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The most important terms related to the Central Performance History (CPH) are explained below:

  • In a Collection and Reorganization Schema, you define how long and with which granularity performance values are stored in the CPH. You do not use the schema to define which performance values are to be stored. This is done only when you Assign Collection and Reorganization Schemata to Performance Values.
  • Performance values should not be stored in the CPH for an unlimited period of time, as the size of the database would exceed all limitations. Instead, there is a regular aggregation, during which the performance values are deleted in one temporal granularity and stored in a coarser granularity.
  • You can specify rules for an aggregation of this type as to which hours of the day and which days should be taken into account. In this way, you can, for example, remove the hours of the night (using a day schema) or weekends and public holidays (using a calendar schema) from the calculation of an aggregate.
  • The performance values can be collected in the CPH with various methods. The basic possibilities are explained under Collection and Reorganization of Performance Values.
  • You use Central Performance History Reports to display the collected performance values. You can define in these reports which values are displayed for which period.

 Central Performance History of the Monitoring Architecture start page