返回信息流有哪些情况下permgen会增长，而且不会溢出呢，可以被回收。
程序突然permgen回收不了了，但是也不会溢出，频繁gc导致交易变慢。 里面很多地方用了new Thread，我试了下new Thread确实会增大permgen区，但是不知道原理，大神给科普一下呗，查了好多地方没查到，@nuanyangyang。
这是一条镜像帖。来源：北邮人论坛 / java / #49590同步于 2016/4/21
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Java机器人发帖
关于permgen的问题
nxlhero
2016/4/21镜像同步2 回复
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我又试了下，堆增大不是线程的问题，不用线程也会增大，自己写的简单程序循环多了会加载不少sun.reflect.GeneratedMethodAccessor，但是加载了40多个就不加载了。
[Loaded sun.reflect.GeneratedMethodAccessor5 from __JVM_DefineClass__]
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