Arthas-monitor命令监控方法调用次数、成功次数、失败次数、平局响应时间和失败率

àì夳堔傛蜴生んèń 2023-10-07 21:34 53阅读 0赞

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 ####

<table> 
 <thead> 
  <tr> 
   <th>监控项</th> 
   <th>说明</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>timestamp</td> 
   <td>时间戳</td> 
  </tr> 
  <tr> 
   <td>class</td> 
   <td>Java 类</td> 
  </tr> 
  <tr> 
   <td>method</td> 
   <td>方法（构造方法、普通方法）</td> 
  </tr> 
  <tr> 
   <td>total</td> 
   <td>调用次数</td> 
  </tr> 
  <tr> 
   <td>success</td> 
   <td>成功次数</td> 
  </tr> 
  <tr> 
   <td>fail</td> 
   <td>失败次数</td> 
  </tr> 
  <tr> 
   <td>rt</td> 
   <td>平均 RT</td> 
  </tr> 
  <tr> 
   <td>fail-rate</td> 
   <td>失败率</td> 
  </tr> 
 </tbody> 
</table>

#### 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

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

#### 使用参考 ####

$ monitor -c 5 demo.MathGame primeFactors
    Press Ctrl+C to abort.
    Affect(class-cnt:1 , method-cnt:1) cost in 94 ms.
     timestamp            class          method        total  success  fail  avg-rt(ms)  fail-rate
    -----------------------------------------------------------------------------------------------
     2018-12-03 19:06:38  demo.MathGame  primeFactors  5      1        4     1.15        80.00%
    
     timestamp            class          method        total  success  fail  avg-rt(ms)  fail-rate
    -----------------------------------------------------------------------------------------------
     2018-12-03 19:06:43  demo.MathGame  primeFactors  5      3        2     42.29       40.00%
    
     timestamp            class          method        total  success  fail  avg-rt(ms)  fail-rate
    -----------------------------------------------------------------------------------------------
     2018-12-03 19:06:48  demo.MathGame  primeFactors  5      3        2     67.92       40.00%
    
     timestamp            class          method        total  success  fail  avg-rt(ms)  fail-rate
    -----------------------------------------------------------------------------------------------
     2018-12-03 19:06:53  demo.MathGame  primeFactors  5      2        3     0.25        60.00%
    
     timestamp            class          method        total  success  fail  avg-rt(ms)  fail-rate
    -----------------------------------------------------------------------------------------------
     2018-12-03 19:06:58  demo.MathGame  primeFactors  1      1        0     0.45        0.00%
    
     timestamp            class          method        total  success  fail  avg-rt(ms)  fail-rate
    -----------------------------------------------------------------------------------------------
     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) #####

monitor -c 5 demo.MathGame primeFactors "params[0] <= 2"
    Press Q or Ctrl+C to abort.
    Affect(class count: 1 , method count: 1) cost in 19 ms, listenerId: 5
     timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate
    -----------------------------------------------------------------------------------------------
     2020-09-02 09:42:36  demo.MathGame  primeFactors    5       3       2      0.09       40.00%
    
     timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate
    ----------------------------------------------------------------------------------------------
     2020-09-02 09:42:41  demo.MathGame  primeFactors    5       2       3      0.11       60.00%
    
     timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate
    ----------------------------------------------------------------------------------------------
     2020-09-02 09:42:46  demo.MathGame  primeFactors    5       1       4      0.06       80.00%
    
     timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate
    ----------------------------------------------------------------------------------------------
     2020-09-02 09:42:51  demo.MathGame  primeFactors    5       1       4      0.12       80.00%
    
     timestamp            class          method         total  success  fail  avg-rt(ms)  fail-rate
    ----------------------------------------------------------------------------------------------
     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) ####

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