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Posted to notifications@skywalking.apache.org by GitBox <gi...@apache.org> on 2021/04/27 10:55:36 UTC

[GitHub] [skywalking] pope12389 opened a new issue #6857: how can i understand cpu useage? it looks like incorrect

pope12389 opened a new issue #6857:
URL: https://github.com/apache/skywalking/issues/6857


   Please answer these questions before submitting your issue.
   
   ___
   ### Question
   
   in infrastructure monitoring 
   how can i understand cpu useage?
   it always 0.0 
   ___
   ![image](https://user-images.githubusercontent.com/9252880/116229805-82198200-a789-11eb-9edb-c4954d9cd192.png)
   here is the config:
   ![image](https://user-images.githubusercontent.com/9252880/116229938-9fe6e700-a789-11eb-958b-ba7fd5579195.png)
   
   otel-collector-config:
   ![image](https://user-images.githubusercontent.com/9252880/116229997-b55c1100-a789-11eb-901a-f1ce834d58b5.png)
   
   


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[GitHub] [skywalking] pope12389 commented on issue #6857: how can i understand cpu useage? it looks like incorrect

Posted by GitBox <gi...@apache.org>.

pope12389 commented on issue #6857:
URL: https://github.com/apache/skywalking/issues/6857#issuecomment-828058898


   i've change the config to irate. 
   
   
   ![image](https://user-images.githubusercontent.com/9252880/116329805-aebbb100-a7fe-11eb-8299-139fe9d9bbd9.png)
   
   
   ![image](https://user-images.githubusercontent.com/9252880/116329581-41a81b80-a7fe-11eb-88b9-d4308c8afa60.png)
   
   ![image](https://user-images.githubusercontent.com/9252880/116329575-3ce36780-a7fe-11eb-96ce-3968bb6dc0ac.png)
   
   here is the promethues collector info:
   ![image](https://user-images.githubusercontent.com/9252880/116329897-e0347c80-a7fe-11eb-9617-ff40c0d40800.png)
   
   node exporter info:
   node_cpu_seconds_total{cpu="0",mode="idle"} 815137.84
   node_cpu_seconds_total{cpu="0",mode="iowait"} 10458.64
   node_cpu_seconds_total{cpu="0",mode="irq"} 0
   node_cpu_seconds_total{cpu="0",mode="nice"} 2.41
   node_cpu_seconds_total{cpu="0",mode="softirq"} 6421.4
   node_cpu_seconds_total{cpu="0",mode="steal"} 0
   node_cpu_seconds_total{cpu="0",mode="system"} 26899.33
   node_cpu_seconds_total{cpu="0",mode="user"} 82443.91
   node_cpu_seconds_total{cpu="1",mode="idle"} 817822.83
   node_cpu_seconds_total{cpu="1",mode="iowait"} 9163.18
   node_cpu_seconds_total{cpu="1",mode="irq"} 0
   node_cpu_seconds_total{cpu="1",mode="nice"} 2.27
   node_cpu_seconds_total{cpu="1",mode="softirq"} 3993.8
   node_cpu_seconds_total{cpu="1",mode="steal"} 0
   node_cpu_seconds_total{cpu="1",mode="system"} 26800.13
   node_cpu_seconds_total{cpu="1",mode="user"} 83231.37
   node_cpu_seconds_total{cpu="2",mode="idle"} 817083.51
   node_cpu_seconds_total{cpu="2",mode="iowait"} 8699.93
   node_cpu_seconds_total{cpu="2",mode="irq"} 0
   node_cpu_seconds_total{cpu="2",mode="nice"} 3.06
   node_cpu_seconds_total{cpu="2",mode="softirq"} 3325.54
   node_cpu_seconds_total{cpu="2",mode="steal"} 0
   node_cpu_seconds_total{cpu="2",mode="system"} 26521.71
   node_cpu_seconds_total{cpu="2",mode="user"} 84404.14
   node_cpu_seconds_total{cpu="3",mode="idle"} 818108.08
   node_cpu_seconds_total{cpu="3",mode="iowait"} 8813.03
   node_cpu_seconds_total{cpu="3",mode="irq"} 0
   node_cpu_seconds_total{cpu="3",mode="nice"} 2.38
   node_cpu_seconds_total{cpu="3",mode="softirq"} 3131.57
   node_cpu_seconds_total{cpu="3",mode="steal"} 0
   node_cpu_seconds_total{cpu="3",mode="system"} 26872.19
   node_cpu_seconds_total{cpu="3",mode="user"} 83934.8
   node_cpu_seconds_total{cpu="4",mode="idle"} 819348.98
   node_cpu_seconds_total{cpu="4",mode="iowait"} 8770.52
   node_cpu_seconds_total{cpu="4",mode="irq"} 0
   node_cpu_seconds_total{cpu="4",mode="nice"} 2.52
   node_cpu_seconds_total{cpu="4",mode="softirq"} 3038.3
   node_cpu_seconds_total{cpu="4",mode="steal"} 0
   node_cpu_seconds_total{cpu="4",mode="system"} 26647.34
   node_cpu_seconds_total{cpu="4",mode="user"} 83536.82
   node_cpu_seconds_total{cpu="5",mode="idle"} 818377.95
   node_cpu_seconds_total{cpu="5",mode="iowait"} 8682.65
   node_cpu_seconds_total{cpu="5",mode="irq"} 0
   node_cpu_seconds_total{cpu="5",mode="nice"} 2.83
   node_cpu_seconds_total{cpu="5",mode="softirq"} 2979.97
   node_cpu_seconds_total{cpu="5",mode="steal"} 0
   node_cpu_seconds_total{cpu="5",mode="system"} 26828
   node_cpu_seconds_total{cpu="5",mode="user"} 84234.19
   node_cpu_seconds_total{cpu="6",mode="idle"} 818812.64
   node_cpu_seconds_total{cpu="6",mode="iowait"} 8591.55
   node_cpu_seconds_total{cpu="6",mode="irq"} 0
   node_cpu_seconds_total{cpu="6",mode="nice"} 2.61
   node_cpu_seconds_total{cpu="6",mode="softirq"} 2907.02
   node_cpu_seconds_total{cpu="6",mode="steal"} 0
   node_cpu_seconds_total{cpu="6",mode="system"} 26629.19
   node_cpu_seconds_total{cpu="6",mode="user"} 84268.84
   node_cpu_seconds_total{cpu="7",mode="idle"} 849867.47
   node_cpu_seconds_total{cpu="7",mode="iowait"} 9926.45
   node_cpu_seconds_total{cpu="7",mode="irq"} 0
   node_cpu_seconds_total{cpu="7",mode="nice"} 2.36
   node_cpu_seconds_total{cpu="7",mode="softirq"} 14627.28
   node_cpu_seconds_total{cpu="7",mode="steal"} 0
   node_cpu_seconds_total{cpu="7",mode="system"} 19884.98
   node_cpu_seconds_total{cpu="7",mode="user"} 42339.94
   


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[GitHub] [skywalking] wu-sheng commented on issue #6857: how can i understand cpu useage? it looks like incorrect

Posted by GitBox <gi...@apache.org>.

wu-sheng commented on issue #6857:
URL: https://github.com/apache/skywalking/issues/6857#issuecomment-827521710


   @wankai123  Do you want to give an explanation?


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[GitHub] [skywalking] wu-sheng closed issue #6857: how can i understand cpu useage? it looks like incorrect

Posted by GitBox <gi...@apache.org>.

wu-sheng closed issue #6857:
URL: https://github.com/apache/skywalking/issues/6857


   


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[GitHub] [skywalking] wankai123 commented on issue #6857: how can i understand cpu useage? it looks like incorrect

Posted by GitBox <gi...@apache.org>.

wankai123 commented on issue #6857:
URL: https://github.com/apache/skywalking/issues/6857#issuecomment-828122877


   Thanks for the info, it seems a bug, I will find it out.  


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[GitHub] [skywalking] wankai123 edited a comment on issue #6857: how can i understand cpu useage? it looks like incorrect

Posted by GitBox <gi...@apache.org>.

wankai123 edited a comment on issue #6857:
URL: https://github.com/apache/skywalking/issues/6857#issuecomment-827598809


   How many cores the VM has？It seems always idle. 
   The CPU max usage is 100% * cores.
   `rate('PT1M')`  is the per-second average rate of increase **in a minute**, and if the value is less than 1 there will show 0.
   Could you make the CPU busier and use the command `top` in the OS to compare the CPU usage ？
   And you can try replace `rate('PT1M')` to `irate()`.
   Then I can found out whether this is a bug. @pope12389 


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[GitHub] [skywalking] pope12389 removed a comment on issue #6857: how can i understand cpu useage? it looks like incorrect

Posted by GitBox <gi...@apache.org>.

pope12389 removed a comment on issue #6857:
URL: https://github.com/apache/skywalking/issues/6857#issuecomment-828059334


   > How many cores the VM has？It seems always idle.
   > The CPU max usage is 100% * cores.
   > `rate('PT1M')` is the per-second average rate of increase **in a minute**, and if the value is less than 1 there will show 0.
   > Could you make the CPU busier and use the command `top` in the OS to compare the CPU usage ？
   > And you can try replace `rate('PT1M')` to `irate()`.
   > Then I can found out whether this is a bug. @pope12389
   https://github.com/apache/skywalking/issues/6857#issuecomment-828058898
   


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[GitHub] [skywalking] pope12389 commented on issue #6857: how can i understand cpu useage? it looks like incorrect

Posted by GitBox <gi...@apache.org>.

pope12389 commented on issue #6857:
URL: https://github.com/apache/skywalking/issues/6857#issuecomment-828059334


   > How many cores the VM has？It seems always idle.
   > The CPU max usage is 100% * cores.
   > `rate('PT1M')` is the per-second average rate of increase **in a minute**, and if the value is less than 1 there will show 0.
   > Could you make the CPU busier and use the command `top` in the OS to compare the CPU usage ？
   > And you can try replace `rate('PT1M')` to `irate()`.
   > Then I can found out whether this is a bug. @pope12389
   https://github.com/apache/skywalking/issues/6857#issuecomment-828058898
   


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[GitHub] [skywalking] wankai123 commented on issue #6857: how can i understand cpu useage? it looks like incorrect

Posted by GitBox <gi...@apache.org>.

wankai123 commented on issue #6857:
URL: https://github.com/apache/skywalking/issues/6857#issuecomment-827598809


   How many cores the VM has？It seems always idle. The CPU max usage is 100% * cores.
   `rate('PT1M')`  is the per-second average rate of increase **in a minute**, and if the value is less than 1 there will show 0.
   Could you make the CPU busier and use the command `top` in the OS to compare the CPU usage ？
   And you can try replace `rate('PT1M')` to `irate()`.
   Then I can found out whether this is a bug. @pope12389 


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