ERP database did not shutdown

Question

Hi
We have Oracle ERP R12.0.6 running on single node configuration. Usually we take full offline backups on friday morning. Even after issuing the command > shutdown immediate, database did not shutdown for 2 hours as some 'Create accounting' concurrent program was running for past 44 hours. Why database did not kill this session? Is our SGA or redolog files size are not proper?
How to diagnose this issue?
Regards
Ariz

Answer 1

Hi
I reviewed the alert log. When this shutdown immediate was running i was watching alert log and few of them as follows:
Fri May 6 07:04:12 2011
Starting background process EMN0
EMN0 started with pid=24, OS id=1904666
Fri May 6 07:04:12 2011
Shutting down instance: further logons disabled
Fri May 6 07:04:14 2011
Stopping background process QMNC
Fri May 6 07:04:14 2011
Stopping background process CJQ0
Fri May 6 07:04:19 2011
Stopping background process MMNL
Fri May 6 07:04:20 2011
Stopping background process MMON
Fri May 6 07:04:23 2011
Shutting down instance (immediate)
License high water mark = 262
Fri May 6 07:04:23 2011
Stopping Job queue slave processes
Fri May 6 07:04:23 2011
Job queue slave processes stopped
Fri May 6 07:09:22 2011
Active call for process 2142404 user 'oramgrl' program 'oracleSCC@ebsprod'
Active call for process 995354 user 'oramgrl' program 'oracleSCC@ebsprod'
SHUTDOWN: waiting for active calls to complete.
Fri May 6 07:13:56 2011
Incremental checkpoint up to RBA [0xb28.185c2e.0], current log tail at RBA [0xb28.185c3b.0]
Fri May 6 07:23:48 2011
MMNL absent for 1206 secs; Foregrounds taking over
Fri May 6 07:34:01 2011
Incremental checkpoint up to RBA [0xb28.185d1c.0], current log tail at RBA [0xb28.185d1c.0]
Fri May 6 07:47:56 2011
Beginning log switch checkpoint up to RBA [0xb29.2.10], SCN: 3320888564
Thread 1 advanced to log sequence 2857
Current log# 2 seq# 2857 mem# 0: /scclive/oracle/db/apps_st/data/log02a.dbf
Current log# 2 seq# 2857 mem# 1: /scclive/oracle/db/apps_st/data/log02b.dbf
Fri May 6 07:48:46 2011
Completed checkpoint up to RBA [0xb29.2.10], SCN: 3320888564
Fri May 6 07:54:36 2011
Incremental checkpoint up to RBA [0xb29.3372a.0], current log tail at RBA [0xb29.4ba21.0]
Yes, you are right. Using the other session, i had issue shut abort and it has resolved the issue. We have job_queue_processes = 2 and aq_tm_processes=1.
But my concern is, i cannot add >shut abort command in my script. What is the other alternative or what parameter to be tuned? Please guide me.
Regards
Ariz