v.19.16Improvement
Do Not Use More Than 98K of Memory in Uniqcombined Functions
Do not use more than 98K of memory in uniqCombined functions. #7236, #7270 (Azat Khuzhin)
Why it matters
This feature prevents theuniqCombined aggregate functions from using excessive memory, ensuring more predictable resource consumption and improved stability during query execution.How to use it
The memory limit is enforced internally in theuniqCombined functions, so no user action is needed to enable this feature.