Technical data

5 Monitoring a WebLogic Server Domain
5-2 Administration Guide
n Tables of data about all entities of a particular type (such as the WebLogic
Servers table)
n Views of the domain log and of the local server logs. For information about log
messages, see Using Log Messages to Manage WebLogic Servers.
The Administration Console obtains information about domain resources from the
Administration Server. The Administration Server, in turn, is populated with
Management Beans (MBeans), based on Sun’s Java Management Extension (JMX)
standard, which provides the scheme for management access to domain resources.
The Administration Server contains both configuration MBeans, which control the
domain’s configuration, and run-time MBeans. Run-time MBeans provide a snapshot
of information about domain resources, such as JVM memory usage or the status of
WebLogic Servers. When a particular resource in the domain (such as a Web
application) is instantiated, an MBean instance is created which collects information
about that particular resource.
When you access a monitoring page for particular resources in the Administration
Console, the Administration Server performs a GET operation to retrieve the current
attribute values.
The following sections describe some of the monitoring pages that are useful for
managing a WebLogic Server domain. These pages have been selected simply to
illustrate the facilities provided by the Administration Console.
Monitoring Servers
The servers table and the monitoring tab pages for individual servers enable you to
monitor WebLogic Servers. The servers table provides a summary of the status of all
servers in your domain. If only a small subset of the log messages from the server are
forwarded to the domain log, accessing the local server log may be useful for
troubleshooting or researching events.
For more information about the log files and the logging subsystem, see Using Log
Messages to Manage WebLogic Servers.