffered several bugs. F. e., resizing a database
which has async.
Regards-
> -----Mensaje original-----
> De: [EMAIL PROTECTED]
> [SMTP:[EMAIL PROTECTED]]
> Enviado el: jueves 1 de febrero de 2001 12:47
> Para: Multiple recipients of list ORACLE-L
> Asunto: Réf. : Re: asyn i/o on sun or hp
>
>
> Hello,
>
> I am intereseted in having more information about ASYN I/O :
> What is ASYN I/O ?
> Advanteges ? Desadvanteges ?...
> When it is good to activate ASYN I/O .
> NT/W2k & ASYN I/O ?
>
> Thanks
>
> Sofiane
>
>
>
>
> K
>
> Gopalakrishna Pour : Multiple recipients of
> list ORACLE-L <[EMAIL PROTECTED]>
> n cc : (ccc : Sofiane
> Ennaifar/DIR/GIECB)
> <kaygopal@yah Objet : Re: asyn i/o on sun
> or hp
> oo.com>
>
>
>
> 31/01/01
>
> 20:47
>
> Veuillez
>
> répondre à
>
> ORACLE-L
>
>
>
>
>
>
>
>
>
>
> Hi !
>
> There is an event (I think it is 10351) can be used to
> trace the AIO system calls and this event is specific
> to solaris.
>
> Level 1 traces the errors &
> Level 2 traces the System calls
>
>
>
> =====
> Have a nice day !!
> ------------------------------------------------------------
> Best Regards,
> K Gopalakrishnan,
> Bangalore, INDIA.
>
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