The SMTP NTFS Store Driver performance object counters describe activity of the Exchange NTFS store driver, which is responsible for message transport to and from the message store.
| Counter Name | Description | Counter Type |
|---|---|---|
| Messages allocated | Shows the total number of messages allocated. | PERF_COUNTER_RAWCOUNT |
| Messages deleted | Shows the total number of messages deleted. | PERF_COUNTER_RAWCOUNT |
| Messages enumerated | Shows the total number of messages enumerated during startup. | PERF_COUNTER_RAWCOUNT |
| Messages in the queue directory | Shows the current number of messages in the queue directory. | PERF_COUNTER_RAWCOUNT |
| Open message bodies | Shows the current number of open message bodies. | PERF_COUNTER_RAWCOUNT |
| Open message streams | Shows the current number of open message streams. | PERF_COUNTER_RAWCOUNT |