I need to restart the database

Hi Guys,
I have migrated my database from oracle 9i to 10gR2 and from 32bit windows to 64bit RHEL4 using full database export and import. Everything works fine. We have got some performance enhancements also.
But one report generation module which was supposed to complete in 25 minutes takes 1-2 hrs. to complete. Most of the time we need to restart the database to complete the operation. After restarting the database it completes within 15 mintutes.
What may be cause of such behaviour, any idea? How should I proceed to resolve the issue? The cursor_sharing paramater is 'FORCE' which was same in our 9i setup also.
Regards,
Santosh

Hi,
>>After restarting the database it completes within 15 mintutes.
It seems this doesn't make sense. Did you gather statistics for the tables? In addition, take a look at AWR from OEM that contains performance statistics and workload information on the database that is captured every hour and preserved for seven days by default. In this case, historical information is important to diagnose a performance problem that has already happened
Cheers
Legatti

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>PCI-GPIB does not like returning from computer power-save mode. I
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>
>It seems volatile memory is lost on the PCI GPIB Card. When the
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