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Posted to dev@rocketmq.apache.org by GitBox <gi...@apache.org> on 2022/01/27 03:25:07 UTC
[GitHub] [rocketmq] 18205097282 commented on issue #3800: console dashboard 页面疑问

18205097282 commented on issue #3800:
URL: https://github.com/apache/rocketmq/issues/3800#issuecomment-1022812232


   不好意思&nbsp; 再麻烦您一下
   您说把最后X个数值相加处以X 就得到最后X时间内的getTotalTps。
   
   
   
   我的这段曲线是新建的broker。仅仅只在10:40处消费了2个message，其他时间均没有消费也没有生产消息。 为何之后它会一直有大于0的值呢？
   
   
   
   
   
   
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   发件人:                                                                                                                        "apache/rocketmq"                                                                                    ***@***.***&gt;;
   发送时间:&nbsp;2022年1月27日(星期四) 中午11:16
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   主题:&nbsp;Re: [apache/rocketmq] console dashboard 页面疑问 (Issue #3800)
   
   
   
   
   
    
   It is calculate by the metric getTotalTps, which shows the tps of getMessage call.
     
   When org.apache.rocketmq.store.DefaultMessageStore#getMessage is called, getMessageTimesTotalFound or getMessageTimesTotalMiss is incremented.
    
   org.apache.rocketmq.store.StoreStatsService#sampling is executed every second, and tag the current getMessageTimesTotalFound  or  getMessageTimesTotalMiss with current timestamp, and put them in getTimesFoundList or getTimesMissList separately.
    
   So each list contains a time series record of the number of getMessage operation, and each the timestamp between two consecutive item is about 1 second. The interval is NOT precise, because the generation of record is triggered by scheduled service in step 2.
    
   If you get the last X items in the list, sum the number of call times and divide the result by X, you can get the getTotalTps in the last X seconds.
     
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