> 8 queries against 1 Tomcat average 600ms per query, while 8 queries against > 8 Tomcats average 190ms per query (on a dedicated 8 CPU server w 32G RAM). > I don't see how to interpret these numbers except that Tomcat is not > multithreading as well as it should :)
Hi Michael, I think it is very natural; 8 single processes not sharing anything are faster than 8 threads sharing something. However, 600ms is too high. >My index is on a >ramfs which I've shown makes the QR and doc caches unnecessary; However, SOLR is faster than pure Lucene, try SOLR caches! (I am not sure about current version of SOLR(Lucene), but Lucene always used synchronized isDeleted() method which causes 'serialization').
