The October 2025 ClickHouse newsletter highlights several key developments and events, including a newly redesigned text index, enhanced scaling request logging capabilities, and the introduction of the DataLakeCatalog engine in ClickHouse Cloud. The newsletter features Mayank Joshi, Co-Founder and CTO at Auditzy, who achieved significant performance improvements by migrating from PostgreSQL to ClickHouse. It also outlines various upcoming events such as the Amsterdam User Conference and training sessions on real-time analytics and observability at scale with ClickStack. Technical insights include Geocodio's migration from MariaDB to ClickHouse for handling billions of geocoding requests and Laravel Nightwatch's use of Amazon MSK and ClickHouse Cloud for high-performance observability. Additionally, the newsletter discusses modeling messy data for OLAP performance, building ClickHouse-powered analytics APIs, and various quick reads and video content showcasing ClickHouse's capabilities in different contexts.