# MariaDB ColumnStore 5.6.5 Release Notes

## Overview

[MariaDB ColumnStore](https://github.com/mariadb-corporation/docs-release-notes/blob/test/en/mariadb-columnstore/README.md) 5.6.5 is a maintenance release of [MariaDB ColumnStore](https://github.com/mariadb-corporation/docs-release-notes/blob/test/en/mariadb-columnstore/README.md). MariaDB ColumnStore is a columnar storage engine included with MariaDB Enterprise Server. This is the eighth release in the ColumnStore 5 series.

MariaDB ColumnStore 5.6.5 was released on 2022-02-14. This release is of General Availability (GA) maturity.

This release of MariaDB ColumnStore is included with MariaDB Enterprise Server 10.5.13-9 and MariaDB Enterprise Server 10.5.15-10.

## Notable Changes

* CMAPI 1.6.2 was originally included
* CMAPI 1.6.3 is now included
* CMAPI is a REST API for administering MariaDB ColumnStore in multi-node topologies.

For additional information, see "Release Notes for CMAPI 1.6.2" and "Release Notes for CMAPI 1.6.3".

## Issues Fixed

* Related to performance
* When performing a bulk data load, performance can be negatively impacted by slow extent map lookups. ([MCOL-4912](https://jira.mariadb.org/browse/MCOL-4912))

## Platforms

In alignment with the [enterprise lifecycle](/docs/release-notes/enterprise-server/about/enterprise-server-lifecycle.md), MariaDB ColumnStore 5.6.5 is provided for:

* CentOS 7 (x86\_64)
* Debian 10 (x86\_64)
* Red Hat Enterprise Linux 7 (x86\_64)
* Red Hat Enterprise Linux 8 (x86\_64)
* Ubuntu 18.04 (x86\_64)
* Ubuntu 20.04 (x86\_64)

## Installation Instructions

* [ColumnStore Object Storage Topology with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/columnstore-object-storage.md)[ and MariaDB ColumnStore 5](/docs/server/architecture/topologies/columnstore-object-storage.md)
* [ColumnStore Shared Local Storage Topology with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/columnstore-shared-local-storage.md)[ and MariaDB ColumnStore 5](/docs/server/architecture/topologies/columnstore-shared-local-storage.md)
* [HTAP Topology with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/htap.md)[ and MariaDB ColumnStore 5](/docs/server/architecture/topologies/htap.md)
* [Single-Node ColumnStore 5 with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/single-node-topologies/enterprise-server-with-columnstore-object-storage.md)[ and Object Storage](/docs/server/architecture/topologies/single-node-topologies/enterprise-server-with-columnstore-object-storage.md)
* [Single-Node ColumnStore 5 with MariaDB Enterprise Server 10.5](/docs/server/architecture/topologies/single-node-topologies.md)

## Upgrade Instructions

* Major Release Upgrades for MariaDB ColumnStore.

<sub>*This page is: Copyright © 2025 MariaDB. All rights reserved.*</sub>

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