In Growth's Suggested Edits Grafana dashboard, there are metrics related to task pool size or number of dangling records. Unfortunately, those metrics are currently empty:

This is an unintended consequence of our work on T359352: Migrate GrowthExperiments Extension to statslib, more specifically, on T374050. The exact cause of this issue is T380609: Maintenance scripts do not emit StatsLib metrics. Filling this task to track the issue itself, so that we do not forget about it.