如何在Grafana中减去一个度量的两个分组和

Question

我有一个度量标准kafka_skipped_consumer_message，我想得到最大当前值和最大值之间的差异被$ __范围抵消

我找到当前的最大值

sum by (service, version, topic, group)(max(kafka_skipped_consumer_message{server=~"$server",service=~"$service",version=~"$version",namespace=~"$namespace"}))

和带有偏移量的最大值

sum by (service, version, topic, group)(max(kafka_skipped_consumer_message{server=~"$server",service=~"$service",version=~"$version",namespace=~"$namespace"} offset $__range))

然后我试着减去它们，但我没有得到预期的结果。

sum by (service, version, topic, group)(max(kafka_skipped_consumer_message{server=~"$server",service=~"$service",version=~"$version",namespace=~"$namespace"})) - sum by (service, version, topic, group)(max(kafka_skipped_consumer_message{server=~"$server",service=~"$service",version=~"$version",namespace=~"$namespace"} offset $__range))

数据

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结果

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Answer 1

尝试如下所示：

sum by (service, version, topic, group)(delta(kafka_skipped_consumer_message{server=~"$server",service=~"$service",version=~"$version",namespace=~"$namespace"}[$__range]))

它应该返回当前值与过去在$__range偏移量处的值之间的差异，按以下标签分组：(service, version, topic, group)。它使用delta()函数计算当前值与过去值在方括号中指定的给定偏移量处的度量差。