SAP Basis Notes: Maintaining Collection and Reorganization Schemata (Expert Setting)

Use

Collection and reorganization schemata specify how long data assigned to this schema (see Assigning Collection and Reorganization Schemata to Performance Values) is to be stored in the Central Performance History (CPH) with which resolution.

Note

Use these expert settings if the normal screen for maintaining collection and reorganization schemata (see Maintaining Collection and Reorganization Schemata (Standard Setting)) does not meet your needs.

In the CPH, you can define in great detail which performance values you want to store from which systems in which resolution, and for how long. This number of configuration settings is, however, only necessary for a very small number of users, as SAP already delivers powerful standard schemata.

Prerequisites

The expert setting, in which you can set all parameters of the schemata as you wish, is described here. The prerequisites for using the expert setting are:

· Knowledge about the mechanisms of aggregation of data; you should understand the meaning of terms such as “Monthly aggregate with an hourly resolution”.

· Knowledge about the memory table of a Collection and Reorganization Schema, in which every row of the table determines the storage period of an aggregate with a certain resolution

Procedure

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1. To call the expert setting for editing collection and reorganization schemata, on the normal screen for maintaining collection and reorganization schemata, choose Edit ® Screen for extended configuration.

2. The Display Collection and Reorganization Schema screen appears. On this screen, you can make all settings for existing schemata and create any new schemata that you wish.

This graphic is explained in the accompanying text

Creating a Collection and Reorganization Schema

3. Choose the Create New Schema pushbutton ( This graphic is explained in the accompanying text ) and enter a name for the collection and reorganization schema in the Name field.

4. Depending on the temporal resolution in which performance values are to be collected in the CPH (usually Minutes, Quarter Hours, or Hours), enter in the Day Aggregate line the time in days for which you want to retain this data.

5. After this time has elapsed, the corresponding data is deleted. However, performance values should still exist after this (although as a different aggregate and/or with a different resolution. Enter the storage periods for the desired combinations of aggregate and resolution in the table.

Note

Note that the time unit of the storage periods is the unit of the corresponding aggregate in each case. This means that different units apply for the different rows of the table.

6. A collection and reorganization schema also includes the selection of the method with which performance data from remote systems reaches the CPH. In the Collection Method group box, choose Collection Method. For an explanation of the various methods, see Collecting and Reorganizing Performance Values.

7. Performance values are first stored in the local time zone in the monitoring segment. If necessary, you can convert these values to a different time zone either during the data collection or during the aggregation. This means that the workload that is created by changing the time zone is shifted to a less performance-critical part of the process. If you do not specify a time zone, the data is converted to the local time zone of the CPH system.

8. You can use a day schema and a calendar schema to specify whether particular hours or days should not be considered during the aggregation (see Creating and Editing a Day Schema and Creating and Editing a Calendar Schema). If you do not specify a day and calendar schema, all hours and days are used in the calculation of average values.

9. Save your entries.

Editing an Existing Collection and Reorganization Schema

10. In the Name group box, choose the selection help, and choose the collection and reorganization schema that you want to edit. Alternatively, you can also enter the desired schema in the input field and confirm the entry with the Enter key.

11. Switch to change mode by choosing the Display « Change ( This graphic is explained in the accompanying text ) pushbutton.