默认情况下GC在服务器上回收中断时间太长.

-XX:+UseConcMarkSweepGC \

-XX:+CMSIncrementalMode \

-XX:+CMSIncrementalPacing \

-XX:CMSIncrementalDutyCycleMin=0 \

-XX:+CMSIncrementalDutyCycle=10 \

-XX:+PrintGCDetails \

-XX:+PrintGCTimeStamps \

-XX:-TraceClassUnloading

http://www.oracle.com/technetwork/java/gc-tuning-5-138395.html#0.0.0.%20Total%20Heap|outline

http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html