Web Service Cache Counters for the WWW Service

Applies To: Windows Server 2003, Windows Server 2003 with SP1

The WWW service and FTP service do not share a common cache. Instead, the caches are split into two separate performance objects: one for FTP service and one for the WWW service. WWW service cache counters are designed to monitor server performance only; therefore, you cannot configure them to monitor individual sites.

For information about FTP service counters, see Internet Information Services Global Counters later in this appendix.

Table D.10 describes the File counters for the Web Service Cache performance object. These counters are new in IIS 6.0.

Table D.10 File Counters for the Web Service Cache Object

Counter	Description
Active Flushed Entries	The number of user-mode cache entries that have been flushed, though memory is still allocated for these entries. The allocated memory will be released after all current transfers complete.
Current File Cache Memory Usage	The number of bytes currently used for the user-mode file cache.
Current Files Cached	The number of files whose content is currently in the user-mode cache.
Total Files Cached	The number of files whose content has been added to the user-mode cache since the WWW service started.
File Cache Hits	The number of successful lookups in the user-mode file cache that have occurred since the WWW service started.
File Cache Hits %	The ratio of user-mode file cache hits to total cache requests that have been made since the WWW service started up.
File Cache Misses	The number of unsuccessful lookups in the user-mode file cache that have been made since the WWW service started.
File Cache Flushes	The number of files that have been removed from the user-mode cache since the WWW service started.
Maximum File Cache Memory Usage	The maximum number of bytes that have been used for the user-mode file cache since the WWW service started.
Total Flushed Files	The number of file handles that have been removed from the user-mode cache since the WWW service started.

Table D.11 describes the URI counters for the Web Service Cache performance object. These counters are new in IIS 6.0.

Table D.11 URI Counters for the Web Service Cache Object

Counter	Description
Current URIs Cached	The number of URI information blocks that are currently stored in the user-mode cache.
Total URIs Cached	The number of URI information blocks that have been added to the user-mode cache since the WWW service started.
URI Cache Hits	The number of successful lookups that have been made in the user-mode URI cache since the WWW service started.
URI Cache Misses	The number of unsuccessful lookups that have been made in the user-mode URI cache since the WWW service started.
URI Cache Hits %	The ratio of URI Cache Hits to total cache requests that have occurred since the WWW service started.
URI Cache Flushes	The total number of URI cache flushes that have occurred since the WWW service started.
Total Flushed URIs	The number of URI information blocks that have been removed from the user-mode cache since the WWW service started.

Table D.12 describes the Metadata counters for the Web Service Cache performance object. These counters are new in IIS 6.0.

Table D.12 Metadata Counters for the Web Service Cache Object

Counter	Description
Current Metadata Cached	The current number of metadata information blocks in the user-mode cache.
Total Metadata Cached	The number of metadata information blocks that have been added to the user-mode cache since the WWW service started.
Metadata Cache Hits	The number of successful lookups in the user-mode metadata cache that have occurred since the WWW service started.
Metadata Cache Misses	The number of unsuccessful lookups in the user-mode metadata cache that have occurred since the WWW service started.
Metadata Cache Hits %	The ratio of successful lookups to total metadata cache requests.
Metadata Cache Flushes	The number of user-mode metadata cache flushes that have occurred since the WWW service started.
Total Flushed Metadata	The number of metadata information blocks that have been removed from the user-mode cache since the WWW service started.

Table D.13 describes the Kernel counters for the Web Service Cache performance object. These counters are new in IIS 6.0.

Note

Kernel counters reflect all HTTP.sys activity, not just IIS activity.

Table D.13 Kernel Counters for the Web Service Cache Object

Counter	Description
Kernel: Current URIs Cached	The number of URI information blocks currently cached by the kernel.
Kernel: Total URIs Cached	The number of URI information blocks that have been added to the kernel URI cache since the WWW service started.
Kernel: URI Cache Hits	The number of successful lookups in the kernel URI cache that have occurred since the WWW service started.
Kernel: URI Cache Hits%	The ratio of Kernel: URI Cache Hits to total cache requests since the WWW service started.
Kernel: URI Cache Hits/sec	The average number of kernel URI cache hits that are being made per second.
Kernel URI Cache Misses	The number of unsuccessful lookups in the kernel URI cache that have occurred since the WWW service started.
Kernel: URI Cache Flushes	The number of kernel URI cache flushes that have occurred since the WWW service started.
Kernel: Total Flushed URIs	The number of URI information blocks that have been removed from the kernel cache since the WWW service started.