Client Access Server Counters

Artykuł
07/23/2014

Applies to: Exchange Server 2010 SP3, Exchange Server 2010 SP2

This topic provides information about counters relevant to the Client Access server role in Microsoft Exchange Server 2010. You can use Performance Monitor (perfmon.exe) to monitor these counters. For more information, see Performance Monitor Getting Started Guide. For information about other counters relevant to Exchange 2010, see Performance and Scalability Counters and Thresholds.

Outlook Web App Counter

The following table shows a Microsoft Office Outlook Web App counter.

Counter	Description	Threshold
MSExchange OWA\Average Search Time	Shows the average time that elapsed while waiting for a search to complete.	Should be less than 5,000 milliseconds (ms) at all times.

ASP.NET Counters

The following table shows ASP.NET counters.

Counter	Description	Threshold	Troubleshooting
ASP.NET\Application Restarts	Shows the number of times the application has been restarted during the Web server's lifetime.	Should be 0 at all times.
ASP.NET\Worker Process Restarts	Shows the number of times a worker process has restarted on the computer.	Should be 0 at all times.
ASP.NET\Request Wait Time	Shows the number of ms the most recent request was waiting in the queue.	Should be 0 at all times.	Values greater than 0 should be investigated.
ASP.NET Applications(*)\Requests In Application Queue	Shows the number of requests in the application request queue.	Should be 0 at all times.	Values greater than 0 should be investigated.

Availability Service Counter

The following table shows an availability service counter.

Counter	Description	Threshold
MSExchange Availability Service\Average Time to Process a Free Busy Request	Shows the average time to process a free/busy request in seconds. One request may contain multiple mailboxes. Free/busy responses don't have meeting suggestions.	Should always be less than 5.

ActiveSync Service Counters

The following table shows ActiveSync service counters.

Counter	Description	Threshold
MSExchange ActiveSync\Ping Commands Pending	Shows the number of ping commands currently pending on the server.	Ping Commands Pending and Sync Commands Pending are the number of hanging requests, which should be almost equal to the number of Direct Push and hanging sync users.
MSExchange ActiveSync\Sync Commands Pending	Shows the number of sync commands currently pending on the server.	Ping Commands Pending and Sync Commands Pending are the number of hanging requests, which should be almost equal to the number of Direct Push and hanging sync users.
MSExchange ActiveSync\Current Requests	Shows the number of HTTP requests waiting to be assigned to a thread.	Average of 50–100.

RPC/HTTP Proxy Counters (Windows Server 2008 Only)

The following table shows Windows Server 2008 RPC/HTTP proxy counters.

Counter	Description	Threshold
RPC/HTTP Proxy\Number of Failed Back-End Connection attempts per Second	Shows the rate at which the RPC proxy attempts are occurring but failing to establish a connection to a back-end server.	Should be 0 at all times.
RPC/HTTP Proxy\Current Number of Incoming RPC over HTTP Connections	Shows the current number of front-end HTTP connections. Determines current user load.	Not applicable.
RPC/HTTP Proxy\Current Number of Unique Users	Shows the number of unique users currently connected to a back-end server via RPC/HTTP. Determines current user load.	Not applicable.
RPC/HTTP Proxy\RPC/HTTP Requests per Second	Shows the rate of RPC/HTTP requests sent to the back-end servers. Determines current Microsoft Outlook Anywhere load.	Not applicable.

RPC Client Access Counters

The following table shows RPC Client Access counters.

Counter	Description	Threshold
MSExchange RpcClientAccess\RPC Averaged Latency	Shows the latency, in ms, averaged for the past 1,024 packets.	Should be below 250 ms.
MSExchange RpcClientAccess\RPC Operations/sec	Shows the rate at which RPC operations occur, per second.
MSExchange RpcClientAccess\RPC Requests	Shows the number of client requests currently being processed by the RPC Client Access service.	Shouldn't be over 40.

Address Book Service Counters

The following table shows Exchange 2010 address book service counters.

Counter	Description	Threshold
MSExchangeAB\NSPI RPC Browse Requests Average Latency	Shows the average time, in ms, that Name Service Provider Interface (NSPI) browse requests took to complete during the sampling period.	Should be below 1,000 ms.
MSExchangeAB\NSPI RPC Requests Average Latency	Shows the average time, in ms, that NSPI requests took to complete during the sampling period.	Should be below 1,000 ms.
MSExchangeAB\Referral RPC Requests Average Latency	Shows the average time, in ms, that referral requests took to complete during the sampling period.	Should be below 1,000 ms.

Control Panel Counters

The following table shows Exchange 2010 Control Panel counters.

Counter	Description	Threshold
MSExchange Control Panel\Outbound Proxy Requests - Average Response Time	Shows the average time (in ms) that requests sent to a secondary Client Access server took to complete during the sampling period.	The average should be under 6,000 ms.
MSExchange Control Panel\Requests - Average Response Time	Shows the average time (in ms) the Exchange Control Panel took to respond to a request during the sampling period.	The average should be under 6,000 ms.

Client Access Server OAB Download Counters

The following table shows Client Access server offline address book (OAB) download counters.

Counter	Description	Threshold	Troubleshooting
MSExchangeFDS:OAB(*)\Download Task Queued	Shows the number of OAB download tasks queued since the File Distribution service started.	Should be 0 at all times.	Values greater than 0 indicate a failure to copy OAB data files from Mailbox servers.
MSExchangeFDS:OAB(*)\Download Tasks Completed	Shows the number of OAB download tasks completed since the File Distribution service started. The default value is every 480 minutes or 8 hours.	Should be less than or equal to 3 per day.	Values greater than 3 per day indicate the schedule for the Client Access server to download updated OAB files isn't a default schedule.

Client Activity Counters

The following table shows client activity counters.

Counter	Description	Threshold
MSExchangeIS\RPC Client Backoff/sec	Indicates the rate at which client backoffs are occurring. Higher values may indicate that the server may be incurring a higher load resulting in an increase in overall averaged RPC latencies, causing client throttling to occur. This can also occur when certain client user actions are being performed. Depending on what the client is doing and the rate at which RPC operations are occurring, it may be normal to see backoffs occurring.	Not applicable.