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在tomcat中查看JVM内存使用情况

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TOMCAT在运行过程中可以实时监控当前应用JVM的占用情况。TOMCAT本身带的应用manager可以进行服务器状态的监控。为了运行该程序,需要创建角色manager和对应的用户。

创建位置在conf/tomcat-users.xml中,内容如下所示:

<?xml version='1.0' encoding='utf-8'?>                                                                     
<tomcat-users>                                                                                                             
  <role rolename="tomcat"/>                                                                                        
  <role rolename="role1"/>                                                                                          
  <role rolename="manager"/>                                                                                   
  <role rolename="admin"/>                                                                                        
  <user username="tomcat" password="tomcat" roles="tomcat"/>                    
  <user username="both" password="tomcat" roles="tomcat,role1"/>              
  <user username="role1" password="tomcat" roles="role1"/>                          
  <user username="admin" password="tomcat" roles="admin,manager"/>   
</tomcat-users>                                                                                                           

创建了角色manager和用户admin/tomcat后就可以使用manager应用了。

在IE中键入httpp://localhost:8080,进入tomcat的主界面,然后选择左面的

<!---->
Administration     
下的Tomcat Manager,输入用户名和密码(admin/tomcat),就进入了manager的界面,

选择最右方的“Server Status”,便可以看到JVM的占用情况。

Free memory: 3.69 MB Total memory: 10.60 MB Max memory: 63.31 MB

Free memory:当前可用的内存;

Total memory:当前已经分配的JVM内存;

Max memory:当前允许分配的最大JVM内存;

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