Pre-aggregation lag

FOR CONTEXTPre-aggregation lag depends on how the data is kept freshFresh-data pathQuery-ready dataNewlywrittenOrderedraw dataOrdered pre-aggregatedFreshdatacontinuouslyQuery engineQuerycomputeFastanswerscontinuouslyPOSSIBLE LAG

Lag between raw data and pre-aggregated data

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Rows ingested

Published Part 2 freshness display curve. ClickHouse’s zero baseline represents synchronous incremental materialized-view maintenance. Snowflake refreshes its serverless materialized view asynchronously.