Under the hood with Continuous Queries - Part II

InfluxDB's Continuous Queries allow pre-computing and storing query results, enabling efficient execution without overloading the database. The Continuous Querier service executes queries behind the scenes, mimicking user interaction and running continuously. A continuous query is created using the `CREATE CONTINUOUS QUERY` statement, parsed, validated, and stored in the cluster-wide database metastore. The querier service schedules executions based on the group by interval, estimated using a formula that considers compute-runs-per-interval and max frequency settings. Continuous queries automatically recompute previous intervals to handle lagged data, writing results to disk with an optional retention policy. InfluxDB's continuous query execution provides automatic downsampling, making it suitable for applications requiring real-time data processing.

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