Available IIS Performance Measures

Performance Measures on IIS 6.0

Measures can be divided into several groups according to perfmon objects.

Web Service Measures

Web Service(_Total)\Bytes Received/sec
Rate of total bytes transferred by service (received)
Web Service(_Total)\Bytes Sent/sec
Rate of total bytes transferred by service (sent)
Web Service(_Total)\Bytes Total/sec
Rate of total bytes transferred by service (sum of bytes sent and received)
Web Service(_Total)\Current Connections
Current number of connections to the service
Web Service(_Total)\Get Requests/sec
Total number of HTTP GET requests received by WWW service
Web Service(_Total)\Post Requests/sec
Number of HTTP requests using POST method

Web Service Cache Measures

Web Service Cache(_Total)\Current Files Cached
Current number of files whose content is in the user-mode cache
Web Service Cache(_Total)\Current Metadata Cached
Current number of metadata information blocks currently in the user-mode cache.
Web Service Cache(_Total)\Current URIs Cached
URI information blocks currently in the user-mode cache
Web Service Cache(_Total)\File Cache Hits %
The ratio of user-mode file cache hits to total cache requests (since service startup). Note: This value might be low if the Kernel URI cache hits percentage is high.
Web Service Cache(_Total)\Metadata Cache Hits
The ratio of user-mode metadata cache hits to total cache requests (since service startup)
Web Service Cache(_Total)\URI Cache Hits %
The ratio of user-mode URI Cache Hits to total cache requests (since service startup)
Web Service Cache(_Total)\Kernel:URI Cache Hits %
Applies to static unauthenticated content and dynamic content that is marked as cacheable

Performance Measures on IIS 7.0, 7.5

All IIS 6.0 measures are available for IIS 7.0/7.5, but in IIS7 there are additional performance counters that give you insight into worker processes level at runtime.

Web Service Measures - Same as IIS 6.0.

Web Service Cache Measures - Same as IIS 6.0.

W3SVC_W3WP Cache Measures

W3SVC_W3WP(_Total)\Requests / Sec
HTTP requests/sec being processed by the worker process
W3SVC_W3WP(_Total)\Active Requests
Current number of requests being processed by the worker process
W3SVC_W3WP(_Total)\Active Threads Count
Number of threads actively processing requests in the worker process
W3SVC_W3WP(_Total)\Current File Cache Memory Usage
Current number of bytes used by user-mode file cache
W3SVC_W3WP(_Total)\Current Files Cached
Current number of files whose contents are present in user-mode cache
W3SVC_W3WP(_Total)\Current URIs Cached
URI information blocks currently in the user-mode cache
W3SVC_W3WP(_Total)\Current Metadata Cached
Number of metadata information blocks currently present in user-mode cache
W3SVC_W3WP(_Total)\Metadata Cache Hits
Total number of successful lookups in the user-mode metadata cache (since service startup)
W3SVC_W3WP(_Total)\Metadata Cache Misses
Total number of unsuccessful lookups in the user-mode metadata cache (since service startup)
W3SVC_W3WP(_Total)\Metadata Cache Flushes
Total number of user-mode metadata cache flushes (since service startup)
W3SVC_W3WP(_Total)\File Cache Hits / sec
Rate of successful lookups in file cache during last sample interval
W3SVC_W3WP(_Total)\File Cache Misses / sec
Rate of unsuccessful lookups in file cache during last sample interval
W3SVC_W3WP(_Total)\Metadata Cache Hits / sec
Rate of successful lookups in metadata cache during last sample interval
W3SVC_W3WP(_Total)\Metadata Cache Misses / sec
Rate of unsuccessful lookups in metadata cache during last sample interval
W3SVC_W3WP(_Total)\Uri Cache Hits / sec
Rate of successful lookups in URI cache during last sample interval
W3SVC_W3WP(_Total)\Uri Cache Misses / sec
Rate of unsuccessful lookups in URI cache during last sample interval