I had a cluster running on Elastic Cloud and having A LOT of system / hidden / technical indices - multiple hundreds of them.
That's something I already rant about here Is there a way to clean .kibana* indices? I got 22 of them! but now I want to talk about the Entreprise Search indices.
My client enabled Entreprise Search a while ago, to test it / play with it, but never got far. A couple of month later there is 120 .ent-search indices sitting empty on the production cluster.
So of course I went to the Elastic Cloud console, and "revoked" the Entreprise Search add-on. But that does not clean the indices it created.
I wonder if that could be a feature: when you ask to remove Entreprise Search, also have the option to clean the data / index created!
120 indices means 240 shards, that's a lot to me even if they are empty.