Hi,

We have Oracle 9i installed on Solaris 10 Sun T2000 Machine.

We are inserting at a rate of 350 CPS,but after 1 hr or 2 hrs of stress we find the insertion rate is reduced.
We have 16 OCI sessions used to insert into the database in parallel.

Can anyone help me to achieve the insertion performance.
Even we see the below udump when we are inserting into the database:

Oracle9i Enterprise Edition Release 9.2.0.8.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.8.0 - Production
ORACLE_HOME = <path>
System name: SunOS
Node name: veritas7
Release: 5.10
Version: Generic_118833-36
Machine: sun4v
Instance name: <sid>
Redo thread mounted by this instance: 1
Oracle process number: 21
Unix process pid: 12164, image: oracle@veritas7 (TNS V1-V3)

*** SESSION ID18.3) 2008-05-12 20:47:31.497
Thread checkpoint rba:0x001e7c.00009aaa.0010 scn:0x0000.13e0d059
On-disk rba:0x001e7c.00009f73.0000 scn:0x0000.13e0d5e6
Use incremental checkpoint cache-low RBA
Thread 1 recovery from rba:0x001e7c.00009e96.0000 scn:0x0000.00000000
----- Redo read statistics for thread 1 -----
Read rate (ASYNC): 110Kb in 0.01s => 0.00 Mb/sec
Longest record: 0Kb, moves: 0/485 (0%)
----------------------------------------------
----- Recovery Hash Table Statistics ---------
Hash table buckets = 32768
Longest hash chain = 1
Average hash chain = 15/15 = 1.0
Max compares per lookup = 1
Avg compares per lookup = 950/965 = 1.0
----------------------------------------------
*** 2008-05-12 20:47:31.542
KCRA: start recovery claims for 15 data blocks
*** 2008-05-12 20:47:31.543
KCRA: buffers claimed = 15/15, eliminated = 0
*** 2008-05-12 20:47:31.545
Recovery of Online Redo Log: Thread 1 Group 16 Seq 7804 Reading mem 0
----- Recovery Hash Table Statistics ---------
Hash table buckets = 32768
Longest hash chain = 1
Average hash chain = 15/15 = 1.0
Max compares per lookup = 1
Avg compares per lookup = 965/965 = 1.0
----------------------------------------------


I have no idea abt the above udump.Can anyone help me to analyse the dump if this a cause for the performance.