25.8.33.10001 Altinity Stable

25.8.33.10001 Altinity Stable (f998c52) as compared to v25.8.28.10001.altinitystable (568824f4327b379e86bce93f12b9cebe0cfd9ff5)

Performance Improvements

• A bunch of micro-optimizations to speed up small queries References ClickHouse#81043 (ClickHouse#83096 by @Algunenano via #2535)
• jemalloc: lower lg_extent_max_active_fit to default 6, to reduce fragmentation (ClickHouse#116836 by @azat via #2538)

Bug Fixes (user-visible misbehavior in an official stable release)

• Fix potential crash caused by in place mutation of underlying const PREWHERE columns. This could've happened at column shrinking (IColumn::shrinkToFit) or filtering (IColumn::filter), which could've triggered concurrently from several threads. (ClickHouse#92588 by @arsenmuk via #2254)
• Fix logical error with join_use_nulls and multiple joins along with cross join (ClickHouse#91853 by @vdimir via #2283)
• Fix a possible crash when querying the view over Distributed with enable_analyzer=0 (ClickHouse#123431 by @mkmkme via #2495)
• Fix a bug where using aliases and row policies with enable_analyzer=0 could error out (ClickHouse#123436 by @mkmkme via #2496)
• Fix the KafkaConsumersWithAssignment metric drifting negative - it was decremented twice for every consumer group rebalance. (ClickHouse#113919 by @kalavt via #2497)
• Fix a crash when reading Iceberg tables with equality delete files. If a column is nullable in the equality delete file but non-nullable in the table schema (or vice versa), the values read from the delete file were inserted into a column of a different type through an unchecked cast (a column type confusion), corrupting the column and crashing the server (ClickHouse#109551 by @mstetsyuk via #2539)

Build/Testing/Packaging Improvements

• docker/alpine: update all packages on image build (#2531 by @MyroTk)

Build report

Packages

Available for both AMD64 and Aarch64 from https://builds.altinity.cloud/#altinitystable as either .deb, .rpm, or .tgz

Docker images

Available for both AMD64 and Aarch64: altinity/clickhouse-server:25.8.33.10001.altinitystable

Full Changelog: 568824f...f998c52