12. Java常见问题排查
java.lang.OutOfMemoryError
◦ GC overhead limit exceeded
◦ Java Heap Space
◦ Unable to create new native thread
◦ PermGen Space
◦ Direct buffer memory
◦ Map failed
◦ request {} bytes for {}. Out of swap space?
13. Java常见问题排查
java.lang.OutOfMemoryError
◦ GC overhead limit exceeded/Java Heap
Space
出现这个现象的原因
Java Heap分配不出需要的内存了
Perm Gen Eden Survivor Survivor OldGen
Java Heap(-Xms -Xmx)
-XX:PermSize
-XX:MaxPermSize NewGen
(-Xmn -XX:SurvivorRatio)