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

Advanced control of dump agents

Options are available to give you more control over dump agent behavior.

• exec option
  The exec option is used by the tool dump agent to specify an external application to start.
• file option
  The file option is used by dump agents that write to a file.
• filter option
  Some JVM events occur thousands of times during the lifetime of an application. Dump agents can use filters and ranges to avoid excessive dumps being produced.
• opts option
  The Heapdump agent uses this option to specify the type of file to produce.
• priority option
  One event can generate multiple dumps. The agents that produce each dump run sequentially and their order is determined by the priority keyword set for each agent.
• range option
  You can start and stop dump agents on a particular occurrence of a JVM event by using the range suboption.
• request option
  Use the request option to ask the JVM to prepare the state before starting the dump agent.
• defaults option
  Each dump type has default options. To view the default options for a particular dump type, use -Xdump:<type>:defaults.

Parent: Using dump agents

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