I’ve always had trouble with that advice, that RAM size should be JVM + index size. I’ve seen 300G indexes (as measured by the size of the data/index directory) run in 128G of memory.
Here’s the long form: https://lucidworks.com/post/sizing-hardware-in-the-abstract-why-we-dont-have-a-definitive-answer/ But the short form is “stress test and see”. To answer your question, though, when people say “index size” they’re usually referring to the size on disk as I mentioned above. Best, Erick > On Feb 3, 2020, at 4:24 AM, Mohammed Farhan Ejaz <farhan.e...@gmail.com> > wrote: > > Hello All, > > I want to size the RAM for my Solr cloud instance. The thumb rule is your > total RAM size should be = (JVM size + index size) > > Now I have a simple question, How do I know my index size? A simple method, > perhaps from the Solr cloud admin UI or an API? > > My assumption so far is the total segment info size is the same as the > index size. > > Thanks & Regards > Farhan
