These problems occur when the maximum size paged of non-paged pool that
can be allocated by one process has been limited on the Microsoft Exchange
Server computer.
The non-paged pool is an area of system memory reserved for objects that
must remain in physical memory as long as they are active. The paged
pool is an area of system memory reserved for objects that can be paged to
disk when they are not being used.
The maximum amount of space that can be allocated by one process in the
paged and non-paged pools is controlled with the following registry keys:
PagedPoolQuota
NonPagedPoolQuota
These registry keys are located in the following registry path:
HKEY_LocalMachine\SYSTEM\CurrentControlSet\Control\Session
Manager\Memory Management
The default value of these registry keys is 0. If a nonzero value between 1
and 128 has been specified, no single process can allocate more space in
the pool than the specified amount.
When value of these registry keys is set to 0, there are no pool quotas.