Microsoft Exchange Mailbox Server Client Related Search counters

The following table shows client-related search counters.

Counter Name	Description
MSExchangeIS Mailbox(*)\Search Task Rate
MSExchangeIS Mailbox(*)\Slow Findrow Rate	Shows the rate at which the slower FindRow needs to be used in the mailbox store.
MSExchangeIS\Slow QP Threads	Shows the number of query processor threads currently running queries that aren't optimized.
MSExchangeIS\Slow Search Threads	Shows the number of search threads currently running queries that aren't optimized.