Hans,
AFAIK, kproc is the slave process for AIO. How many do you see on your
system? Maybe you have too many of them and are choking on CPU scheduling...
Is your CPU stats Ok at this time? You need to have only as many AIO proces
as there are *simultaneous* requests 300 maybe overkill.
Long time since I even touched AIX (4.2 last) so I may be way off-course
here...
John Kanagaraj
DB Soft Inc
Phone: 408-970-7002 (W)
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-Original Message-
From: Hans de Git [mailto:[EMAIL PROTECTED]
Sent: Tuesday, October 07, 2003 8:44 AM
To: Multiple recipients of list ORACLE-L
Subject: Please help me tune this io done wait event
Hi All,
We suffer buffer busy waits and io done waits during batch
processing. The
batch does direct-path inserts (via Sqlloader and
insert-append) in a 16k
blocksize database (JFS, AIX).
Async io servers = 300, maxreqs = 16384
What is the general approach to tune the io done' wait event? The
explanation in the Oracle manual is -of course- not clear to me:
The session waits for an I/O to complete or it waits for a
slave process to
become available to submit the I/O request. This event occurs
on platforms
that do not support asynchronous I/O.
AIX does support async IOWhat is the slave process? Which
io has to
complete? Which write has to complete?
Thanks.
Regards,
Hans de Git
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