Monitoring JRun Application Servers

eG Enterprise presents a hierarchical JRun monitoring model (see Figure 1), which executes diagnostic tests on the JRun server to extract a wide variety of performance heuristics. Using these statistics, administrators can guage the following:

Figure 1 : Layer model for a JRun application server

Each layer of the layer model is mapped to a series of tests that reports a wealth of performance metrics related to the appliance. These metrics can provide accurate answers for the following performance queries:

• Does the JRun server have adequate threads for handling its current and anticipated workload? Are too many requests waiting for threads?
• Is the server able to process requests quickly?
• Are there any requests for which processing has been delayed significantly?
• Have any requests been dropped by the server?
• Are too many requests awaiting processing?
• How quickly does the server respond to a request?
• Has sufficient memory been allocated to the server to serve requests effectively?
• Is the user activity on the server unusually high?