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)
Limits memory usage of uniqCombined functions to a maximum of 98KB.

Why it matters

This feature prevents the uniqCombined 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 the uniqCombined functions, so no user action is needed to enable this feature.