Hello! How about some information how Garbage Collector works during the time when you have Solr unresponsive ?
-- Regards, Rafał Kuć Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch - ElasticSearch > Hello, > We were doing fine with memory, comparitively. This was in a one > hour span of load testing we did. And no out of memory exceptions > seen in the log. I have copied the memory chart here. It shows that > most of the memory was being used for cache. > Thank you > -----Original Message----- > From: Rafał Kuć [mailto:r....@solr.pl] > Sent: Tuesday, November 20, 2012 11:25 AM > To: solr-user@lucene.apache.org > Subject: Re: SOLR USING 100% percent CPU and not responding after a while > Hello! > The first thing one should ask is what is the cause of the 100% CPU > utilization. It can be an issue with the memory or your queries may > be quite resource intensive. Can you provide some more information > about your issues ? Do you see any OutOfMemory exceptions in your > logs ? How are JVM garbage collector behaving when you are > experiencing Solr being unresponsive ? > -- > Regards, > Rafał Kuć > Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch - ElasticSearch >> Hello all, >> We have solr 3.6 in a tomcat server with 16 GB memory allocated to it >> in a Linux server. It is a multicore solr and one of the core has over >> 100 million records. We have a web application that is fed by this >> solr. We don't use sharding, different cores are for different >> purposes. There are all kind of queries involved: simple queries, >> queries with filters, queries with facets, queries with pagination ( >> deep pagination as well) and a combination of them . When there are >> 100 concurrent users and quite some queries thrown to the solr the CPU >> utilization by the solr exceeds 100% and it becomes unresponsive. >> Has someone from this group have had this problem and found a >> solution. We did look at the queries from the logs and there is some >> optimization to be done there but is there anything we can do in the >> configuration. I know that there is a parameter called MergeFactor >> which can be set low in the solrconfig.xml for enabling faster >> searching but I don't see anything about CPU utilization related to >> that settings. So my question in a jest is that is there any CPU >> utilization related configuration settings for SOLR. >> Any help will be appreciated a lot >> Thank you a bunch >> Biva
