Otis, you have a good memory :-) I guess the main thing that prompted
my question me was Mike Klass' statement that he runs 2 instance per
machine to "squeeze" performance out of the box. That raised the
question in my mind as to just how this could benefit performance over a
single instance in one box.
Phil
Otis Gospodnetic wrote:
Hi,
Did you not ask this question a while back? I may be mixing things... (hah,
no, just checked)
In short, it depends on a number of factors, such as index sizes, query rates,
complexity of queries, amount of RAM, your target query latency, etc. etc. So
there is no super clear cut answer. If you have some concrete numbers, that
will be easier to answer :)
Otis
--
Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch
----- Original Message ----
From: Phillip Farber <[EMAIL PROTECTED]>
To: solr-user@lucene.apache.org
Sent: Wednesday, October 8, 2008 5:34:58 PM
Subject: 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
