5.1.2 Report types
There are two types of reports: realtime report and historical report.
- Realtime report
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Use this type of report to check the system status and problems at that time. You can specify settings so that a report is automatically updated at specified times and the latest data is displayed in the report. A realtime report collects performance data when the report is displayed, so realtime reports do not use the Store database.
- Historical report
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Create this type of report to analyze the trend of the system operating status from historical data until the present. Since past data must be retained, the historical report records performance data in the Store database. For details on how to record data into the Store database, see 4.1.1 Modifying the recording options for performance data.
Performance Management provides both normal and combination reports. A combination report combines multiple historical reports in the same graph. By registering reports that combine report definitions from multiple agents in a bookmark or combination bookmark, you can display reports and combination reports right away without needing to select each agent individually.
In addition to registered reports, combination bookmarks allow you to save reports created during a specific period in the past as reference reports for validating registered reports. Reports used as reference reports for validating registered reports are called baselines. By defining and managing multiple registered reports and baselines in a combination bookmark, you can display them on the same graph as a combination report. Such combination reports allow you to ascertain the operating status of the system in its entirety.
The following figure shows the relationship between the definition of a combination bookmark and a combination report.
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![[Figure]](GRAPHICS/ZU111043.GIF)
As shown in the figure, by creating a combination bookmark that contains report definitions for more than one agent, you can display multiple reports in one graph. For example, you can visually check the correlation between the number of transactions handled by the HTTP service and its response time by superimposing the two values in a combination report.
For details on how to display normal reports, see 5.7 Displaying reports. For details on how to display combination reports, see 5.8 Displaying combination reports.