kumomta/docs/reference/metrics/proxy-server/thread_pool_parked.md

thread_pool_parked

Type: Gauge
Labels: pool

number of parked (idle) threads in a thread pool.

!!! info This metric has labels which means that the system will track the metric for each combination of the possible labels that are active. Certain labels, especially those that correlate with source or destination addresses or domains, can have high cardinality. High cardinality metrics may require some care and attention when provisioning a downstream metrics server.