Offline spool and retries
Understand what the agent buffers during an outage and where its limits are.
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When the connection fails
The agent saves pending readings locally and retries them with the same IDs, even after a restart. Its default buffer is limited to 64 MiB and 24 hours. When full or too old, the oldest batches are discarded and losses counted. Invalid data can also be discarded. Fix key or permission errors promptly. The first heartbeat and reading in your monitor confirm that setup worked; a running process alone does not.
Unavailable readings and gaps
Readings depend on the operating system, hardware and permissions. Unsupported or failed checks are shown separately, never as made-up zeros. After a restart or a long pause, some rates need fresh samples before they can be shown. Check the measurement description and unit when comparing different platforms.
Related guides
- Update, diagnose and remove the agent
Check the agent's status, update it or remove its local service.
- Send your own monitoring data
Send your own readings over HTTPS using the IDs and keys of your monitor.
- Data retention
Choose how long your measurements remain available. Set shorter periods for your account or an individual monitor, review the effect before saving and follow the cleanup status.