# ClickHouse Release 25.11

DevFeed: [ClickHouse Release 25.11](<https://devfeed.tech/articles/clickhouse-release-25-11-5134.md>)

Original publisher: [Read original article](<https://clickhouse.com/blog/clickhouse-release-25-11>)

Author: ClickHouse

Published: 2025-12-05T00:00:00Z

Content type: release

Language: en

Sources: [ClickHouse Blog](<https://devfeed.tech/sources/clickhouse-blog.md>)

Topics: [clickhouse](<https://devfeed.tech/topics/clickhouse.md>), [Optimization](<https://devfeed.tech/topics/optimization.md>), [TLS (Transport Layer Security)](<https://devfeed.tech/topics/tls.md>), [Algorithms, Complexity](<https://devfeed.tech/topics/algorithms-complexity.md>)

Tags: [clickhouse](<https://devfeed.tech/tags/clickhouse.md>), [configuration](<https://devfeed.tech/tags/configuration.md>), [optimization](<https://devfeed.tech/tags/optimization.md>), [performance](<https://devfeed.tech/tags/performance.md>), [post](<https://devfeed.tech/tags/post.md>), [release](<https://devfeed.tech/tags/release.md>), [tls](<https://devfeed.tech/tags/tls.md>)

## AI overview

ClickHouse 25.11 is a monthly release with 24 new features, 27 performance optimizations, and 97 bug fixes. Highlights include automatic TLS certificate provisioning through ACME providers, parallel merging for small GROUP BY operations, and projections as secondary indices.

## Source excerpt

ClickHouse 25.11 is here! In this post, you will learn about parallel merge for small GROUP BY, projections as secondary indices, and more!