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exec-mem-pool-bytes - Amazon Timestream
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exec-mem-pool-bytes

Parameter Details
Default20% of system memory
Allowed ValuesPercentage (e.g., 70%) or absolute number (0 – 1,610,612,736,000)
CategoryMemory Management

Detailed Explanation:

Defines the maximum amount of memory that the query execution engine (DataFusion) can use for processing queries. This includes memory for sorting, aggregation, joins, and intermediate result sets.

Recommendation: Keep at 20% (default) for all instance sizes. For query/reader-only nodes, you can increase up to 70%.