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This HotSpot option is recognized by OpenJ9 for compatibility, and you can use it as an alias for -Xdump:directory=<path>.

This option sets the directory for all VM dumps including heap dumps, Java™ dumps, and system dumps.



where <path> is the directory to which all dump types are written. This directory path is prefixed to the path of all non-absolute dump file names, including the file names for the default dump agents.