QueryInsights - Amazon Timestream
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QueryInsights

QueryInsights is a performance tuning feature that helps you optimize your queries, reducing costs and improving performance. With QueryInsights, you can assess the pruning efficiency of your queries and identify areas for improvement to enhance query performance. With QueryInsights, you can also analyze the effectiveness of your queries in terms of temporal and spatial pruning, and identify opportunities to improve performance. Specifically, you can evaluate how well your queries use time-based and partition key-based indexing strategies to optimize data retrieval. To optimize query performance, it's essential that you fine-tune both the temporal and spatial parameters that govern query execution.

The key metrics provided by QueryInsights are QuerySpatialCoverage and QueryTemporalRange. QuerySpatialCoverage indicates how much of the spatial axis the query scans, with lower values being more efficient. QueryTemporalRange shows the time range scanned, with narrower ranges being more performant.

Benefits of QueryInsights

The following are the key benefits of using QueryInsights:

  • Identifying inefficient queries – QueryInsights provides information on the time-based and attribute-based pruning of the tables accessed by the query. This information helps you identify the tables that are sub-optimally accessed.

  • Optimizing your data model and partitioning – You can use the QueryInsights information to access and fine-tune your data model and partitioning strategy.

  • Tuning queries – QueryInsights highlights opportunities to use indexes more effectively.

Note

The maximum number of Query API requests you're allowed to make with QueryInsights enabled is 1 query per second (QPS). If you exceed this query rate, it might result in throttling.

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Mode

Provides the following modes to enable QueryInsights:

  • ENABLED_WITH_RATE_CONTROL – Enables QueryInsights for the queries being processed. This mode also includes a rate control mechanism, which limits the QueryInsights feature to 1 query per second (QPS).

  • DISABLED – Disables QueryInsights.

Type: String

Valid Values: ENABLED_WITH_RATE_CONTROL | DISABLED

Required: Yes

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: