Re: Some guidance on memory requirements/usage/tuning

2015-06-30 Thread Alessandro Benedetti
Am I wrong or the current type of default IndexDirectory is the "NRTCachingDirectoryFactory" since Solr 4.x ? If I remember well this Factory is creating a Directory implementation built on top of a "MMapDirectory". In this case we should rely on the Memory Mapping Operative System feature to prope

Re: Some guidance on memory requirements/usage/tuning

2015-06-30 Thread Erick Erickson
bq: The type of queries that are run can return anything from 1 million to 9.5 million documents, and typically run for anything from 20 to 45 minutes. Uhhh, are you literally setting the &rows parameter to over 9.5M and getting that many docs all at once? Or is that just numFound and you're _real

Re: Some guidance on memory requirements/usage/tuning

2015-06-30 Thread Toke Eskildsen
On Tue, 2015-06-30 at 16:39 +1000, Caroline Hind wrote: > We have very recently upgraded from SOLR 4.1 to 5.2.1, and at the same > time increased the physical RAM from 24Gb to 96Gb. We run multiple > cores on this one server, approximately 20 in total, but primarily we > have one that is huge in co