distinct-value-cache-disable-from-history (Enterprise only) - Amazon Timestream

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distinct-value-cache-disable-from-history (Enterprise only)

Parameter Details
DefaultFALSE
Allowed ValuesFALSE, TRUE
CategoryCaching (Enterprise only)

Detailed Explanation:

Controls whether the distinct value cache is populated from historical Parquet files in addition to real-time data. When FALSE, the system scans historical files for a complete picture of all distinct tag values.

Recommendation: FALSE (default) for query-heavy workloads. TRUE for write-heavy workloads or very high tag cardinality (millions).