play framework 时常出现 Oops: OutOfMemoryError

Question

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Oops: OutOfMemoryError
An unexpected error occured caused by exception OutOfMemoryError: PermGen space

play.exceptions.UnexpectedException: Unexpected Error
 at play.Invoker$Invocation.onException(Invoker.java:244)
 at play.Invoker$Invocation.run(Invoker.java:286)
 at Invocation.HTTP Request(Play!)
Caused by: java.lang.OutOfMemoryError: PermGen space
 at java.lang.ClassLoader.defineClass1(Native Method)
 at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
 at play.classloading.ApplicationClassloader.loadApplicationClass(ApplicationClassloader.java:152)
 at play.classloading.ApplicationClassloader.getAllClasses(ApplicationClassloader.java:429)
 at play.Play.start(Play.java:505)
 at play.Play.detectChanges(Play.java:629)
 at play.Invoker$Invocation.init(Invoker.java:198)
 ... 1 more

Answer 1

clasd 实例频繁的热加载的话，就必须用虚拟机参数把永久区加大

Answer 2

play大量用到静态方法，值设大一点吧。