dashboard

当前系统的实时数据面板，按 ctrl+c 退出。

当运行在Ali-tomcat时，会显示当前tomcat的实时信息，如HTTP请求的qps, rt, 错误数, 线程池信息等等。

使用参考

  1. $ dashboard
  2. ID         NAME                              GROUP                  PRIORITY   STATE       %CPU       TIME       INTERRUPTED DAEMON
  3. 889        RMI TCP Connection(15)-30.10.166. RMI Runtime            9          RUNNABLE    48         0:5        false       true
  4. 1077       Timer-for-arthas-dashboard-0      system                 9          RUNNABLE    24         0:0        false       true
  5. 1074       as-selector-daemon                system                 9          RUNNABLE    12         0:0        false       true
  6. 284        JMX server connection timeout 284 RMI Runtime            9          TIMED_WAITI 8          0:3        false       true
  7. 16         Timer-1                           main                   5          TIMED_WAITI 5          0:9        false       true
  8. 47         Pandora pandora-qos-reporter Pool main                   5          TIMED_WAITI 0          0:0        false       true
  9. 48         JmonitorClient-CheckThread Pool [ main                   5          TIMED_WAITI 0          0:0        false       true
  10. 49         JmonitorClient-HeartBeat Pool [Th main                   5          TIMED_WAITI 0          0:0        false       true
  11. 50         JmonitorClient-ReaderThread Pool  main                   5          TIMED_WAITI 0          0:0        false       true
  12. 957        RMI TCP Connection(16)-30.10.166. RMI Runtime            9          RUNNABLE    0          0:2        false       true
  13. 51         JmonitorClient-WriterThread Pool  main                   5          TIMED_WAITI 0          0:0        false       true
  14. 52         ContainerBackgroundProcessor[Stan main                   5          TIMED_WAITI 0          0:0        false       true
  15. 53         http-bio-8080-Acceptor-0          main                   5          RUNNABLE    0          0:2        false       true
  16. 54         http-bio-8080-AsyncTimeout        main                   5          TIMED_WAITI 0          0:0        false       true
  17. 11         GC Daemon                         system                 2          TIMED_WAITI 0          0:0        false       true
  18. Memory                       used      total     max      usage     GC
  19. heap                         59M       223M      1820M    3.26%     gc.ps_scavenge.count              118
  20. ps_eden_space                14M       114M      668M     2.11%     gc.ps_scavenge.time(ms)           1890
  21. ps_survivor_space            6M        6M        6M       96.08%    gc.ps_marksweep.count             5
  22. ps_old_gen                   39M       103M      1365M    2.86%     gc.ps_marksweep.time(ms)          1140
  23. nonheap                      234M      240M      0M       97.46%
  24. code_cache                   46M       47M       240M     19.49%
  25. metaspace                    167M      172M      0M       97.36%
  26. Runtime                                                             Tomcat
  27. os.name                           Mac OS X                          connector                         http-bio-8080
  28. os.version                        10.10.5                           QPS                               0.00
  29. java.version                      1.8.0_60                          RT(ms)                            1.13
  30. java.home                                                           error/s                           0.00
  31.                                                                     received/s                        0B
  32. systemload.average                3.44                              sent/s                            0B
  33. processors                        4                                 threadpool                        http-bio-8080
  34. uptime                            16020s                            busy                              0

数据说明

  • ID: Java级别的线程ID，注意这个ID不能跟jstack中的nativeID一一对应
  • NAME: 线程名
  • GROUP: 线程组名
  • PRIORITY: 线程优先级, 1~10之间的数字，越大表示优先级越高
  • STATE: 线程的状态
  • CPU%: 线程消耗的cpu占比，采样100ms，将所有线程在这100ms内的cpu使用量求和，再算出每个线程的cpu使用占比。
  • TIME: 线程运行总时间，数据格式为分：秒
  • INTERRUPTED: 线程当前的中断位状态
  • DAEMON: 是否是daemon线程

截图展示

dashboard - 图1