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Historical Performance Data

This section provides an overview of historical performance data and lists the pages used to analyze historical performance data.

Understanding Historical Performance Data

The system stores historical data from the moment a PMU finishes processing or an event occurs. When the archive program runs (PSPM_ARCHIVE), it either deletes the historical data or moves it to the archive tables.

Analyzing historical data can help you:

  • Identify trends.

    By comparing historical data, you can spot upward and downward performance trends.

  • Investigate past user complaints.

    For example, a user may complain that performance was slow during the previous week. You search historical performance data to find the PMUs that were generated by the user at a specific time a week ago.