| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
 |
 | |||
| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
|
| |||
Home -> Community -> Mailing Lists -> Oracle-L -> RE: Excessive Paging - AIX Related?
Do any of the tables/indexes have parallel degreee > 1?
Jared
"Post, Ethan"
<Ethan.Post_at_ps To: Multiple recipients of list ORACLE-L
<ORACLE-L_at_fatcity.com>
.net> cc:
Sent by: Subject: RE: Excessive Paging - AIX
Related?
root_at_fatcity.c
om
12/20/01 12:10
PM
Please respond
to ORACLE-L
The bottleneck is hdisk0 which is swap, no datafiles or anything else
there.
The rest of the IO is spread out pretty nicely, archiver interferes with
redo at times but nothing I can do about it until I get some disk moved
from
dev to prod. shared pool is 100M, from experience this is the right size
for J.E. Edwards Oneworld, free space runs low and no misses or request
failures. Buffer pool is 2 GB with 500 MB in a keep pool, I have some
large
freqently accessed tables that will be going there (address book, chart of
accounts and perhaps a few others.) A small amount is configured for
recycle
and the rest standard buffer cache. It is likely more than I need a the
moment but the box has 4 GB and Oracle is the only large app on it. There
should be plenty of memory free. I am trying to hammer the system now and
can not produced the poor results I had last night. I have seen the same
problem on my dev box when user run large address book reports. In that
case the app is on the same box as the db. If it continues I will get the
admin to put swap across more disks. I think the increase may have helped
though I don't really understand how. It seems this is one of those things
that is really a black art. Check aix newsgroups, docs, here and there and
you can find a lot of people who experience the same things but not a lot
of
clear anwers. I know the contention is swap and hdisk0 I just can't get
anyone to tell me why the heck we even need to go to swap so quickly and
why
is swap show 60% free? I am having my admins put a call into IBM since
they
can not answer these questions and I feel they should be able to.
-----Original Message-----
Sent: Thursday, December 20, 2001 1:25 PM
To: Multiple recipients of list ORACLE-L
One thing that jumps right out is 50% IO waits.
You need to find out which disk(s) are so overloaded.
Analyze the stats from v$filestat to see what's going on at the database level.
Q: Why is your SGA 2 gig, and how is it partitioned?
db_block_buffers:
shared_pool:
other pools:
Jared
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author:
INET: Jared.Still_at_radisys.com
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists --------------------------------------------------------------------To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Received on Thu Dec 20 2001 - 14:47:38 CST
 |
 |