Performance issues after upgrading to 11g

Question

hello,
We are facing a performance issue after upgrading from 10g to 11g.
as you can see, the tables named APPLSYS.FND_ENV_CONTEXT has grown to 15544880 records,
and oracle is using TABLE ACCESS FULL on it:
DELETE FND_ENV_CONTEXT E
WHERE NOT EXISTS
(SELECT 'X'
FROM FND_CONCURRENT_PROCESSES P
WHERE P.CONCURRENT_PROCESS_ID = E.CONCURRENT_PROCESS_ID)
AND ROWNUM < 10000;
Plan:
DELETE STATEMENT ALL_ROWSCost: 74,345                     
     5 DELETE APPLSYS.FND_ENV_CONTEXT                
          4 COUNT STOPKEY           
               3 HASH JOIN RIGHT ANTI Cost: 74,345 Bytes: 3,108,980 Cardinality: 155,449      
                    1 INDEX FULL SCAN INDEX (UNIQUE) APPLSYS.FND_CONCURRENT_PROCESSES_U1 Cost: 166 Bytes: 315,450 Cardinality: 63,090
                    2 TABLE ACCESS FULL TABLE APPLSYS.FND_ENV_CONTEXT Cost: 69,124 Bytes: 233,173,200 Cardinality: 15,544,880
select num_rows,last_analyzed from dba_tables where table_name='FND_ENV_CONTEXT'
15544880 07/07/2011 12:08:55
please advice.
Ofer

Answer 1

Please see these docs.
Table Fnd_env_context Growing Very Fast [ID 419990.1]
FND Related Tablespaces Growing at Rapid and Excessive Rate [ID 189800.1]
FNDCPPUR Request Does Not Always Delete Files From The File System, Many Files Will Be Denoted As "deletion failed" [ID 1335304.1]
Concurrent Processing - Best Practices for Performance for Concurrent Managers in E-Business Suite [ID 1057802.1]
Concurrent Processing - Purge Concurrent Request and/or Manager Data Program (FNDCPPUR) [ID 104282.1]
Thanks,
Hussein