jprofiler find garbage collector algorithm

There are seven primary combinations of garbage collection algorithms for the Oracle JVM: -XX:+UseSerialGC (Copy+MarkSweepCompact) -XX:+UseG1GC (G1) -XX:+UseParallelGC -XX:+UseParallelOldGC -XX:+UseAdaptiveSizePolicy (PS Scavenge+PS MarkSweep+adaptive sizing) -XX:+UseParallelGC -XX:+UseParallelOldGC -XX:-UseAdaptiveSizePolicy (PS Scavenge+PS MarkSweep+no adaptive sizing) -XX:+UseParNewGC (ParNew+MarkSweepCompact) -XX:+UseConcMarkSweepGC -XX:+UseParNewGC (ParNew+ConcurrentMarkSweep) -XX:+UseConcMarkSweepGC -XX:-UseParNewGC (Copy+ConcurrentMarkSweep).īig List of 20 Common Bottlenecks (Page last updated May 2012, Added, Author Todd Hoff, Publisher highscalability).The 'train' (incremental) garbage collector is no longer available - it was in various JVMs as -Xincgc and -XX:+UseTrainGC and these flags are no longer useful.The parallel scavenge (PS Scavenge & PS MarkSweep) pair of collectors are effectively two different algorithms depending on whether you turn on or off the Adaptive Size Policy.The ConcurrentMarkSweep tries to do most of it's work in the background and minimize the pause time, but it also has a stop-the-world phase and can fail into the MarkSweepCompact which is fully stop-the-world. All of the Oracle JVM garbage collection algorithms except ConcurrentMarkSweep are stop-the-world - the stop is known as 'pause' time.

There are seven primary garbage collectors in the Oracle JVM: Copy (young), PS Scavenge (young), ParNew (young), MarkSweepCompact (old), PS MarkSweep (old), ConcurrentMarkSweep (old), G1 (young & old).Garbage Collectors Available In JDK 1.7.0_04 (Page last updated June 2012, Added, Author Jack Shirazi, Publisher ). The classic and most comprehensive book on tuning Java We can provide training courses to handle all your Java performance needs

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Jprofiler find garbage collector algorithm