I have two MWG 22.214.171.124.0 that show this error each two weeks:
The log file
[2013-04-15 10:08:30.216 +02:00] [Anti-Malware Engine] [SharedMemMapError] Cannot map into shared memory object, errno: 12, errno string: 'errno: 12 - 'Cannot allocate memory''.
I have checked that the CPU, Disk
When this problem occurs MWG continue working for a while and then it discard all requests. The only workaround is reboot the appliance twice and update manually the antivirus engine.
Thanks a lot.