PXC-4742 [Doc] Release notes for - PXC 8.4.6

	new file:   docs/release-notes/8.4.6-6.md
	modified:   docs/release-notes/release-notes_index.md
	modified:   docs/templates/pdf_cover_page.tpl
	modified:   mkdocs-base.yml
	modified:   variables.yml

Author: alina-derkach-oaza

docs/release-notes/8.4.6-6.md

@@ -0,0 +1,56 @@
+# Percona XtraDB Cluster 8.4.6-6 (2025-09-)
+
+Percona XtraDB Cluster (PXC) supports critical business applications in both cloud and on-premises environments, including public, private, and hybrid setups. Our free, open source, enterprise-grade solution includes the high availability and security features your business requires to meet your customer expectations and business goals.
+
+## Release highlights
+
+Percona XtraDB Cluster 8.4.6-6 is based on Percona Server for MySQL and includes all improvements and bug fixes available in the [Percona Server for MySQL 8.4.6-6 (2025-09-08) release notes](https://docs.percona.com/percona-server/8.4/release-notes/8.4.6-6.html).
+
+### Percona XtraDB Cluster 8.4.6-6
+
+Improves State Snapshot Transfer (SST) by retrying Incremental State Transfer (IST) when initial SST attempts fail before any data changes, preventing unnecessary full data transfers.
+
+### Percona Server for MySQL 8.4.6-6
+
+Implements Link-Time Optimization (LTO) to generate more optimized release binaries, resulting in improved performance for specific workloads.
+
+### MySQL 8.4.6
+
+Bug fixes introduced by Oracle for MySQL 8.4.6 and included in Percona Server for MySQL are the following:
+
+* Fixed an issue where rebuilding a primary key with duplicate entries could cause the server to stop unexpectedly. (Bug #37822992)
+
+* Fixed an issue related to dropping columns that were part of an index. (Bug #37726881)
+
+* Fixed an issue with indexing spatial datatype columns. (Bug #36682518)
+
+* Fixed an issue where creating a secondary index on a `VARCHAR` column could exceed configured memory limits, with the amount allocated being directly related to the `value of innodb_ddl_buffer_size`, leading to errors such as ERROR 1136 (21S01): Column count doesn't match value count at row 1. (Bug #37233273)
+
+Find the complete list of bug fixes and changes in the [MySQL 8.4.6 release notes].
+
+## Build & packaging notes
+
+* The official packages were built with the `WITH_LTO=ON` flag to enable the Link-Time Optimization (LTO) feature.
+
+Find the complete list of bug fixes and changes in the [MySQL 8.4.6 release notes](https://dev.mysql.com/doc/relnotes/mysql/8.4/en/news-8-4-6.html).
+
+## New features
+
+* [PXC-4631](https://perconadev.atlassian.net/browse/PXC-4631): Improves State Snapshot Transfer (SST) by retrying Incremental State Transfer (IST) when initial SST attempts fail before any data changes, preventing unnecessary full data transfers.
+
+## Bug fixes
+
+* [PXC-4392](https://perconadev.atlassian.net/browse/PXC-4392): The default timeout logic for State Snapshot Transfer (SST) was insufficient and resulted in SST failures.
+
+* [PXC-4644](https://perconadev.atlassian.net/browse/PXC-4644): Fixed an issue where adding a foreign key (FK) without sufficient privileges caused the executing node to fail with error 1216, and the replicating nodes to fail with error 1452.
+
+## Useful links
+
+* The [Percona XtraDB Cluster installation instructions](https://www.percona.com/doc/percona-xtradb-cluster/8.4/install/index.html)
+
+* The [Percona XtraDB Cluster downloads](https://www.percona.com/downloads/Percona-XtraDB-Cluster-LATEST/#)
+
+* The [Percona XtraDB Cluster GitHub location](https://github.com/percona/percona-xtradb-cluster)
+
+* To contribute to the documentation, review the [Documentation Contribution Guide](https://github.com/percona/pxc-docs/blob/8.0/contributing.md)
+

docs/release-notes/release-notes_index.md

@@ -1,5 +1,7 @@
 # Percona XtraDB Cluster {{vers}} release notes index
 
+* [Percona XtraDB Cluster 8.4.6-6 (2025-09-)](8.4.6-6.md)
+
 * [Percona XtraDB Cluster 8.4.5-5 (2025-07-14)](8.4.5-5.md)
 
 * [Percona XtraDB Cluster 8.4.4-4 (2025-04-16)](8.4.4-4.md)

docs/templates/pdf_cover_page.tpl

@@ -7,5 +7,5 @@
 {% if config.site_description %}
 <h1>{{ config.site_description }}</h1>
 {% endif %} 
-<h2>8.4.5-5 (July 14, 2025)</h2>
+<h2>8.4.6-6 (September , 2025)</h2>
 <!--<h3>Percona Technical Documentation Team</h3>-->

mkdocs-base.yml

@@ -170,6 +170,7 @@ nav:
   - get-help.md
   - Release notes:
       - Release notes index: release-notes/release-notes_index.md
+      - release-notes/8.4.6-6.md
       - release-notes/8.4.5-5.md
       - release-notes/8.4.4-4.md
       - release-notes/8.4.3-3.md 

variables.yml

@@ -1,9 +1,9 @@
 # variables for HTML output
 
-release: '8.4.5-5'
+release: '8.4.6-6'
 version: '8.4'
 vers: '8.4' # we are going to use it instead of version
 pkg: 'pxc-84-lts'
-release_date: '2025-07-14'
-title_date: '2025-07-14'
+release_date: '2025-09-'
+title_date: '2025-09-'