Cognos 8.4.1 Unexpected shutdown

[smtest]

I noticed a very different behavior where cognos services went down and came back. I noticed that change in cognos connection. On the server everything is running fine. Do you know why it happened

[MFGF]

Are there any clues in the cogserver.log file?

MF.

[jive]

Hi SMtest,
We shutdown our cognos server 3 times a week. Everytime the performance return to normal after a restart. I search why this  performance degradation append so fast but I can't find a clue.

Regards Jacques