You can now enable sampling in all major chart types to speed up queries on large datasets—while still getting directionally accurate results.
Use user-level sampling in Funnel, Distribution, Retention, and User Journey charts
Use event-level sampling in Metric Drilldown
Toggle sampling on or off in chart settings
See when sampling is active, and disable it at any time for exact results
Sampling is off by default. When toggled on, it only applies under high-volume conditions:
Warehouse Native: Sampling applies if metric sources exceed 100K rows/day or row counts can’t be determined. For User Journeys, sampling is always applied when toggled on.
Cloud: Sampling applies if the event volume in the query exceeds 100K. For Journeys, we look at total event volume across the company.
In Drilldown, event-level sampling is used for high-volume events unless the variance is too high, in which case we fall back to full data.
Sampling helps you move faster through exploratory workflows. In early results, User Journey query times dropped by over 60% when sampling was applied.
It’s a small precision tradeoff for a much faster iteration loop.