v.25.11Improvement

Async server log: Flush earlier and increase

Async server log: Flush earlier and increase default queue size. #89597 (Raúl Marín).
Improves the async server log by flushing earlier and increasing the default queue size.

Why it matters

This feature enhances the performance and reliability of the async server log by reducing latency in log flushing and accommodating more log entries in the queue, preventing potential data loss during high load.

How to use it

The feature is applied automatically by default with the updated ClickHouse version; no additional configuration is needed. Users will benefit from earlier flushing behavior and a larger default async server log queue size out of the box.