# Live Collection Operations

During live Heroku data collection, keep participant-facing traffic isolated from heavy admin tasks.

- Use the oTree admin report only as a lightweight, read-only monitor. It reads cached replay inventory state and should not reconcile participant data on refresh.
- Option B lightweight monitor: set `enable_lightweight_inventory_monitor=True`, create/open a monitor participant with participant label `INVENTORY_MONITOR`, and leave that page open. The page polls cached inventory status every 8 seconds and does not assign, reconcile, lock, or write.
- Do not run regular exports, wide exports, delete-session actions, or create-demo-session actions while participants are live.
- Do not use app code to repair corrupted old sessions. Launch production with a clean database.
- Full replay-inventory reconciliation is a development/debug operation only. Do not run reconciliation from participant pages, the admin report, or the lightweight monitor while participants are active.