Attribute allow list: if specified, only the attributes it names are published with the values of the metric - everything else is dropped. Every distinct combination of attribute values is a time series of its own, so this is the way to keep a metric to the dimensions that are actually needed.

An entry names an attribute by its flattened (dot-separated) name, or everything nested under it: "bounds" covers "bounds.left". An empty list publishes no attributes at all.

Can be specified for a single metric (publishingSettings), for all metrics (defaultPublishingSettings) and in a metric filter. The list of the most specific level that has one applies - a matching filter, then the metric, then the defaults; lists are not merged. Applies to the attributes of the metric values, not to the resource attributes.

Controls the publishing of specific attributes.

Attribute drop list: the attributes it names are never published with the values of the metric. Entries are matched like the ones of allowAttributes. The drop lists of all the levels add up (the defaults, the metric and a matching filter), and an attribute that is dropped stays dropped even if an allow list names it.

Defines sampling probability for the metric.