答复: HotSpot VM 内存堆的两个Survivor区
把先前在论坛回复的一些帖打捞进来。这篇的原帖是：HotSpot VM 内存堆的两个Survivor区
下面是回复内容，带补充。
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curl 'http://hg.openjdk.java.net/jdk6/jdk6/hotspot/raw-file/tip/src/share/vm/runtime/globals.hpp' | grep -A 2 -E 'Use.*GC,'
product(bool, UseSerialGC, false, \ "Use the serial garbage collector") \ \ product(bool, UseG1GC, false, \ "Use the Garbage-First garbage collector") \ \ product(bool, UseParallelGC, false, \ "Use the Parallel Scavenge garbage collector") \ \ product(bool, UseParallelOldGC, false, \ "Use the Parallel Old garbage collector") \ \-- product(bool, UseMaximumCompactionOnSystemGC, true, \ "In the Parallel Old garbage collector maximum compaction for " \ "a system GC") \-- product(bool, UseConcMarkSweepGC, false, \ "Use Concurrent Mark-Sweep GC in the old generation") \ \-- develop(bool, UseAsyncConcMarkSweepGC, true, \ "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ \-- product(bool, UseParNewGC, false, \ "Use parallel threads in the new generation.") \ \-- product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ "Use statistics from System.GC for adaptive size policy") \ \
