Specifies the number of low-priority background threads that are attached to assist the mutator threads in concurrent mark operations. This option maps directly to the HotSpot
The default value is
Note: This value is reported in the header section of a verbose GC log with the entry
<attribute name="gcthreads Concurrent Mark" value="1" />.
This option is not supported with the balanced GC policy (
-Xgcpolicy:balanced) or metronome GC policy (