[cisco-voip] Cancel CallForwardAll was failing-CallManager-4.1(3)

[Muqeemuddin Syed]

We have 7825 running CCM 4.1(3) in a two node cluster, publisher and
subscriber.
All IP Phones and end points are registering to the subscriber.
We have recently (2 weeks ago) upgraded from CCM 3.3(5) to 4.1(3) and have
been facing several issues evern since then. I presume that the new version
needs beefed up servers .

We had a problem that users were unable to cancel call forward all.
We tried all possible ways, cancel CFwdAll from Call Manager, from the users
web interface and even deleted and re-created the IP Phone and the Users
profile. All failed.
Finally we looked at a Cisco troubleshooting tip Document ID 91213 and it
said that with 7960 phones and call manager version 3.0 and above there
could be a problem with low disk space on server and the database layer
monitoring service.

We restarted the Cisco Database Layer Monitoring service on the subscriber
first (no improvement) and then on the publisher (after about 2 minutes it
worked fine).
All users are now able to cancel call forward all.

I noticed that earlier after the users had enabled the CFwdAll, there would
be either no change when they press the CFwdAll again or they would get a
busy out tone.

Can anyone confirm if the issue is because our CallManager Publisher is
overloaded. How do we conduct performance monitoring on Call Managers?
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