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Issue #, if available:
#925 #665
Description of changes:
NTH's prometheus metric, "actions_node", has a high cardinality due to its "node_name" and "node_event_id" labels. This causes each event to be tracked as its own time-series, which can cause a large amount of memory to be consumed over time.
A new metric, "actions", has been created without the "node_name" and "node_event_id" labels, greatly reducing the cardinality of the metric. The "actions_node" metric has been deprecated and the "actions" metric is recommended for use instead. The "actions_node" metric is planned for removal in later releases.
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.