In linux the os will cache files in ram for quick reading. You can force the into ram by doing cat filename >/dev/null
I do this with all my index files after a reboot and see better performance times on queries. Optimal ram is enough ram for all the indexes plus jvm plus 20 percent... Generally -- Jeff Courtade M: 240.507.6116 On Mon, Apr 15, 2019, 9:33 AM SOLR4189 <klin892...@yandex.ru> wrote: > Hi all, > > I have a collection with many shards. Each shard is in separate SOLR node > (VM) has 40Gb index size, 4 CPU and SSD. > > When I run performance checking with 50GB RAM (10Gb for JVM and 40Gb for > index) per node and 25GB RAM (10Gb for JVM and 15Gb for index), I get the > same queries times (percentile80, percentile90 and percentile95). I run the > long test - 8 hours production queries and updates. > > What does it mean? All index in RAM it not must? Maybe is it due to SSD? > How > can I check it? > > Thank you. > > > > -- > Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html >
