Cleanup policies: move counts/metrics to the parent worker
Problem
Right, when executing cleanup policies, the limited capacity worker is computing the counts of:
- scheduled cleanups
- unfinished cleanups
combined they represent the cleanups left to go through.
The limited capacity worker doing writes, it hits the primary database
Proposal
Move these counts to the parent cron worker and make it hit the replica.
Impacts
- These metrics/counts will be computed in an hourly manner instead of many times per hour.