IBM User Guide for Java V7 on Windows > Troubleshooting and support > Using diagnostic tools

Using system dumps and the dump viewer

The JVM can generate native system dumps, also known as core dumps, under configurable conditions. System dumps are typically quite large. Most tools used to analyze system dumps are also platform-specific; for example, windbg on Windows and gdb on Linux.

Dump agents are the primary method for controlling the generation of system dumps. See Using dump agents for more information. To maintain backwards compatibility, the JVM supports the use of environment variables for system dump triggering. See Dump agent environment variables for more information.

The dump viewer is a cross-platform tool to analyze system dumps at the JVM level rather than at the platform level.

• Overview of system dumps
  The JVM can produce system dumps in response to specific events. A system dump is a raw binary dump of the process memory when the dump agent is triggered by a failure or by an event for which a dump is requested.
• System dump defaults
  There are default agents for producing system dumps when using the JVM.
• Using the dump viewer
  System dumps are produced in a platform-specific binary format, typically as a raw memory image of the process that was running at the time the dump was initiated. The SDK dump viewer allows you to navigate around the dump, and obtain information in a readable form, with symbolic (source code) data where possible.

Parent: Using diagnostic tools

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