update jvm

.idea/workspace.xml

@@ -704,10 +704,10 @@
       <screen x="0" y="0" width="1440" height="900" />
     </state>
     <state x="533" y="166" key="#com.intellij.ide.util.MemberChooser/0.0.1440.900@0.0.1440.900" timestamp="1578548165321" />
-    <state x="303" y="50" key="CommitChangelistDialog2" timestamp="1585657778436">
+    <state x="303" y="50" key="CommitChangelistDialog2" timestamp="1585658308652">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
-    <state x="303" y="50" key="CommitChangelistDialog2/0.0.1440.900@0.0.1440.900" timestamp="1585657778436" />
+    <state x="303" y="50" key="CommitChangelistDialog2/0.0.1440.900@0.0.1440.900" timestamp="1585658308652" />
     <state x="143" y="78" width="1152" height="720" key="DiffContextDialog" timestamp="1585657797990">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
@@ -766,10 +766,10 @@
       <screen x="0" y="0" width="1440" height="900" />
     </state>
     <state x="474" y="173" key="VCS.ChangeListViewerDialog/0.0.1440.900@0.0.1440.900" timestamp="1585577172815" />
-    <state x="320" y="190" key="Vcs.Push.Dialog.v2" timestamp="1585657828369">
+    <state x="320" y="190" key="Vcs.Push.Dialog.v2" timestamp="1585658310380">
       <screen x="0" y="0" width="1440" height="900" />
     </state>
-    <state x="320" y="190" key="Vcs.Push.Dialog.v2/0.0.1440.900@0.0.1440.900" timestamp="1585657828369" />
+    <state x="320" y="190" key="Vcs.Push.Dialog.v2/0.0.1440.900@0.0.1440.900" timestamp="1585658310380" />
     <state x="100" y="100" width="1240" height="700" key="com.intellij.history.integration.ui.views.DirectoryHistoryDialog" timestamp="1581744794182">
       <screen x="0" y="23" width="1440" height="797" />
     </state>

Rocket.md

@@ -305,6 +305,7 @@ HotSpot JVM把年轻代分为了三部分：1个Eden区和2个Survivor区（分
 ### JVM性能监控
 
 1. JDK的命令行工具
+
     * jps(虚拟机进程状况工具)：jps可以列出正在运行的虚拟机进程，并显示虚拟机执行主类(Main Class,main()函数所在的类)名称 以及这些进程的本地虚拟机唯一ID(Local Virtual Machine Identifier,LVMID)。
     * jstat(虚拟机统计信息监视工具)：jstat是用于监视虚拟机各种运行状态信息的命令行工 具。它可以显示本地或者远程虚拟机进程中的类装载、内存、垃圾收集、JIT编译等运行数据。
     * jinfo(Java配置信息工具)：jinfo的作用是实时地查看和调整虚拟机各项参数。