All my NW boxes are VM on vSphere

After upgrading to latest edir87310_ftf2:

Loaded from [SYS:SYSTEM\] on 17 Feb 2011 10:03:38 am
(Address Space = OS)
Novell eDirectory Version SMP
Version 10554.64 10 October 2009

I get Cache memory allocator out of available memory. daily

Before it used to happen once in a while
Each VM has pleanty of RAM assigned

Anybody has a solution?