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A servlet is a small Java program that runs within a web server. These servlets receive and respond to requests from web clients, usually over HTTP. Typically, these servlets run inside a servlet container that handles recurring multiple requests. The performance and reliability of any web based application depends upon how well the requests from web clients are managed. The TomcatServletTest enables administrators to assess the performance of servlets on the basis of their request handling capabilities.

Measurement	Description	Measurement Unit	Interpretation
Request_count	Indicates the number of requests handled by the servlet since the last measurement period	Number
Avg_processing_time	Indicates the average time taken by the servlet to process the requests since the last measurement period	Secs	If the value of this measure increases consistently, it indicates a gradual deterioration in the server performance.
Max_processing_time	Indicates the maximum time taken by the servlet to process the requests	Secs	If the time taken is significantly high, check for the errors or bottlenecks that interfere with the servlet's normal operation.
Min_processing_time	Indicates the minimum time taken by the servlet to process the current request	Secs	Minimum time taken to process the request is indicative of error free execution of service by the servlet.
Error_count	Indicates the errors encountered by the servlet, when a request is processed	Number	Ideally, the value for this measure should be 0. An error reported by this measure is a cause of concern; an analysis of the underlying reasons is hence necessitated.