Index Contention

Hi,
Oracle Version:- Oracle Database Enterprise Edition Release 10.2.0.1
OS- Microsoft Windows 64-Bit 2003R2
Whenever load on db is increased , my EM shows follwing to me: IX-Lock Contention Found, and Latch- Cache Buffer Chains.
Can someone please explain what does this mean ?. And what may be possible causes for it ?
Vinita

Dear Vinita,
Let me tell you the magical keyword in your expression;
Whenever load on db is increasedWhat sort of load? Oracle does not create the lock and latch contention by itself but the application can cripple the database so bad!
First observe your application and see what the sessions are doing. Run ASH to find out the queries. Run AWR and see the ADDM findings (if you have already purchased the diagnostic pack for your production system, if you are on a test environment just run).
You can also see the metalink for those events and their information.
At the end those are contentions and needs to be observed in my opinion.
Regards.
Ogan

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SNAP_ID DBID INSTANCE_NUMBER CLASS WAIT_COUNT TIME
21454 3937665896 1 data block 195089769 33899167
21455 3937665896 1 data block 195095958 33902183
21456 3937665896 1 data block 195096398 33902377
21457 3937665896 1 data block 195097225 33902843
21458 3937665896 1 data block 195628987 34037147
21459 3937665896 1 data block 195944006 34055524
21460 3937665896 1 data block 195944496 34055642
21461 3937665896 1 data block 196183308 34112433
21462 3937665896 1 data block 196213292 34127409
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SNAP_ID EQ REQ_REASON TOTAL_REQ# TOTAL_WAIT# FAILED_REQ# CUM_WAIT_TIME
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21455 TM contention 682939964 14 2735 1750
21456 TM contention 682950668 14 2735 1750
21457 TM contention 682967980 14 2735 1750
21458 TM contention 682983109 14 2735 1750
21459 TM contention 682998136 14 2735 1750
21460 TM contention 683006816 14 2735 1750
21461 TM contention 683018179 14 2735 1750
21462 TM contention 683432945 14 2735 1750
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SYS@sqdb AS SYSDBA> select b.object_name,a.snap_id, a.physical_writes_total,a.physical_writes_delta,a.physical_reads_total,a.physical_reads_delta, a.itl_waits_total,a.itl_waits_delta from dba_hist_seg_stat a,(select object_id,object_name from dba_objects where owner='ABCD') b where snap_id between '21454' and '21462' and a.obj#= b.object_id and a.itl_waits_delta> 0 order by itl_waits_delta,2,1;
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