I just happened to be looking into this as well. I assume you've seen the refguide documentation: https://solr.apache.org/guide/8_11/query-settings-in-solrconfig.html#user-defined-caches
Normally one would not configure a user-defined cache except in support of other custom plugins/components. e.g., if you have a custom Query/QueryParser implementation that could internally benefit from specialized caching strategies or something, in Query.createWeight(...) you could cast the provided IndexSearcher to a SolrIndexSearcher (a safe cast in most contexts), and use the SolrIndexSearcher to interact with your custom cache by name. Sorry if the response is a bit vague, I hope it's helpful nonetheless! If you share more specifically what you're trying to do, this thread could _become_ a discussion of a (theoretically) working example of user-defined cache :-) On Tue, Feb 15, 2022 at 2:42 PM rbs <rbs4...@gmail.com> wrote: > Hi, > > I've looked and googled, but I have been unable to actually find a working > example of User Defined Caches. > > > > I looking for something showing the basics how to define, implement and use > as User Defined Cache. > > > > Is there one out there and I have just missed it?? > > > > Thanks > >