Storage & data retention
Three limits govern how much history you keep:
- Telemetry retention (
telemetry_retention_days) — how many days of readings are kept (below). - Telemetry storage (
max_storage, MB) — total stored measurements.0means unlimited. If you exceed it, new telemetry stops being stored until you free space or upgrade (live streaming still works). - Event retention (
event_retention_hours) — how long events stay in the feed.
How long readings are kept
Your plan's telemetry retention (telemetry_retention_days) is how far back your stored
readings go; 0 means the platform default of 365 days. Older readings are removed once a day,
on a whole-day boundary (UTC), so at any moment you may still find a day or two more than your
window. Charts and reports reach back as far as your window. Removed readings cannot be
restored.
If your window gets shorter — you move to a smaller plan, or a paid plan runs out — nothing older is removed for at least 30 days after the change. Move back to your previous plan in that time and nothing is removed at all; if you need a copy of the older readings before they go, contact support. Readings a gateway replays after being offline are kept only if they fall inside your window.
Some realtime-only tiers set store_telemetry = false — data streams live to dashboards but isn't persisted, so charts have no history seed. To estimate usage, see how is my storage calculated?. Need history out of the platform? Use an egress integration.