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Posted to solr-user@lucene.apache.org by Phillip Farber <pf...@umich.edu> on 2008/10/08 23:34:58 UTC

Practical number of Solr instances per machine

Hello everyone,

What is the generally accepted number of solr instances it makes sense 
to run on a single machine given solr/lucene threading? Servers now 
commonly have 4 or 8 cpus.  Obviously the more instances you run the 
bigger your JVM heap needs to be and that takes away from OS cache.  Is 
the  sweet spot just one instance per machine?  What is the right way to 
think about this issue?

Thanks,

Phil