Faster Data Selection and ZooKeeper Session Recovery in ReplicatedMergeTree Tables

Why it matters

This feature enhances the performance of ReplicatedMergeTree tables by optimizing the process of selecting data parts for merges, which speeds up internal maintenance operations. Additionally, it reduces downtime by enabling quicker recovery of ZooKeeper sessions, ensuring better availability and stability of replicated tables.

How to use it

This improvement is applied automatically with the update to the new ClickHouse version and does not require any manual user configuration.