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Foglight for Java EE Technologies 5.9.7.5 - Application Servers User Guide

Monitoring Application Servers Monitoring Systems Monitoring Servers Monitoring Applications Monitoring Requests Managing Traces Using Object Tracking to Locate a Memory Leak Monitoring Methods Application Servers Monitor Views
JVM view Method Groups view Request Types view Entity EJBs view Message Driven EJBs view Stateful Session EJBs view Stateless Session EJBs view Deployed Applications view JSPs/Servlets components view Resource Adapters components view Web Applications components view Web Services components view .NET views JBoss Services views Oracle Services views Tomcat Services views WebLogic Services views WebSphere Services views JMX Administration dashboard JMX Explorer dashboard
Appendix: Regular Expressions

Monitoring Methods

The Methods tile on the Application Servers Monitor dashboard allows you to monitor specific named methods. From here you can review the invoked operations used by specific applications.
 
* 
NOTE: Method monitoring is only applicable to Foglight for Java EE Technologies.
Once your administrator has configured the named methods to monitor (see Collecting metrics on Java methods ), you can use the Methods view to investigate how often a named method is called and to monitor the results of those called methods. For example, you can use Named Methods to monitor specific methods that connect to external systems.
All calls to the defined methods are tracked. The information presented is independent of request sampling. The metrics capture the behavior of the methods invoked during a request.
You can also find information on the Java request types that invoked the named method. For example, the number of log ins, number of calls to external system, and so on.
The Methods view shows you detailed information about the named methods being monitored in your environment.
From this view, you can perform the following actions:
•
Monitor metrics associated with named methods.
•
Review the invoked operations used by specific applications.
•
Review charts that display metrics about the named methods.
•
Collect Single Traces (from the action panel General tab)
 
To view the named methods:
1
On the navigation panel, under Dashboards, click Application Servers > Monitor.
2
On the Application Servers Monitor dashboard, click the Methods tile.
Figure 35. The Application Servers Monitor dashboard with the Methods tile selected.
The Methods view displays a Request Types table and corresponding metric chart for the selected method. In the chart area, you can quickly review the Call Count, Execution Time and Exceptional Exit metrics for the selected method.
 
Table 22. Information contained in the Method Group table.
Data Item
Description
Name
Name of the method group.
Method group names at the top level are metrics at the domain level. Method Group names in the sub-items are at the server level.
Health
Health status of the method group.
From this link you can access a lists of outstanding Alarms and information on the changes made.
System
Name of the system the method is connected to.
From this link you can select servers, applications, and clusters in your infrastructure that the method is calling.
Calls
Total number of calls for the selected time period.
Execution Time (s)
Execution time, in seconds, for the current period, as well as the period average and the period total.
Exceptional Exits
Total number of exceptional exits for this method.
Exceptional Exit%
Percentage of invocations that exited in exception.
Requests
Number of requests that reference the selected method.

Collecting metrics on Java methods

The Methods view allows you to view metrics selectively collected on one or more Java methods. In order to collect data for the Methods view, you must specify the methods to be tracked in the agent instrumentation configuration. To define these methods you can specify the fully qualified class name, method name, and/or method arguments in the agent configuration profile.
 
* 
NOTE: It is strongly recommended that you make a backup of the default agent profile before editing.
NOTE: You must restart your instrumented application servers after editing the instrumentation configuration (agent/instrumentation.config) in order for the changes to take effect.
For example:
You can group overloaded methods together. In the example below, we are defining a method group which uses similar methods. Get Balance is displayed in the user interface and all the methods within that group are aggregated.
NamedMethods = {
"Get Balance": MethodList(
include "com.globex.Account.close()",
include "com.globex.Account.close(Ljava/lang/Integer;Z[B)I|)”,
include "com.globex.Account.close(Ljava/lang/String;Z[B)I)",
),
}
 
To define named methods:
1
On the navigation panel, under Dashboards, click Application Servers > Administration > Application Servers Administration.
2
On the Application Servers Administration dashboard, click Java Administration.
3
On the Java Administration page, click the Agent Configurations tab.
4
Create a backup of the configuration that you are about to edit.
a
Click the configuration name.
b
In the menu that opens, select Copy.
c
In the dialog box that opens, type a new name (for example, Default_Backup) in the New ID box.
 
* 
NOTE: You cannot use spaces in this name. Underscores, hyphens, periods, and alphanumeric characters are allowed.
d
Click Copy.
e
A message box opens. Click Close.
5
In the list of agent configurations, click the name of the configuration again.
6
Select Edit instrumentation settings.
The Configuration Category Editor opens.
7
Click the Named Methods tab.
8
Click Edit to the right of NamedMethods.
9
In the Settings Editor, click Add named method.
10
In the dialog box that opens, type the name of the named method
11
Click OK.
The Settings Editor refreshes and a table appears on the right.
12
Click Add. This adds a row to the method list table.
13
Click in the Name box and type the name of the method.
 
* 
TIP: To use a regular expression, click the Regex check box.
Figure 36. Type the name of the method in the Name box.
14
To add another method, repeat steps 11 and 12.
15
After adding all the methods, click OK.
Figure 37. The Settings Editor closes, and the named method appears in the list on the Named Methods tab of the Configuration Category Editor.
 
* 
IMPORTANT: These settings are valid only for FullDetail and ComponentDetail Instrumentation Levels. Changing the values will have no effect if the Instrumentation Level is BasicDetail or NoDetail. You can set the instrumentation level on the General page of the Configuration Category Editor for the agent instrumentation profile.
16
Click Save. The Configuration Category Editor closes.

Understanding the implications of using named methods

Although the NamedMethods MethodList accepts a broad package definition, it is not recommended that you define your NamedMethods this way. Excessive NamedMethod instrumentation may increase the load on the Foglight Management Server and overhead on the application server, so it is best to include only the methods that you are interested in. In order to guard against excessive instrumentation, there is a limit on the number of NamedMethods that can be instrumented. Once this limit has been reached, no more methods are instrumented to display in the Application Servers Monitor > Methods view. A warning is logged for each method that is configured to be instrumented but is not instrumented when exceeding the allowed number of NamedMethods.
If you have configured too many NamedMethods and you are getting this warning, the first course of action is to modify your NamedMethods MethodList to only include the methods you are interested in or to be more specific in your named method definitions. If you have done that and are still getting warnings, you may increase the limit by editing the MaxNumberOfMethodsTracked property in the agent instrumentation profile. The default value is 100.
 
* 
TIP: You can set the MaxNumberOfMethodsTracked on the Named Methods tab of the Configuration Category Editor.
For more information about editing agent instrumentation configurations, see the Foglight for Java EE Technologies Installation Guide.
 

Application Servers Monitor Views

The Application Servers Monitor dashboard provides a high-level overview of your monitored environment that is divided into five main views: Systems, Servers, Applications, Requests, and Methods. You can drill-down from any of these main views for more information about a selected component.
Hover your mouse over any text on the dashboard to determine whether it is a link, and click any link to open a popup or view.
To drill down to a view:
1
On the Application Servers Monitor dashboard, click a tile (Systems, Servers, Applications, Requests, or Methods).
2
In the selected tile view, click the name of the item you want to investigate.
Figure 38. For example: click the Servers tile, select a WebLogic server, and click the Web Applications link under Applications Components. A popup appears, listing the health status of the selected component.
3
In the upper left corner of the popup, click Web Applications to open the drilldown view in the display area.
 
* 
TIP: Use the breadcrumb trail at the top of any drilldown view to return to the Application Servers Monitor dashboard.
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