stats: data sent to exporters keeps growing over time

[rghetia]

The issue was opened originally on go repo but it is applicable to all languages. Hence opening an issue here.

original issue

[Thooms]

I'm the reporter of the original issue, don't hesitate if I can be of any help :)

[bogdandrutu]

I have a proposal in my mind, which works only with some backends (Stackdriver I know supports this). The proposal is to export "deltas" for cumulative metrics, which means the set of tags combinations will be limited to an export interval which it suppose to be smaller than the whole set of combinations from the entire life of the process.