Another powerful tool at the disposal of developers and system administrators alike is the use of performance counters. The Performance Monitor tool (found under Administrative Tools, Performance) displays a value-over-time graph of any number of system counters that provide valuable analysis information. Consult your Windows administration guide for more information on system-level performance counters.
ASP.NET 2.0 provides the following performance counters that can be monitored from the Performance Monitor tool. These counters are described in Table 31.3.
Table 31.3. ASP.NET 2.0 Performance Counters
Counter | Description |
|---|
Application Restarts | Number of application restarts since server startup. |
Application Running | Number of running ASP.NET applications. |
Requests Disconnected | Number of disconnected requests due to a connection failure. |
Requests Queued | Number of requests queued and waiting for processing. |
Requests Rejected | Number of requests denied due to insufficient resources on the server. |
Request Wait Time | Wait time (in milliseconds) of most recent request. |
Session State Server | Total number of connections to the session state |
Connections Total | server on this machine. |
Session SQL Server | Total number of connections made to an out-of- |
Connections Total | process SQL Server for state management. |
State Server Sessions | Number of abandoned state server sessions. |
Abandoned | |
State Server Sessions Active | Number of currently active state server sessions. |
State Server Sessions | Total number of timed-out sessions since server startup. |
Timed Out | |
State Server Sessions Total | Total number of state server sessions: sum of active, abandoned, and timed out. |
Worker Process Restarts | Total number of times ASP.NET worker processes have restarted. |
Worker Process Running | Number of active worker processes. |
Application-Specific Counters | |
Anonymous Requests | Number of unauthenticated requests. |
Anonymous Requests/Second | Average number of anonymous requests/second. |
Cache Total Entries | Total number of entries within the cache including ASP.NET entries and programmatically (API) created entries. |
Cache Total Hits | Total number of cache hits. |
Cache Total Misses | Total number of cache misses. |
Cache Total Hit Ratio | Cache hit ratio (ratio of hit to miss). |
Cache Total Turnover Rate | Total turnover rate for cache. Turnover rate is number of additions and removals per second. High turnover rate indicates poor cache usage. |
Cache API Entries | Number of API-created (non-ASP.NET framework) cache entries. |
Cache API Hit Ratio | Hit ratio for API-created cache entries. |
Cache API Turnover Rate | Turnover rate for API-created cache entries. |
Compilations Total | Total number of compilations performed since process start. |
Debugging Requests | Count of total requests during Debugging mode. |
Errors During Preprocessing | Total number of preprocessing errors. |
Errors During Compilation | Total number of compilation errors. |
Errors Unhandled During | Total number of unhandled exceptions. Nothing is counted when |
Execution | a default error page is defined. |
Errors Unhandled During | Average number of unhandled exceptions/second. Obviously, this |
Execution/second | number should remain low. |
Errors Total | Total number of all types of errors. |
Errors Total/Second | Total number of all error types per second. |
Output Cache Entries | Number of entries in the output cache. |
Output Cache Hits | Total number of output cache hits. |
Output Cache Misses | Total number of output cache misses. |
Output Cache Hit Ratio | Ratio of output cache hits to misses. |
Output Cache Turnover Rate | Turnover rate (sum of additions and deletions). |
Pipeline Instance Count | Number of active request pipelines. |
Request Bytes In Total | Total size in bytes of all requests. |
Request Bytes Out Total | Total size in bytes of all responses to requests. |
Requests Executing | Total number of requests currently executing. |
Requests Failed | Total number of failed requests. |
Requests Not Found | Total number of 404 or 414 errors. |
Requests Not Authorized | Total number of authorization (401) errors. |
Requests Succeeded | Total number of successful requests (HTTP code 200). |
Requests Timed Out | Total number of requests timed out (HTTP code 500). |
Requests Total | Total number of all requests of all types. |
Requests/sec | Average number of requests per second. |
Sessions Active | Total number of active sessions. Only includes in-process session states. |
Sessions Abandoned | Total number of abandoned sessions (in-process only). |
Sessions Timed Out | Total number of timed-out sessions (in-process only). |
Sessions Total | Total number of sessions of all types (in-process only). |
transactions Aborted | Total number of all aborted transactions within all ASP.NET applications in this process. |
TRansactions Committed | Total number of committed transactions. |
transactions Pending | Total number of open transactions waiting to commit or roll back. |
TRansactions Total | Total number of transactions of all types. |
TRansactions/sec | Average number of transactions per second. |
