Windows Server 2008 Terminal Services

Memory\Pages/sec

As physical RAM becomes scarce, the virtual memory manager will free up RAM by transferring the information in a memory page to a cache on the disk. Excessive paging to disk might consume too much of the available disk bandwidth and slow down applications attempting to access their files on the same disk or disks. The Pages/Sec counter tracks the total paging rates, both read and writes, to disk.

For capacity planning, watch for upward trends in this counter. Excessive paging can usually be reduced by adding additional memory. Add memory when paging operations absorbs more than 20–50 percent of the total disk I/O bandwidth. Because disk bandwidth is finite, capacity used for paging operations is unavailable for application-oriented ...