What is poolmon?

Answer 1

Poolmon displays data that the operating system collects about memory allocations from the system paged and nonpaged kernel pools and about the memory pools used for Terminal Services sessions. The data is grouped by pool allocation tag. This information can be used by Microsoft Technical Support to find kernel mode memory leaks.

A memory leak is caused by an application or by a process that allocates memory for use but that does not free the memory when the application or process finishes. Therefore, available memory is completely used over time. Frequently, this condition causes the system to stop functioning correctly.