Hi, I just "solved" an issue which I mentioned on this list many moons ago, regarding searches somehow being serialized, such that a long search would cause others to wait noticeably. Anyhow, after coding both :limit and applying homegrown thread time limit monitoring, I discovered that Searcher#search_each uses rb_thread_critical = Qtrue whereas Searcher#search doesn''t. I changed my code to use TopDocs and Searcher#search and viola, concurrent searches! Cheers, Nevill