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sidebar_position: 1
sidebar_label: 2025
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# 2025 Changelog

### ClickHouse release v25.4.9.14-stable (5ca9638860e) FIXME as compared to v25.4.8.56-stable (9eda4814b6c)

#### Improvement
* Backported in [#82560](https://github.com/ClickHouse/ClickHouse/issues/82560): Add ability to reload `max_local_read_bandwidth_for_server` and `max_local_write_bandwidth_for_server` on fly without restart server. [#82083](https://github.com/ClickHouse/ClickHouse/pull/82083) ([Kai Zhu](https://github.com/nauu)).

#### Bug Fix (user-visible misbehavior in an official stable release)
* Backported in [#82993](https://github.com/ClickHouse/ClickHouse/issues/82993): When using a non-caching Database implementation, the metadata of the corresponding table is deleted after the columns are returned and the reference is invalidated. [#82939](https://github.com/ClickHouse/ClickHouse/pull/82939) ([buyval01](https://github.com/buyval01)).
* Backported in [#83082](https://github.com/ClickHouse/ClickHouse/issues/83082): Fixed incorrect output of function `formatDateTime` when formatter `%f` is used together with variable-size formatters (e.g. `%M`). [#83020](https://github.com/ClickHouse/ClickHouse/pull/83020) ([Robert Schulze](https://github.com/rschu1ze)).

#### Build/Testing/Packaging Improvement
* Backported in [#82893](https://github.com/ClickHouse/ClickHouse/issues/82893): Use `libarchive` 3.8.1. [#82648](https://github.com/ClickHouse/ClickHouse/pull/82648) ([Konstantin Bogdanov](https://github.com/thevar1able)).

#### NOT FOR CHANGELOG / INSIGNIFICANT

* Backported in [#82969](https://github.com/ClickHouse/ClickHouse/issues/82969): Keeper: some small digest and auth related fixes. [#82111](https://github.com/ClickHouse/ClickHouse/pull/82111) ([Antonio Andelic](https://github.com/antonio2368)).
* Backported in [#82957](https://github.com/ClickHouse/ClickHouse/issues/82957): Add error response for getSessionID. [#82600](https://github.com/ClickHouse/ClickHouse/pull/82600) ([JIaQi](https://github.com/JiaQiTang98)).

