| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Cache_hit_ratio |
The percentage of successful web proxy client requests to the ISA Server
|
Percent
|
This measure is a good indicator of the effectiveness of the cache. A higher percentage indicates that a number of requests are being serviced from the cache. This in turn is indicative of faster responsiveness. A zero value indicates that caching is not enabled, and a low value may indicate a configuration problem.
|
| Current_users |
The number of clients that are currently running the web proxy service
|
Number
|
Monitoring this measure at both peak and off-peak times will enable users to assess the extent of server usage. This measure may also be useful if you need to temporarily stop ISA Server services.
|
| Read_rate |
The rate at which data bytes are received from Web Proxy clients
|
KB/Sec
|
A consistent decrease in the value of this measure may indicate a delay in servicing requests.
|
| Write_rate |
The rate at which data bytes are sent to Web Proxy clients
|
KB/Sec
|
A consistent decrease in the value of this measure may indicate a delay in servicing requests.
|
| Avg_requests_sec |
The average amount of time required by the ISA server to process a request
|
Secs/Request
|
This measure can be monitored at peak and off-peak times to receive a clear idea about how fast client requests are being serviced. A very high value of this measure might indicate that the ISA Server is having difficulty in handling all requests.
|
| Thread_pool_size |
The number of threads in the thread pool
|
Number
|
|
| Thread_pool_sessions |
The number of sessions being actively serviced by thread pool threads
|
Number
|
|
| Thread_pool_failure |
The number of requests rejected because the thread pool was full
|
Number
|
|