Monitoring Dashboard Diagnostics Request Performance Page

Overview of the WLDF Architecture 2-5

2.5 Data Accessor

The Accessor provides access to all the data collected by WLDF, including log, event, and metric data. The Accessor interacts with the Archive to get historical data including logged event data and persisted metrics. When accessing data in a running server, a JMX-based access service is used. The Accessor provides for data lookup by type, by component, and by attribute. It permits time-based filtering and, in the case of events, filtering by severity, source and content. Tools may need to access data that was persisted by a currently inactive server. In this case, an offline Accessor is also provided. You can use it to export archived data to an XML file for later access. To use the Accessor in this way, you must use the WebLogic Scripting Tool WLST and must have physical access to the machine. The relationship of the Accessor to the Harvester and the Archive is shown in Figure 2–5 . Figure 2–5 Relationship of the Online and Offline Accessors to the Archive

2.6 Monitoring Dashboard and Request Performance Pages

WLDF provides two web pages from which diagnostic data is displayed visually: ■ Monitoring Dashboard ■ Diagnostics Request Performance Page

2.6.1 Monitoring Dashboard

The Monitoring Dashboard displays the current and historical operating state of WebLogic Server and hosted applications by providing visualizations of metric runtime MBean attributes, which surface some of the more critical run-time performance metrics and the change in those metrics over time. Historical operating state is represented by collected metrics that have been persisted into the Archive. To view collected metrics from the Archive, you must configure the Harvester to capture the data you want to monitor. The Monitoring Dashboard displays metric information in a series of views. A view is a collection of one or more charts that display metrics. The Monitoring Dashboard includes a predefined set of built-in views of available run-time metrics for all running WebLogic Server instances in the domain. Built-in views surface some of the more critical run-time WebLogic Server performance metrics and serve as examples of the Monitoring Dashboard’s graphic capabilities. 2-6 Configuring and Using the Diagnostics Framework for Oracle WebLogic Server Custom views are available only to the user who creates them. Custom views are automatically persisted and can be accessed again when you restart the Monitoring Dashboard sessions. For more information, see Chapter 15, Using the Monitoring Dashboard.

2.6.2 Diagnostics Request Performance Page

The Diagnostics Request Performance page of the WebLogic Server Administration Console shows real-time and historical views of method performance information that is captured through the WLDF instrumentation capabilities. To view request performance information, you must first configure WLDF instrumentation to make that data available. For more information, see Section 11.6, Creating Request Performance Data.

2.7 Diagnostic Image Capture