Linux系统下基于JDK命令行工具的监控-jinfo

查看JVM参数的工具  jinfo 

[root@xtpt-cs-app ~]# jinfo -help
Usage:
    jinfo [option] 
        (to connect to running process)
    jinfo [option] 
        (to connect to a core file)
    jinfo [option] [server_id@]
        (to connect to remote debug server)

where  is one of:
    -flag          to print the value of the named VM flag
    -flag [+|-]    to enable or disable the named VM flag
    -flag = to set the named VM flag to the given value
    -flags               to print VM flags
    -sysprops            to print Java system properties
              to print both of the above
    -h | -help           to print this help message

 

• no option 输出全部的参数和系统属性
• -flag name 输出对应名称的参数
• -flag [+|-]name 开启或者关闭对应名称的参数
• -flag name=value 设定对应名称的参数
• -flags 输出全部的参数
• -sysprops 输出系统属性

比如说查看某个VM参数变量值

[root@xtpt-cs-app ~]# jinfo -flag ThreadStackSize 23678
-XX:ThreadStackSize=512

XX:ThreadStackSize  每个线程堆栈的大小，默认值1024K，当发生网络密集实践时建议优化该参数，线上环境大小为 512K