Web Proxy Service Test

This test monitors the Web Proxy service. Requests from Web Proxy clients are directed to the Web Proxy service on the ISA server to determine if access is allowed.

This test is disabled by default. To enable the test, go to the enable / disable tests page using the menu sequence : Agents -> Tests -> Enable/Disable, pick the ISA Proxy server as the desired Component type, set Performance as the Test type, choose the test from the disabled tests list, and click on the < button to move the test to the ENABLED TESTS list. Finally, click the Update button.

Target of the test : An ISA Proxy server 2004

Agent deploying the test : An internal agent

Outputs of the test : One set of results for every ISA Proxy server that is being monitored

Configurable parameters for the test
Parameters	Description
Test period	This indicates how often should the test be executed.
Host	The host for which the test is to be configured.
Port	Refers to the port used by the ISA Proxy server.

Measurements made by the test
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	Indicates 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	Indicates 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.
Active threads	Indicates 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	Indicates the number of kilobytes read by the data-pump per second.	KB/Sec	A consistent decrease in the value of this measure may indicate a delay in servicing firewall requests.
Write rate	Indicates 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	Indicates the number of threads in the thread pool	Number
Thread pool sessions	Indicates the number of sessions being actively serviced by thread pool threads.	Number
Thread pool failures	Indicates the number of requests rejected because the thread pool was full.	Number