Microsoft IIS monitoring & observability

Metric name	Metric key	Description	Unit
Total Bytes Sent	iis.total.bytes.sent.count	The number of data bytes that have been sent by the Web service (since service startup).	Byte
Total Bytes Received	iis.total.bytes.received.count	The number of data bytes that have been receivPed by the Web service (since service startup).	Byte
Total Bytes Transferred	iis.total.bytes.transferred.count	Total bytes either received or sent by the Web service (since service startup).	Byte
Total GET Requests	iis.total.get.requests.count	The number of HTTP requests using the GET method (since service startup). Get requests are the most common HTTP request.	Count
Total POST Requests	iis.total.post.requests.count	The number of HTTP requests using the POST method (since service startup).	Count
Total Method Requests	iis.total.method.requests.count	The number of all HTTP requests (since service startup).	Count
Total Method Requests per Second	iis.method.requests.persec	The rate HTTP requests are received.	PerSecond
Current Connections	iis.current.connections.gauge	Current Connections is the current number of connections established with the Web service.	Count
Service Uptime	iis.service.uptime	The length of time the Web Service has been running.	Second
Total Files Received	iis.total.files.received.count	The total number of files received by the Web service (since service startup).	Count
Total Files Sent	iis.total.files.sent.count	The total number of files sent by the Web service (since service startup).	Count
Total Connection Attempts (All instances)	iis.total.connectionAttempts.allInstances.count	Total Connection Attempts is the number of connections that have been attempted using the Web service (since service startup). This counter is for all instances listed.	Count
Total App Pool Uptime	iis.total.applicationPool.uptime	The length of time, in seconds, that the application pool has been running since Windows Process Activation Service (WAS) started.	Second
Current number of worker processes	iis.current.workerProcesses	The current number of worker processes that are running in the application pool.	Count
Maximum number of worker processes	iis.maximum.workerProcesses	The maximum number of worker processes that have been created for the application pool since Windows Process Activation Service (WAS) started.	Count
Total App Pool Recycles	iis.total.applicationPool.recycles.count	The number of times that the application pool has been recycled since Windows Process Activation Service (WAS) started.	Count
Current Application Pool Uptime	iis.current.applicationPool.uptime	The length of time, in seconds, that the application pool has been running since it was started.	Second
Time Since Last Worker Process Failure	iis.timeSinceLast.workerProcess.failure	The length of time, in seconds, since the last worker process failure occurred for the application pool.	Second
Recent Worker Process Failures	iis.APPPOOLWAS.RecentWorkerProcessFailures	The number of times that worker processes for the application pool failed during the rapid-fail protection interval.	Count
Total Worker Process Failures	iis.APPPOOLWAS.TotalWorkerProcessFailures	The number of times that worker processes have crashed since the application pool was started.	Count
Total Worker Process Ping Failures	iis.APPPOOLWAS.TotalWorkerProcessPingFailures	The number of times that Windows Process Activation Service (WAS) did not receive a response to ping messages sent to a worker process.	Count
Total Worker Process Shutdown Failures	iis.APPPOOLWAS.TotalWorkerProcessShutdownFailures	The number of times that Windows Process Activation Service (WAS) failed to shut down a worker process.	Count
Total Worker Process Startup Failures	iis.APPPOOLWAS.TotalWorkerProcessStartupFailures	The number of times that Windows Process Activation Service (WAS) failed to start a worker process.	Count
Cache Hit Rate	iis.cache.hitRate	Rate of cache hits for the queue	Percent
Current Queue Size	iis.current.queue.size	Number of requests in the queue	Count
Arrival rate	iis.HTTPServiceRequestQueues.ArrivalRate	Rate at which requests are arriving in the queue	PerSecond
Max age of requests in queue	iis.HTTPServiceRequestQueues.MaxQueueItemAge	Age of the oldest request in the queue	Second
Rejected requests	iis.HTTPServiceRequestQueues.RejectedRequests	Total number of requests rejected from the queue	Count
Rejected request rate	iis.HTTPServiceRequestQueues.RejectionRate	Rate at which requests are rejected from the queue	PerSecond
Application Pool State	iis.current.applicationPool.state	State metric for Application Pools. State is expressed in the 'App Pool' dimension. (1 - Uninitialized, 2 - Initialized, 3 - Running, 4 - Disabling, 5 - Disabled, 6 - Shutdown Pending, 7 - Delete Pending).	Unspecified

Metric name	Metric key	Description	Unit
All requests	iis.HTTPServiceUrlGroups.AllRequests.count	Total number of HTTP requests made for this site	Count
Bytes received rate	iis.HTTPServiceUrlGroups.BytesReceivedRate	Rate of received data by HTTP service for this site	PerSecond
Bytes sent rate	iis.HTTPServiceUrlGroups.BytesSentRate	Rate of sending data by HTTP service for this site	PerSecond
Bytes transferred rate	iis.HTTPServiceUrlGroups.BytesTransferredRate	Rate of total bytes transferred (sent and received) by HTTP service for this site	PerSecond
Connection attempts rate	iis.HTTPServiceUrlGroups.ConnectionAttempts	Rate at which connection attempts are being made for this site	PerSecond
Current connections	iis.HTTPServiceUrlGroups.CurrentConnections	Number of current connections established for this site	Count
GET requests per second	iis.HTTPServiceUrlGroups.GetRequests	Rate at which GET method requests are made for this site	PerSecond
HEAD requests per second	iis.HTTPServiceUrlGroups.HeadRequests	Rate at which HEAD method requests are made for this site	PerSecond
Max connections	iis.HTTPServiceUrlGroups.MaxConnections	Maximum number of concurrent connections established for this site	Count

Metric name	Metric key	Description	Unit
Total HEAD Requests	iis.total.head.requests.count	The number of HTTP requests using the HEAD method (since service startup). Head requests generally indicate a client is querying the state of a document they already have to see if it needs to be refreshed.	Count
Total PUT Requests	iis.total.put.requests.count	The number of HTTP requests using the PUT method (since service startup).	Count
Total DELETE Requests	iis.total.delete.requests.count	The number of HTTP requests using the DELETE method (since service startup). Delete requests are generally used for file removals.	Count
Total OPTIONS Requests	iis.total.options.requests.count	The number of HTTP requests using the OPTIONS method (since service startup).	Count
Total TRACE Requests	iis.total.trace.requests.count	The number of HTTP requests using the TRACE method (since service startup). Trace requests allow the client to see what is being received at the end of the request chain and use the information for diagnostic purposes.	Count

Metric name	Metric key	Description	Unit
File cache hits	iis.W3SVC_WebServiceCache.FileCacheHits.count	Total number of successful lookups in the user-mode file cache (since service startup).	Count
Kernel URI cache hits	iis.W3SVC_WebServiceCache.KernelURICacheHits.count	Total number of successful lookups in the kernel URI cache (since service startup).	Count
Output cache current hits percent	iis.W3SVC_WebServiceCache.OutputCacheCurrentHitsPercent	Output Cache current hit ratio. Calculated as (H)/(H+M) where H and M represent Hits and Misses in previous sample interval respectively.	Percent

Metric name	Metric key	Description	Unit
Active requests	iis.W3SVCW3WP.ActiveRequests	Current number of requests being processed by the worker process.	Count
Active thread count	iis.W3SVCW3WP.ActiveThreadsCount	Number of threads actively processing requests in the worker process.	Count
Current file cache memory usage	iis.W3SVCW3WP.CurrentFileCacheMemoryUsage	Current number of bytes used by user-mode file cache.	Byte
Current files cached	iis.W3SVCW3WP.CurrentFilesCached	Current number of files whose contents are present in user-mode cache.	Count
Current metadata cached	iis.W3SVCW3WP.CurrentMetadataCached	Number of metadata information blocks currently present in user-mode cache.	Count
Current URIs cached	iis.W3SVCW3WP.CurrentURIsCached	URI information blocks currently in the user-mode cache.	Count
File cache misses per second	iis.W3SVCW3WP.FileCacheMissesPersec	Rate of unsuccessful lookups in file cache during last sample interval.	PerSecond
Maximum thread count	iis.W3SVCW3WP.MaximumThreadsCount	Maximum number of threads to which the thread pool can grow as needed.	Count
Metadata cache misses per second	iis.W3SVCW3WP.MetadataCacheMissesPersec	Rate of unsuccessful lookups in metadata cache during last sample interval.	PerSecond
Output cache current memory usage	iis.W3SVCW3WP.OutputCacheCurrentMemoryUsage	Current number of bytes used by output cache.	Byte
Output cache misses per second	iis.W3SVCW3WP.OutputCacheMissesPersec	Rate of unsuccessful lookups in output cache during last sample interval.	PerSecond
Requests per second	iis.W3SVCW3WP.RequestsPerSec	HTTP requests/sec being processed by the worker process.	PerSecond
Total threads	iis.W3SVCW3WP.TotalThreads	Total number of threads available to process requests in the worker process.	Count

Metric name	Metric key	Description	Unit
Active listener channels	iis.WASW3WP.ActiveListenerChannels	Number of currently active listener channels in the worker process.	Count
Active protocol handlers	iis.WASW3WP.ActiveProtocolHandlers	Number of currently active protocol handlers in the worker process.	Count
Health ping reply latency	iis.WASW3WP.HealthPingReplyLatency	Time, in 100 nanosecond increments, taken by worker process to reply to last health ping.	NanoSecond

Metric name	Metric key	Description	Unit
Byte total per second	iis.W3SVC_WebService.BytesTotalPersec	Bytes Total/sec is the sum of Bytes Sent/sec and Bytes Received/sec. This is the total rate of bytes transferred by the Web service.	Byte
Connection attempts per second	iis.W3SVC_WebService.ConnectionAttemptsPersec	The rate that connections to the Web service are being attempted.	PerSecond
Current anonymous users	iis.W3SVC_WebService.CurrentAnonymousUsers	The number of users who currently have an anonymous connection using the Web service.	Count
Current Connections	iis.current.connections.gauge	Current Connections is the current number of connections established with the Web service.	Count
Current non-anonymous users	iis.W3SVC_WebService.CurrentNonAnonymousUsers	The number of users who currently have a non-anonymous connection using the Web service.	Count