Performance Data System Is Low On PTE's

This alert condition indicates that the system is running low on Page Table Entries (PTEs). A page table is the data structure used by the Windows Virtual Memory Manager (VMM) to store the mapping between virtual addresses and physical addresses in memory. The performance counter Free System Page Table Entries is the number of page table entries not currently used by the system. From the process perspective, each element of virtual address conceptually refers to a byte of physical memory. It is the responsibility of the Virtual Memory Manager (VMM) in conjunction with processor memory management unit (MMU) to translate or map each virtual address into a corresponding physical address. The VMM performs the mapping by dividing the RAM into fixed-size page frames, creating system PTEs to store information about these page frames, and mapping them. System PTEs are small kernel-mode buffers of memory that are used to communicate with the disk I/O subsystem and the network. Each PTE represents a page frame and contains information necessary for the VMM to locate a page.

Last modified April 17, 2020