gtps3m0iSystem Performance and Measurement Reference

TPF System Performance Analysis

Now that you are familiar with the philosophy and mechanics of data collection and reduction, let us focus on how to interpret the reports generated by the data reduction programs. The data collectors and the reports associated with each follow.

All the key parameters are reported on a per second or per message basis. The per second approach provides the basis for analyzing the system load characteristics; that is, the utilization of system hardware components and program segments. The per message approach provides a base for predicting the message rate the system can handle at any utilization level.

Note:
When you compare numerical values in the performance reports found in this document, some values for access per second have been influenced by the skip factor. As reported in the Environment Summary Report, the skip factor that is used to generate some reports in this document decreases raw access numbers by a factor of 100. The skip factor can be specified separately for program or system collectors. The skip factor provides a system snapshot without disruptive production of huge amounts of data. Accesses per second are calculated by dividing the estimated number of events under a given skip factor by the total observation time. See the system performance and measurement information in TPF Operations for more information about the skip factor.