In a word, “yes”. NRTCachingDirectory almost always “does the right thing” without any modifications based on your environment.
Second, since Lucene uses MMapDirectory, the relevant portions of your index will already be in the OS’s RAM, which is why it’s a mistake to try to force it. All you’ll really do is chew up Java’s RAM to no good purpose, adding to GC etc. See: https://blog.thetaphi.de/2012/07/use-lucenes-mmapdirectory-on-64bit.html In your case, with such a small index, it’s probably already entirely in memory. Best, Erick > On Aug 18, 2020, at 4:40 AM, Tushar Arora <tarora7...@gmail.com> wrote: > > Hi, > > One of our indexes has a size of around 1GB. And the production server has > RAM of 16GB. And this is a slave server. Data replicates from the master > server to it every 5 minutes. > > Is it a good practice to keep this index in RAM? > I checked the solr.RAMDirectoryFactory. But, it does not work with > replication. So, using solr.NRTCachingDirectoryFactory is a good choice? > > Regards, > Tushar
