I have a Netware 6.5 Sp 8 server, fully patched, which after 1-2 days of working normally, the CPU suddenly spikes to 100%, with console messages repeating every few minutes:

8-12-2009 2:57:13 pm: SERVER-5.70-0 [nmID=8001D]
Cache memory allocator out of available memory.

8-12-2009 2:57:13 pm: SERVER-5.70-0 [nmID=2000A]
Short term memory allocator is out of memory.
1 attempts to get more memory failed.
request size in bytes 439955920 from Module SERVINST.NLM

Once this starts happening, the CPU remains at 100%, and once rebooted, the server returns back to normal for 1-2 days, and it happens all over again.

This server is also running the following:

Groupwise Internet Agent
Groupwise WebAccess Agent
Groupwise Document Viewer Agent
Apache 2
1x Groupwise MTA (Primary for routing to other seperate servers)
1x Groupwise PoA (0 users)

Can anybody help me with this issue?