Chart caching controls how often Tractorscope reuses query results instead of running a fresh query.
Cache time to live
Chart cache time to live, or TTL, is the amount of time query results can be reused before Tractorscope runs the query again. Shorter TTLs keep data fresher. Longer TTLs reduce database load.
Manual refresh
Use manual refresh when you need the latest result immediately. This is useful after changing a query, updating a dashboard, or checking whether recent source data has arrived.
Choosing a TTL
Use shorter TTLs for operational dashboards and alerts that need fresh data. Use longer TTLs for slow queries, large datasets, historical reports, or dashboards that do not change often.
Embedded dashboards
Embedded dashboards also depend on chart cache settings. Choose TTL values based on what embedded viewers expect and what your database can support.
Troubleshooting stale data
If a chart appears stale:
- Check the chart cache TTL.
- Refresh the chart manually.
- Confirm dashboard filters are set correctly.
- Confirm the source database has updated.
- Check database health and query errors.