v.25.10Improvement

Added a new profile event

Official CH changelog text
Added a new profile event to track the number of times that a background merge was rejected due to exceeding memory limits. #88084 (Grant Holly).
Added a new profile event to track the count of background merges rejected due to exceeding memory limits.

Why it matters

This feature helps users monitor when background merge operations are prevented because they exceed the allocated memory limits, allowing better resource management and troubleshooting of merge-related performance issues.

How to use it

Users can view the new profile event metric in their query profiling or system monitoring tools to identify and analyze occurrences of memory limit rejections during background merges.

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