Pregeneralized Features
Note
GeoServer does not come built-in with support for Pregeneralized Features; it must be installed through an extension.
Installing the Pregeneralized Features extension
Visit the website download page, locate your release, and download: http://sourceforge.net/projects/geoserver/files/GeoServer/2.26.1/extensions/geoserver-2.26.1-feature-pregeneralized-plugin.zip
Warning
Ensure to match plugin (example 2.26.1 above) version to the version of the GeoServer instance.
Extract the contents of the archive into the
WEB-INF/lib
directory of the GeoServer installation.
Adding a Pregeneralized Features data store
If the extension is properly installed, Generalized Data Store will be listed as an option when creating a new data store.

Generalized Data Store in the list of vector data stores
Configuring a Pregeneralized Features data store

Configuring a Pregeneralized Features data store
For a detailed description, look at the Tutorial.