The performance counters listed in this appendix describe activity on an individual Communicator Web Access server or, if Communicator Web Access is deployed behind a load balancer, on the corresponding array of Communicator Web Access servers.

Search Performance Counters (CWA – 00 – Directory Search)

The following table describes the search performance counters that are available in Communicator Web Access (2007 release) CWA – 00 – Directory Search performance object.

Name	Description
CWA – 000 – Outstanding searches	Total number of outstanding Active Directory searches in the Directory Search component of the Communicator Web Access server.
CWA – 001 – Total searches	Total number of Active Directory searches performed by the Directory Search component of the Communicator Web Access server.
CWA – 002 – Searches/sec	Total number of Active Directory searches per second performed by the Directory Search component of the Communicator Web Access server.
CWA – 003 – LDAP errors	Total number of Lightweight Directory Access Protocol (LDAP) errors that have occurred during Communicator Web Access directory search operations.
CWA – 004 – LDAP errors/sec	Number of LDAP errors per second during directory search operations.
CWA – 005 – Total searches denied because the configuration limit was exceeded	Total number of Communicator Web Access client searches that were not allowed because the server configuration limit for the total outstanding searches was exceeded.
CWA – 006 – Search Latency (ms)	Average time, in milliseconds, it takes to perform a Communicator Web Access LDAP search.

Authentication Performance Counters (CWA – 01 – Authentication Module)

The following table describes the authentication performance counters that are available in Communicator Web Access (2007 release) CWA – 01 – Authentication Module performance object.

Name	Description
CWA – 000 – Outstanding logons	Total number of browsers that are currently attempting to sign in to Communicator Web Access.
CWA – 001 – Successful forms auth logons	Total number of successful sign-ins that used forms-based authentication since the Communicator Web Access virtual server was started.
CWA – 002 – Successful forms auth logon attempts/sec	Number of successful sign-ins per second that use forms-based authentication.
CWA – 003 – Forms auth logon failures	Total number of failed sign-in attempts that used forms-based authentication.
CWA – 004 – Forms auth logon failures/sec	Number of failed sign-in attempts per second that used forms-based authentication.
CWA – 005 – Successful IWA auth logons	Total number of successful sign-ins that used Internet Information Services (IIS) authentication, including NTLM, Kerberos, and single sign on (SSO), since the Communicator Web Access virtual server was started.
CWA – 006 – Successful IWA auth logons/sec	Number of successful sign-ins per second that used IIS authentication, including NTLM, Kerberos, and SSO.
CWA – 007- IWA auth logon failures	Total number of failed sign-in attempts that used IIS authentication, including NTLM, Kerberos, and SSO, since the Communicator Web Access virtual server was started.
CWA – 008 – IWA auth logon failures/sec	Number of failed sign-in attempts per second that used IIS authentication, including NTLM, Kerberos, and SSO.
CWA – 009 – Outstanding authorization attempts	Total number of outstanding sign-in requests that have been authenticated, but are not yet authorized.
CWA – 010 – Authorizations denied	Total number of authenticated sign-in requests for which authorization was denied since the Communicator Web Access virtual server was started.
CWA – 011 – Authorizations denied/sec	Number of authenticated sign-in requests per second for which authorization was denied.
CWA – 012 – LDAP error total	Total number of authorization failures that were due to LDAP errors during binds and searches since the Communicator Web Access virtual server was started.
CWA – 013 – LDAP errors/sec	Number of authorization failures per second that were due to LDAP errors.
CWA – 014 – Logons denied due to server throttling	Total number of sign-in attempts that were not allowed because of server throttling under heavy resource consumption.
CWA – 015 – Logons denied due to server throttling/sec	Number of sign-in attempts per second that were not allowed because of server throttling under heavy resource consumption.
CWA – 016 – Average latency for successful authorization	Average time in milliseconds it takes to perform a successful authorization.

Security Performance Counters (CWA – 02 – Security)

The following table describes the security performance counters that are available in Communicator Web Access (2007 release) CWA – 02 – Security performance object. A spike in the number of ticket check failures can be symptomatic of a denial-of-service attack or an attempt to break into the system.

Name	Description
CWA – 001 – Requests rejected due to invalid ticket	Total number of sign-in requests that were rejected because of an invalid ticket in the request since the Communicator Web Access virtual server was started.
CWA – 002 – Requests rejected due to invalid ticket/sec	Number of sign-in requests per second that were rejected because of an invalid ticket in the request.

Service Performance Counters (CWA – 03 – User session Service)

The following table describes the service performance counters that are available in Communicator Web Access (2007 release) CWA – 03 – User services Session performance object.

Name	Description
CWA – 000 – Total sessions	Total number of Office Communications Server user sessions that have been initiated from Communicator Web Access clients since the Communicator Web Access virtual server was started.
CWA – 001 – Sessions/sec	Number of user sessions per second that are initiated from Communicator Web Access clients with Office Communications Server.
CWA – 002 - Sessions	Number of Communicator Web Access user sessions that are currently active.
CWA – 003 – Peak concurrent sessions	Peak number of concurrent user sessions that have been initiated from Communicator Web Access clients since the Communicator Web Access virtual server was started.
CWA – 004 – Sessions failed to sign in	Total number of user sessions initiated from Communicator Web Access clients that failed to sign in to Office Communications Server since the Communicator Web Access virtual server was started. (Users are authenticated and authorized by Communicator Web Access server, but not by Office Communications Server.)
CWA – 005 – Sessions failed to sign in/sec	Communicator Web Access user sessions per second that failed to sign in to Office Communications Server. (Users are authenticated and authorized by Communicator Web Access server, but not by Office Communications Server.)
CWA – 006 – Sessions signing in	Number of Communicator Web Access users who are currently signing in to Office Communications Server.
CWA – 007 – Total sessions timed out	Total number of Communicator Web Access user sessions that timed out because of communication failure with clients.
CWA – 008 – Sessions timeout/sec	Communicator Web Access user sessions per second that timed out.
CWA – 009 – Average session sign in latency (ms)	Average time, in milliseconds, that it takes a Communicator Web Access user sign in to establish an Office Communications Server session.
CWA – 011 – Average session lifetime (sec)	Average lifetime, in seconds, of a Communicator Web Access session in Office Communications Server.
CWA – 013 – Total requests	Total number of requests that have been processed in the session service since the Communicator Web Access virtual server was started. Requests include both user-initiated actions on the client and software-initiated polling requests.
CWA – 014 – Requests/sec	New session requests per second from Communicator Web Access clients to Office Communications Server.
CWA – 015 – Requests in processing	Number of Communicator Web Access client requests that are currently being processed.
CWA – 016 – Requests to nonexistent sessions	Total number of requests that have targeted nonexistent sessions since the Communicator Web Access virtual server was started.
CWA – 017 – Requests to nonexistent sessions/sec	Number of Communicator Web Access client requests per second that are targeting nonexistent sessions.
CWA – 018 – Total requests failed	Total number of requests that failed to process since the Communicator Web Access virtual server was started.
CWA – 019 – Requests failed/sec	Communicator Web Access client requests per second that failed to process.
CWA – 020 – Total polling requests	Total number of software-initiated polling requests that have been processed since the Communicator Web Access virtual server was started.
CWA – 021 – Polling requests/sec	Incoming software-initiated client polling requests per second in Communicator Web Access.
CWA – 022 – Polling requests in processing	Total number of polling requests that are currently being served.
CWA – 023 – Total instant message sessions	Total number of instant messaging (IM) sessions that have been established since the Communicator Web Access virtual server was started.
CWA – 024 – Instant message sessions/sec	IM sessions established per second.
CWA – 025 – Instant message sessions	Current number of active IM sessions.
CWA – 026 – Total instant messages sent	Total number of instant messages sent since the Communicator Web Access virtual server was started.
CWA – 027 – Instant messages sent/sec	Instant messages sent per second.
CWA – 028 – Total instant messages failed to deliver	Total number of instant messages for which delivery failed since the Communicator Web Access virtual server was started.
CWA – 029 – Instant messages failed to deliver/sec	Instant messages per second for which delivery failed.
CWA – 030 – Total instant messages received	Total number of instant messages received since the Communicator Web Access virtual server was started.
CWA – 031 – Instant messages received/sec	Instant messages received per second.
CWA – 032 – Total times of server throttling
CWA – 033 – Server throttling state	The reason for throttling of new sign-ins: 0: Throttling is off. 1: Throttling due to low available memory (including physical memory and page files, and user mode virtual address space). 2: Throttling due to high system CPU usage. 3: Throttling due to both low available memory and high CPU usage.
CWA – 034 – Total times of invalid requests	Total number of times that the Communicator Web Access virtual server detected invalid requests (that is, malformed XML or syntactically invalid requests).