IBM User Guide for Java V7 on Windows > Reference > Command-line options > JVM command-line options

-Xlog

Enables message logging.

-Xlog[:help]|[:<option>]

Optional parameters are:

• help - details the options available
• error - turns on logging for all JVM error messages (default).
• vital - turns on logging for selected information messages JVMDUMP006I, JVMDUMP032I, and JVMDUMP033I, which provide valuable additional information about dumps produced by the JVM (default).
• info - turns on logging for all JVM information messages
• warn - turns on logging for all JVM warning messages
• config - turns on logging for all JVM configuration messages
• all - turns on logging for all JVM messages
• none - turns off logging for all JVM messages

Note: Changes made to message logging using the -Xlog option do not affect messages written to the standard error stream (stderr). The options all, none and help must be used on their own and cannot be combined. However, the other options can be grouped. For example, to include error, vital and warning messages use -Xlog:error,vital,warn. For message details see Messages.

Parent: JVM command-line options

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