eG Monitoring
 

Measures reported by XchgStoreVMTest

Each store.exe process of a server has limited amount of memory called the Store Virtual memory that it can address. The XchgStoreVMTest reports statistics related to the usage of the Exchange store's virtual memory.

Measurement Description Measurement Unit Interpretation
Largest_block_size It is the largest free block of virtual memory MB At no point should this value go below 32 MB. As you scale a server to accommodate more users and more usage, the server may run low on virtual memory. When a server is low on virtual memory, overall performance degrades as the low situation forces the store.exe process to use the page file and begin paging rapidly.
Tot_num_16MB_free_blocks The total number of free virtual memory blocks that are greater than or equal to 16MB Number At no point should this value go below 1.
Tot_num_of_free_blocks The total number of free virtual memory blocks regardless of size Number At no point should this value go below 1.
Total_large_free_blocks The sum of all the free virtual memory blocks that are greater than or equal to 16MB MB At no point should this value go below 50 MB.