Microsoft Exchange Performance Counters

Microsoft Exchange Mailbox Server Active Log IO Latency Requirements counters

The following table shows active log I/O latency requirements counters. When these values are exceeded, the client experience degrades. For example, users may experience slow system performance and message delivery delays.

Counter Name Description
Counter Name: Database\Log Record Stalls/sec Description: Indicates the number of log records that can't be added to the log buffers per second because the log buffers are full.
Counter Name: Database\Log Threads Waiting Description: Indicates the number of threads waiting to complete an update of the database by writing their data to the log.
Counter Name: MSExchange Database\IO Log Writes Average Latency Description: Indicates the average time, in ms, to write a log buffer to the active log file.