Performance data files

You can generate database files from the collection objects maintained by Collection Services. Use this topic to find the names, descriptions and attributes of these database files.

Performance data is a set of information about the operation of a system (or network of systems) that can be used to understand response time and throughput. You can use performance data to make adjustments to programs, system attributes, and operations. These adjustments can improve response times and throughputs. Adjustments can also help you to predict the effects of certain changes to the system, operation, or program.

Collection Services collects performance data into a management collection object (*MGTCOL). The Create Performance Data (CRTPFRDTA) command processes data from that collection object and stores the result into performance database files.

Additional field information, such as number of bytes and buffer position, is available by using the Display File Field Description (DSPFFD) command. For example...

DSPFFD file(QSYS/QAPMCONF)

• Performance data files: File abbreviations
  The performance data files use abbreviations in the field and byte data tables.

• Performance data files: Collection Services system category and file relationships
  When you collect performance data using Collection Services, the data is stored in a management collection (*MGTCOL) object.

• Performance data files: Task type extender
  A task type extender identifies the area of functional support provided by the task.

• Performance database files: Field data for trace database files
  Trace data is collected only when you choose to do so. You can find the QAPMDMPT file in the trace data files.

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