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From Otis Gospodnetic <otis_gospodne...@yahoo.com>
Subject Re: 99.9% uptime requirement
Date Tue, 04 Aug 2009 02:36:27 GMT
Yes, daemontools or any kind of home-grown process-watching-and-restarting tool will work.
Regarding those caches - they look too large.
Also, the ramBufferSizeMB is irrelevant on search slaves.

 Otis
--
Sematext is hiring -- http://sematext.com/about/jobs.html?mls
Lucene, Solr, Nutch, Katta, Hadoop, HBase, UIMA, NLP, NER, IR



----- Original Message ----
> From: Robert Petersen <robertpe@buy.com>
> To: solr-user@lucene.apache.org
> Sent: Monday, August 3, 2009 1:46:21 PM
> Subject: RE: 99.9% uptime requirement
> 
> So then would the 'right' thing to do be to run it under something like
> Daemontools so it bounces back up on a crash?  Do any other people use
> this approach or is there something better to make it come back up?
> 
> Speaking of overly large caches, if I have solr running on a machine
> with 8GB main memory is it going to hurt to make some huge cache sizes?
> Are these settings reasonable?  With a small index I have been getting
> some great hit-rates.
> 1024
> 
> 
> initialSize="512"      autowarmCount="80"/>
> 
> initialSize="512"      autowarmCount="80"/>
> 
> initialSize="512"      autowarmCount="0"/>
> 
> Thanks
> Robi
> 
> -----Original Message-----
> From: Otis Gospodnetic [mailto:otis_gospodnetic@yahoo.com] 
> Sent: Friday, July 31, 2009 11:37 PM
> To: solr-user@lucene.apache.org
> Subject: Re: 99.9% uptime requirement
> 
> Robi,
> 
> Solr is indeed very stable.  However, it can crash and I've seen it
> crash.  Or rather, I should say I've seen the JVM that runs Solr crash.
> For instance, if you have a servlet container with a number of webapps,
> one of which is Solr, and one of which has a memory leak, I believe all
> webapps will suffer and "crash".  And even if you have just Solr in your
> servlet container, it can OOM, say if you specify overly large caches or
> too frequent commits, etc.
> 
> Otis
> --
> Sematext is hiring -- http://sematext.com/about/jobs.html?mls
> Lucene, Solr, Nutch, Katta, Hadoop, HBase, UIMA, NLP, NER, IR
> 
> 
> 
> ----- Original Message ----
> > From: Robert Petersen 
> > To: solr-user@lucene.apache.org
> > Sent: Friday, July 31, 2009 12:18:55 PM
> > Subject: 99.9% uptime requirement
> > 
> > Hi all,
> > 
> > My solr project powers almost all the pages in our site and so needs
> to
> > be up period.  My question is what can I do to ensure that happens?
> > Does solr ever crash, assuming reasonable load conditions and no
> extreme
> > index sizes?
> > 
> > I saw some comments about running solr under daemontools in order to
> get
> > an auto-restart on crashes.  From what I have seen so far in my
> limited
> > experience, solr is very stable and never crashes (so far).  Does
> anyone
> > else have this requirement and if so how do they deal with it?  Is
> > anyone else running solr under daemontools in a production site?
> > 
> > Thanks for any input you might have,
> > Robi


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