You say you configure 20Gb heap. What is your total physical RAM on the host? What are your cache sizes for the two collections? If you have too high cache settings you may eat too much memory..
-- Jan Høydahl, search solution architect Cominvent AS - www.cominvent.com > 27. okt. 2015 kl. 20.12 skrev SolrUser1543 <osta...@gmail.com>: > > we have a large solr cloud , with one collection and no replicas . > Each machine has one solr core . > Recently we decided to add a new collection , based on same schema , so now > each solr instance has two cores . > First collection has very big index , but the new one has only several > hundreds of documents. > > Day after we did it , we experienced very strong performance degradation, > like long query times and server unavailability. > > JVM was configured to 20GB heap , and we did not changed it during addition > of a new collection. > > The question is , how Solr manages its resources when it has more than one > core ? Does it need twice memory ? Or this degradation might be a > coincidence ? > > > > -- > View this message in context: > http://lucene.472066.n3.nabble.com/Performance-degradation-with-two-collection-on-same-sole-instance-tp4236774.html > Sent from the Solr - User mailing list archive at Nabble.com.
