Does the JRockit JVM support thread priorities?
Yes, the JRockit JVM supports thread priorities on Windows (both IA32 and Itanium); It is not supported on Linux or Solaris. If you are running either IA32 or Itanium Windows, you can configure the JVM to stop ignoring priority change requests by passing the flag -XXusethreadpriorities. Despite being valid on all platforms, this flag is only meaningful on Windows. Priority change requests are ignored by default because, if they are improperly applied, applications will behave worse than before the change. If you set priority too high for a thread, it will consume too many resources, severely impacting performance. On the other hand, if you set it too low, priority inversion can result. Priority inversion means that high priority threads never get to run because they are waiting for a lock held by a low priority thread, which itself never gets the chance to release the lock because the high priority threads get all the CPU time. Because of this, setting and using priorities should be at
