Ever seen this: % Low on memory; try again later

[Faizi]

Hello everyone,

My cisco unified call manager has gotten this error (Low on memory; try again later) How to resolve this problem, please?

[TechLvr]

Have you tried rebooting your CUCM? 
A reboot usually fixes these types of issues which arise from memory leaks due to bugs or hung services due to high uptimes. 

[Leo Laohoo]

Either raise a TAC Case and get TAC to investigate the memory leak or reboot the CUCM.  

Rebooting alone means the problem will come back later.  

[Faizi]

Thank you for your reply, But dear how to fix or use the TAC command in cisco please explain to me the easy way.

[Leo Laohoo]

Send an email to TAC with the serial number or a valid Service Contract.