Re: direct path write wait

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.



Perhaps you might first want to tune the SQL statements that are causing the
writes to tempfiles (sorts, hash_joins, GTT usage)?

Pd

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

--
http://www.freelists.org/webpage/oracle-l






--
-- ALTER SESSION SET EVENTS 'immediate trace name hanganalyze level 4';

Other related posts: