G1 is not the default collector for Java 7. You have to enable it specifically with -XX:+UseG1GC
I believe the default collector for the server VM in 7 (and 8) is the parallel collector, equivalent to specifying -XX:+UseParallelGC. Yes, you need to not select more than one collector on the JVM command line. No good can come of that. :-) I'm not sure how many production deploys of HBase use G1. I'm guessing greater than zero but with a preponderance of installs using CMS. On Thu, Aug 21, 2014 at 1:43 AM, yanivG <yaniv.yancov...@gmail.com> wrote: > Thanks for all your answer. > I have few questions tough: > 1. I saw that G1 is default for Java7. So did it worked by default? I am > using Java SUN 1.7_51. > 2. If I am changing to G!, should i remove the other GC options? > > XX:+UseConcMarkSweepGC -XX:+UseParNewGC > > > > > -- > View this message in context: > http://apache-hbase.679495.n3.nabble.com/GC-peaks-during-major-compaction-tp4062704p4063022.html > Sent from the HBase User mailing list archive at Nabble.com. > -- Best regards, - Andy Problems worthy of attack prove their worth by hitting back. - Piet Hein (via Tom White)
