Trade-offs between pre-aggregated and raw event data for dashboards
WHAT IT TESTS: Balancing latency, cost, and freshness in analytics. ANSWER OUTLINE: Pre-aggregations trade freshness for speed; raw queries preserve flexibility but spike cost and latency under load.
WHAT IT TESTS: Your ability to trade off latency, cost, freshness, and flexibility between rollups and raw event scans in high-traffic dashboards. ANSWER OUTLINE: Pre-aggregations store computed metrics ahead of time for fast responses and lower load, yet stale data and restricted drill-down follow unless you build many roll-up tables; raw queries guarantee the latest data and unlimited slicing but spike cost and latency under concurrent load.
Read the original → docs.embeddable.com
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