Hello, Why are you forcing NIOFSDirectory instead of using Lucene's defaults via FSDirectory#open? I wonder if this might contribute to the slowdown you are seeing given that access to the terms index tends to be a bit random.
It's very unlikely we'll add back a toggle for this as there is no point in holding the terms index in JVM heap when it could live in the OS cache instead. On Thu, Apr 8, 2021 at 7:57 AM Никита Михайлов <mihaylovniki...@gmail.com> wrote: > Hi. I noticed that after the upgrade from Lucene8.5.x to Lucene >=8.6, > search became slower(example TopScoreDocCollector became 20-30% slower, > from ElasticSearch - 50%). > > While testing, I realized that it happened after LUCENE-9257(commit > e7a61ea). Bug or feature? Can add settings for isOffHeep? To make the > developer explicitly make this choice > > Added a file that shows a simple demo that the search is slow > Need to run on commit e7a61ea and 90aced5, you will notice how the speed > drops to 30% > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org -- Adrien
