Key reports

Performance Predictor generates hundreds of pages of reports for each hourly baseline and "What-If" scenario. These reports provide information you can use to track specific problems and compare possible solutions.

However, you might never need to review the entire body of information. A daily review of key summary reports is often sufficient to ensure the health of your z / OS environment.

If you want a quick overview of your environment's performance, first review the Daily Health Check Summary report (see Viewing-the-Daily-Health-Check-Summary-report). This report is extremely useful if your z /OS environment is running in goal mode. You can see immediately when and where your system has performance problems relative to the goals you have set.

If you want to look deeper, pick one or more hours of peak system usage (for example, the hours when large batch jobs run), and use the Performance Predictor portal to scan the following reports for the selected time period or use the Performance Explorer to create customized reports, where you can selectively choose the details you want to see:

  • Top Workload Analysis Report
  • Top Coupling Facility Analysis Report
  • Top Tape Analysis Report
  • Top Disk Analysis Report
  • Top System Analysis Report
  • Top Application Analysis Report
  • Top Storage System Analysis Report
  • Top Storage Group Analysis Report
  • Application Performance Details Report 
  • Application Configuration Report

If these reports show that the z /OS environment is meeting the service level objectives and you do not need to fine tune it, no further action is required.

However, if you see something in the reports that concerns you, or you have other reasons to believe that you are not getting peak performance, you might want to look more closely at the hourly baseline reports. These reports contain hyperlinks where you can drill down to the desired level of information.

Links are also available for you to navigate to other tools to view the baseline information with Performance Explorer, Graph Explorer, or the Graphlet Explorer. In Scenario Explorer, you can create scenarios to solve any problems you have found.

After creating such scenarios, you can publish reports for them to the web, where others in your organization can view them (see Publishing-reports-to-Performance-Predictor-portal).

Note

Wherever utilization is saturated in a scenario, the scenario report specifies how much extra capacity is necessary to bring utilization below the saturation level. 

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