v.23.2Improvement

Do Not Load Named Collections on Server Startup

Do not load named collections on server startup (load them on first access instead). #46607 (Kseniia Sumarokova).
ClickHouse delays loading named collections until their first access instead of loading them all during server startup.

Why it matters

This feature improves server startup performance by avoiding the upfront cost of loading all named collections, which can be unnecessary if some collections are never used during a server session. It optimizes resource usage and reduces startup time.

How to use it

Users do not need to take explicit action; named collections will automatically load on their first use rather than at server startup.