Re: direct path write wait

Hi

You can truss database writer, if AIO is enabled you should see something
like

kaio(AIONOTIFY, -2226439408)
kaio(AIOWAIT, 0xFFFFFFFF7FFFDFA0)



On 12/27/06, blr_dba <deepak_blr@xxxxxxxxxxx> wrote:


Dear Gurus,

Am having huge amount of waits on "direct path write event". This event
has
98% of the total wait time. Now we want to tune it.

We are using Solaris 9 and Oracle 9.2.0.7.

After examining the system we found that logging is enabled on the mounted
UFS file systems.

Need your expert advice on the following...

> How to know whether the UFS is enabled for asynchronous IO or direct IO?
> Which one is better for DWH environments? Pros and cons of each.
> Is filesystem cache is involved in both of the above methods?

Please suggest the best solution for my environment.

Looking forward to your ever valuable feedback.

Deepak

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