Windows uses the Pagefile.sys paging file to handle any extra demands for memory. The paging file is a block of disk space reserved by the operating system so that the memory manager can free space in memory when necessary. It does so by writing pages not often referenced to the paging file on disk. You can monitor the size of the paging file to determine whether you should add more memory to your system using the NT Page File Performance group.
Class: ntPageFilePerf
The NT Page File Performance group includes the following MIB objects:
Provides the percentage of the page file space currently being used.
Provides the maximum percentage of the page files that were used when memory demand was at its peak.
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