Introduces a sampling profiler at the query level in ClickHouse, enabling detailed performance analysis of query execution.
Why it matters
This feature helps users identify performance bottlenecks by periodically sampling the state of query execution. It provides insights into which parts of the query consume the most resources or time, improving the ability to optimize and debug queries effectively.How to use it
Users can enable the sampling profiler by activating specific profiling settings or using provided tools to collect samples during query execution. Refer to the example linked for practical usage. Profiling data can then be analyzed to understand query behavior and performance characteristics.