JAVA 官网诊断及调优文档

  JVM格式规范

      https://docs.oracle.com/javase/specs/index.html

诊断工具：

　　http://docs.oracle.com/javase/8/docs/technotes/guides/troubleshoot/

       https://docs.oracle.com/javase/7/docs/technotes/tools/share/jstat.html

调优参数

　　http://docs.oracle.com/javase/8/docs/technotes/guides/vm/gctuning/

jvm

        http://docs.oracle.com/javase/8/docs/technotes/guides/vm/index.html

        http://docs.oracle.com/javase/8/docs/technotes/tools/unix/java.html