Results for the WebSphere Application Server performance tests

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After performing our WebSphere® Application Server performance tests, we charted and interpreted the results, and created recommendations.

The terms ETR and ITR are used throughout this section. These terms are defined as follows:
ETR
External Throughput Rate - the actual throughput measured during a test run. For our purposes, it is always expressed as the number of transactions per second measured during the test.
ITR
Internal Throughput Rate - the highest possible throughput that could be realized if the test was run at 100% CPU utilization. The ITR is always expressed as the number of transactions per second.
Note: When we state transactions per second we mean page elements per second, as reported by Trade.

The ETR and actual % CPU usage are used to formulate the ITR. The equation used was:

ITR = ETR/% CPU * 100%

We normalized the values for ETR and ITR such that the first ETR value in a sequence was set to 100%.

The tests we performed were: