This engine makes use of the advanced capabilities of PostgreSQL to provide a "good enough" search solution.
You must be running Wiki.js using a PostgreSQL database in order to use this engine!
The pg_trgm extension must be enabled on the PostgreSQL for this engine to function correctly. It is enabled by default on most installations, but if that's not the case, you can enable it by running:
CREATE EXTENSION pg_trgm;
The extension has to be activated per database so make sure to enable it for your Wiki.js database.
Note that if you already have content in your wiki, you must click on Rebuild Index afterwards to import all your existing content into the search engine. Any change (new, edit, delete page) will be handled automatically from this point forward.