如何通过与普罗米修斯直方图分组的标签计算平均值？

Question

我在我的程序中对数据库查询进行了批处理，并希望根据批处理大小测量完成批处理查询的平均时间，目前我有

rate(batched_query_duration_seconds_sum{job="myprogram"}[5m]) / rate(batched_query_duration_seconds_count{job="myprogram"}[5m])

该指标有标签batch_size，我认为正确的查询应该是这样的

rate by (batch_size) (batched_query_duration_seconds_sum{job="myprogram"}[5m]) / rate by (batch_size) (batched_query_duration_seconds_count{job="myprogram"}[5m])

但这是语法错误。我怎样才能做到这一点？谢谢。

Answer 1

尝试以下查询：

sum(rate(batched_query_duration_seconds_sum{job="myprogram"}[5m])) by (batch_size) / sum(rate(batched_query_duration_seconds_count{job="myprogram"}[5m])) by (batch_size)