This Oracle HotSpot option specifies the number of threads that are used during parallel operations of the default garbage collector. This option is recognized by Eclipse OpenJ9™ and provided for compatibility.
This option enforces the thread count and cannot be used with the
-XX:+AdaptiveGCThreading option, which enables the garbage collector to adjust the number of parallel threads based on heuristics. If you want to use
-XX:ParallelGCMaxThreads instead of
<number> is the number of threads that are used for parallel operations.
Within OpenJ9 this option is directly mapped to