You can use the Monitor view of the Admin Center Explore tool to track used heap memory, loaded classes, active Java™ virtual machine (JVM) threads, central processing unit (CPU) usage, and other metrics
depending on the resource. The Monitor view shows the metrics graphically in charts. You can
customize the Monitor view by selecting the charts to show or hide.
Procedure
- Open the Monitor view on a server or application.
- From the Toolbox, select
.
- Select a server or application to monitor.
- To monitor a server, select the Servers panel and then a server.
- To monitor an application, select the Applications panel and then an
application instance. Or, to monitor an application on a server, select the
Servers panel, a server, and then an application.
- Select
Monitor on the vertical navigation bar.
When first displayed, the Monitor view shows the following charts:
- Used Heap Memory
- The Used Heap Memory chart shows the heap memory used by the server in megabytes (MB) every two
seconds. The chart also shows the used, committed and maximum megabytes.
- Loaded Classes
- The Loaded Classes chart shows the number of classes loaded every two seconds. The chart also
shows the number of loaded and unloaded classes, as well as the total number of classes.
- Active JVM Threads
- The Active JVM Threads chart shows the number of JVM threads every two seconds. The chart also
shows the number of live, total, and peak threads.
- CPU Usage
- The CPU Usage chart shows the percentage of CPU used every two seconds.
If a server has the monitor-1.0 feature enabled, the Monitor view also has other
charts, depending on the resource:
- Active Sessions
- Active Liberty Threads
- Average Response Time
- Average Wait Time
- Request Count
- Used
Connections
The charts available if a server enables the monitor-1.0
feature have additional configuration options. For example, charts for web applications with
multiple servlets, servers with active sessions, or servers with data sources display a drop-down
list from which you can select resources to show in the chart.
Select
, the resources to show in the chart, and then Save.
- Show or hide charts.
Select
, the charts to show or hide, and then Save. The Monitor view shows
or hides the selected charts, depending on whether the chart is shown or hidden when you make the
selection.
Your selections are saved for the resource and login user name. When the
user opens the Monitor view on the resource in the future, the same chart selections are shown.
- Show or hide chart legends.
If a chart has multiple grid lines, you can choose whether to show or hide the chart legend
depending on whether a legend is shown or hidden when you make a selection.
For example, to view a chart legend, select
for the chart and then Show legend.
To then hide the legend, select
for the chart and then Hide legend.
View chart data. In addition to viewing chart data graphically, you can view chart data in a table. Select
for the chart and then View chart data.