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Foglight Agent Manager 5.9.3 - Foglight Agent Manager Guide

Configuring the embedded Agent Manager Installing external Agent Managers
Understanding how the Agent Manager communicates with the Management Server Deploying the Agent Manager cartridge Downloading the Agent Manager installer Installing the Agent Manager Starting or stopping the Agent Manager process Frequently asked questions
Configuring the Agent Manager Advanced system configuration and troubleshooting
Configuring Windows Management Instrumentation (WMI) Configuring Windows Remote Management (WinRM) UNIX- and Linux-specific configuration
Monitoring the Agent Manager performance Deploying the Agent Manager to large-scale environments

Preventing Agent Manager core dumps on Linux

Installing and running the Agent Manager on a Linux® machine with several interfaces can result in a core dump with the following console output:

*** glibc detected ***
...
malloc(): memory corruption:
...
Java_java_net_NetworkInterface_getAll+0x8c

This error is related to a known JavaTM 6 issue, JDK-7078386. This issue is resolved in Java 7. For more information about JDK-7078386, you can visit http://bugs.java.com/bugdatabase/view_bug.do?bug_id=7078386.

To prevent an Agent Manager core dump on a Linux machine:
1
Before installing the Agent Manager, install Java 7 update 45 on the machine where you plan to install the Agent Manager.
2
On this machine, install the Agent Manager, and navigate to the following directory: <fglam_home>/state/default/config.
3
In this directory, locate and open the vm.config file for editing.
4
In the vm.config file, search for the java.vm property, and edit its value to point to the new JDK 7 installation.
5
Save your changes to the vm.config file, and close it.
6
Start up the Agent Manager.

 

Monitoring the Agent Manager performance

Foglight® uses the Agent Manager to communicate with monitored hosts. The embedded Agent Manager can be used to monitor the host on which the Management Server is installed. Your monitoring environment typically includes a number of Agent Manager instances installed on different hosts.

•
Investigating Agent Manager diagnostics

Investigating Agent Manager diagnostics

You monitor the state of your Agent Manager instances and the related Management Server adapters using the FglAM Performance Overview dashboard. Use this dashboard to better find out how these components perform over time and to look for any indicators that may predict potential bottlenecks. For example, an unusually high number of pending messages in the queue indicates a potential performance bottleneck. To access this dashboard, from the navigation panel, choose Dashboards > Management Server > Diagnostic > Agent Manager.

Figure 1. FglAM Performance Overview dashboard

The information appearing on this dashboard appears on two major tabs, Adapter Details and Client Details, each consisting of several sub-tabs. For more information about the data appearing on this tab, see the following topics:

•
Exploring the Adapter Details tab
•
Exploring the Client Details tab

Exploring the Adapter Details tab

The Adapter Details tab allows you to investigate the performance of the Management Server adapters that communicate with the connected hosts. Use it to see the overall processing rates and to estimate your system’s load. Higher processing rates may lead to decreased performance, requiring further investigation.

For more information about the data appearing on this tab, see the following topics:

•
Message Processing tab
•
XML Serialization tab
•
Servlets tab
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