I think a good start would be to do level 8 10046 trace and see what the waits are.
Probably disk waits, but the question of course is 'why?'. Before you can
ask that though, you need to be sure what you're waiting on.
Jared
|
| "John Blake" <jblake@arrow.com>
Sent by: ml-errors@fatcity.com
12/19/2003 08:24 AM
Please respond to ORACLE-L
|
To: Multiple recipients of list ORACLE-L <ORACLE-L@fatcity.com>
cc:
Subject: problem with mult datafiles and local mng tblspaces |
I have a 9.2.0.3 DB running on AIX 4.3.3
An application running on W2K using SQLLDR to load approx 6g of data
using local managed tablespaces
ie..
CREATE TABLESPACE PARENTDAT
DATAFILE '/vol01/oradata/e450dev/parentdat01.dbf' SIZE 2000M REUSE,
'/vol01/oradata/e450dev/parentdat02.dbf' SIZE 2000M REUSE,
'/vol01/oradata/e450dev/parentdat03.dbf' SIZE 2000M REUSE,
'/vol01/oradata/e450dev/parentdat04.dbf' SIZE 2000M REUSE
EXTENT MANAGEMENT LOCAL UNIFORM SIZE 1M
NOLOGGING
ONLINE;
It was taking 8 hours to load this data
1) copied the data to the AIX box and ran SQLLDR local to the DB and
received similar results
2) changed the tablespace to contain 1 8g datafile
3) ran SQLLDR from the W2K machine ..completed in 30minutes
Also
ran the same test on AIX 5.1 running oracle 9.2.0.3 and obtained the same
results.
I really would like to be able to create the tablespaces with multiple data
files but it seems whenever I add a datafile the
performance of the load degrades.
Any ideas??
Thanks in advance
John
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Received on Fri Dec 19 2003 - 12:39:26 CST
