We are integrating search_after query to our UI pagination. If we use PIT and keep the search context alive between UI page fetches, which could be minutes depending on user think time, would that scale well?. We have to support at least a few hundred concurrent users.
Also how would that affect other searches and the background ingestion process?. Documentation says lucene segment merging is impacted by open PIT contexts. We have a fairly rapidly changing large index.