Document the magic JVM flag to reduce CPU contention etc
tallpsmith opened this issue · 2 comments
tallpsmith commented
This issue stems from the discovery many moons ago that for older Java+Linux Kernal combinations some of the Thread CPU metric collections were INSANELY SLOW.
To work around this, an evilly hidden JVM option was discovered: -XX:+UseLinuxPosixThreadCPUClocks
Which when active, drastically improved performance.
myllynen commented
Since the option is enabled by default on OpenJDK 1.7+ perhaps this issue can be closed?