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Microsoft Exchange Performance Counters

Microsoft Exchange Mailbox Server Information Store counters

The following table shows information store counters for determining user load.

Counter Name Description
MSExchangeIS Client (*)\RPC Average Latency RPC Average Latency is a server RPC latency, in ms, averaged for the past 1,024 packets.
MSExchangeIS Client(*)\Directory Access: LDAP Reads/sec Shows the current rate that LDAP reads occur while processing requests for the client. Used to determine the current LDAP read rate per protocol.
MSExchangeIS Client(*)\Directory Access: LDAP Searches/sec Shows the current rate that LDAP searches occur while processing requests for the client. Used to determine the current LDAP search rate per protocol.
MSExchangeIS Client(*)\JET Log Records/sec Shows the rate that database log records are generated while processing requests for the client. Used to determine current load.
MSExchangeIS Client(*)\JET Pages Read/sec Shows the rate that database pages are read from disk while processing requests for the client. Used to determine current load.
MSExchangeIS Client(*)\RPC Operations/sec Shows what client protocol is performing an excessive amount of RPC Operations/sec. High IMAP4, POP3, or Outlook Anywhere latency can indicate problems with Client Access servers rather than Mailbox servers. This is especially true when other clients (which includes MAPI) latency is lower in comparison. In some instances, high IMAP latencies could indicate a bottleneck on the Mailbox server in addition to the latencies that the Client Access server is experiencing.
MSExchangeIS Mailbox(_Total)\Messages Delivered/sec Shows the rate that messages are delivered to all recipients. Indicates current message delivery rate to the store.
MSExchangeIS Mailbox(_Total)\Messages Sent/sec Shows the rate that messages are sent to transport. Used to determine current messages sent to transport.
MSExchangeIS Mailbox(_Total)\Messages Submitted/sec Shows the rate that messages are submitted by clients. Used to determine current rate that messages are being submitted by clients.
MSExchangeIS Public(_Total)\Replication Receive Queue Size Shows the number of replication messages waiting to be processed.
MSExchangeIS\User Count Shows the number of users connected to the information store. Used to determine current user load.