Percolation Thread Pool

Hello, I had a (hopefully quick) question regarding thread pools in Elasticsearch. I was looking at the thread pool documentation and was curious where percolation lands? I'm assuming the search thread pool but wouldn't mind a confirmation!

Please, could you clarify your question?

Sure! I'm curious which thread pool handles document percolation. Since document percolation is performed against the _search endpoint, I'm guessing it uses the search thread pool, but wanted to confirm