> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/plugins/other-plugins/mhnsw.md).

# mhnsw

{% hint style="info" %}
This plugin is for internal use only.
{% endhint %}

This plugin implements the `nhnsw` vector index algorithm. It is used to create vector indexes.

See [Vector Overview](/docs/server/reference/sql-structure/vectors/vector-overview.md) for the functionality, and [Vector System Variables](/docs/server/reference/sql-structure/vectors/vector-system-variables.md) for what you can configure.

It is built in the server, and is always enabled.

For plugin version and maturity level, see [this page](/docs/server/reference/plugins/list-of-plugins.md).