Monitoring and troubleshooting tools in the JDK-01

When it comes to locating the system, we often need to understand and analyze the runtime state of the JVM. What should be the starting point? The answer is to start with the data. The data here include:

GC logs, exception stacks, thread snapshots (threaddump), heap dump snapshots (heapdump), and so on. The JDK is built with a wealth of virtual machine monitoring and analysis tools to use.

Can make our trouble shooting more with less.

Oracle Hotspot JDK Monitoring Analysis tool

Name	Role
JPs	The JVM process Status tool, which displays all the hotspot virtual machine processes running in the system
Jinfo	Configuration info for Java, displaying the virtual machine's config information
Jmap	Memory map for Java, generating a ram dump snapshot of a virtual machine (threaddump)
Jstack	Stack trace for Java, displaying a thread snapshot of a virtual machine
Jstat	JVM Statistics monitoring tool to display runtime state data for a hotspot virtual machine

Reference articles
Trouble Shooting Guide for Javase 6 with HotSpot VMS:

Http://www.oracle.com/technetwork/articles/javase/monitoring-141801.html

"Monitoring and managing Java SE 6 Platform Applications"

Http://www.oracle.com/technetwork/java/javase/tsg-vm-149989.pdf

Monitoring and troubleshooting tools in the JDK-01