Performance Counters provided by LSM and LDL

Applies to: Lync 2010 | Lync 2013 | Lync Server 2010 | Lync Server 2013

LDL and LSM provide a number of performance counters. They are described in the following table and may be accessed using Perfmon.

Performance counters by LSM

Performance counter	Description
# Messages received	Total number of call related messages received
# call messages sent overall	Total number of call related messages sent successfully - counting every destination
# unique call messages sent	Total number of unique call related messages attempted to send (regardless of how many destinations)
# call messages failed	Total number of send failures (regardless whether resending succeeded)
# undelivered messages	Total number messages that were not received at a destination - even with attempting to resend
# messages failed processing	Total number messages that failed during processing
# messages / sec	Number of messages sent per second
# length of longest queue	Longest send message queue
# incoming messages / sec	Rate of incoming call related messages
# messages processing time (ms)	Processing time per message (ms)
# calls tracked in the cache	Number of messages currently in the state cache
# collisions in the cache	Number of colliding concurrent updates in the state cache
# of past due calls being processed	Number of calls being processed for a state update being past due
# Average message delivery time	Time in ms from attempting to send a message to actually receive a delivery confirmation (including resending attempts).

Performance counters by LDL

Performance counter	Description
# Messages received	Total number of call related messages received
# call messages sent overall	Total number of call related messages sent successfully - counting every destination
# unique call messages sent	Total number of unique call related messages attempted to send (regardless of to how many destinations)
# call messages failed	Total number of send failures (regardless whether resending succeeded
# undelivered messages	Total number messages that were not received at a destination - even when there were attempts to resend them.
# messages failed processing	Total number messages that failed during processing
# messages / sec	Number of messages sent per second
# length of longest queue	Longest send-message queue
# messages attempted to send	Number of messages currently attempted to send.
# messages attempted to send overall	Number of messages overall attempted to send.
# Average message delivery time	Time in ms from attempting to send a message to actually receive a delivery confirmation (including resending attempts).