Enabled dynamic increase of the number of threads for background operations such as merges, mutations, moves, and fetches when they are configured at the top-level config.
Why it matters
This feature allows users to adjust the thread count for executing background tasks at runtime, providing more flexibility and control over resource allocation and performance tuning without restarting the server.How to use it
Specify the number of threads for background operations (merges, mutations, moves, fetches) in the top-level ClickHouse configuration file. At runtime, you can increase these thread counts dynamically to optimize background process execution.