monitor

monitor在线教程

方法执行监控

对匹配 class-pattern／method-pattern／condition-express的类、方法的调用进行监控。

monitor 命令是一个非实时返回命令.

实时返回命令是输入之后立即返回，而非实时返回的命令，则是不断的等待目标 Java 进程返回信息，直到用户输入 Ctrl+C 为止。

服务端是以任务的形式在后台跑任务，植入的代码随着任务的中止而不会被执行，所以任务关闭后，不会对原有性能产生太大影响，而且原则上，任何Arthas命令不会引起原有业务逻辑的改变。

监控的维度说明

监控项说明
timestamp时间戳
classJava类
method方法（构造方法、普通方法）
total调用次数
success成功次数
fail失败次数
rt平均RT
fail-rate失败率

参数说明

方法拥有一个命名参数 [c:]，意思是统计周期（cycle of output），拥有一个整型的参数值

参数名称参数说明
class-pattern类名表达式匹配
method-pattern方法名表达式匹配
condition-express条件表达式
[E]开启正则表达式匹配，默认为通配符匹配
[c:]统计周期，默认值为120秒
[b]在方法调用之前计算condition-express

使用参考

  1. $ monitor -c 5 demo.MathGame primeFactors
  2. Press Ctrl+C to abort.
  3. Affect(class-cnt:1 , method-cnt:1) cost in 94 ms.
  4.  timestamp            class          method        total  success  fail  avg-rt(ms)  fail-rate
  5. -----------------------------------------------------------------------------------------------
  6.  2018-12-03 19:06:38  demo.MathGame  primeFactors  5      1        4     1.15        80.00%
  8.  timestamp            class          method        total  success  fail  avg-rt(ms)  fail-rate
  9. -----------------------------------------------------------------------------------------------
  10.  2018-12-03 19:06:43  demo.MathGame  primeFactors  5      3        2     42.29       40.00%
  12.  timestamp            class          method        total  success  fail  avg-rt(ms)  fail-rate
  13. -----------------------------------------------------------------------------------------------
  14.  2018-12-03 19:06:48  demo.MathGame  primeFactors  5      3        2     67.92       40.00%
  16.  timestamp            class          method        total  success  fail  avg-rt(ms)  fail-rate
  17. -----------------------------------------------------------------------------------------------
  18.  2018-12-03 19:06:53  demo.MathGame  primeFactors  5      2        3     0.25        60.00%
  20.  timestamp            class          method        total  success  fail  avg-rt(ms)  fail-rate
  21. -----------------------------------------------------------------------------------------------
  22.  2018-12-03 19:06:58  demo.MathGame  primeFactors  1      1        0     0.45        0.00%
  24.  timestamp            class          method        total  success  fail  avg-rt(ms)  fail-rate
  25. -----------------------------------------------------------------------------------------------
  26.  2018-12-03 19:07:03  demo.MathGame  primeFactors  2      2        0     3182.72     0.00%

计算条件表达式过滤统计结果(方法执行完毕之后)

  1. monitor -c 5 demo.MathGame primeFactors "params[0] <= 2"
  2. Press Q or Ctrl+C to abort.
  3. Affect(class count: 1 , method count: 1) cost in 19 ms, listenerId: 5
  4.  timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate        
  5. -----------------------------------------------------------------------------------------------
  6.  2020-09-02 09:42:36  demo.MathGame  primeFactors    5       3       2      0.09       40.00%           
  8.  timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate        
  9. ----------------------------------------------------------------------------------------------
  10.  2020-09-02 09:42:41  demo.MathGame  primeFactors    5       2       3      0.11       60.00%           
  12.  timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate        
  13. ----------------------------------------------------------------------------------------------
  14.  2020-09-02 09:42:46  demo.MathGame  primeFactors    5       1       4      0.06       80.00%           
  16.  timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate        
  17. ----------------------------------------------------------------------------------------------
  18.  2020-09-02 09:42:51  demo.MathGame  primeFactors    5       1       4      0.12       80.00%           
  20.  timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate        
  21. ----------------------------------------------------------------------------------------------
  22.  2020-09-02 09:42:56  demo.MathGame  primeFactors    5       3       2      0.15       40.00%

计算条件表达式过滤统计结果(方法执行完毕之前)

  1. monitor -b -c 5 com.test.testes.MathGame primeFactors "params[0] <= 2"
  2. Press Q or Ctrl+C to abort.
  3. Affect(class count: 1 , method count: 1) cost in 21 ms, listenerId: 4
  4.  timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate        
  5. ----------------------------------------------------------------------------------------------
  6.  2020-09-02 09:41:57  demo.MathGame  primeFactors    1       0        1      0.10      100.00%          
  8.  timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate        
  9. ----------------------------------------------------------------------------------------------
  10.  2020-09-02 09:42:02  demo.MathGame  primeFactors    3       0        3      0.06      100.00%  
  12.  timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate        
  13. ----------------------------------------------------------------------------------------------
  14.  2020-09-02 09:42:07  demo.MathGame  primeFactors    2       0        2      0.06      100.00% 
  16.  timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate        
  17. ----------------------------------------------------------------------------------------------
  18.  2020-09-02 09:42:12  demo.MathGame  primeFactors    1       0        1      0.05      100.00% 
  20.  timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate        
  21. ----------------------------------------------------------------------------------------------
  22.  2020-09-02 09:42:17  demo.MathGame  primeFactors    2       0        2      0.10      100.00%