Microsoft Exchange Performance Counters

Microsoft Exchange Mailbox Server Mailbox Assistant counters

The following table shows mailbox assistant counters.

Counter Name Description
Counter Name: MSExchange Assistants(*)\Average Event Processing Time in Seconds Description: Shows the average processing time of the events chosen.
Counter Name: MSExchange Assistants(*)\Events in queue Description: Shows the number of events in the in-memory queue waiting to be processed by the assistants.
Counter Name: MSExchange Assistants(*)\Events Polled/sec Description: Shows the number of events polled per second. Determines current load statistics for this counter.
Counter Name: MSExchange Assistants(*)\Mailboxes Processed/sec Description: Shows the rate of mailboxes processed by time-based assistants per second. Determines current load statistics for this counter.
Counter Name: Process(MSExchangeMailboxAssistants)\%Processor Time Description: Shows the amount of processor time being consumed by mailbox assistants.