The only thing that comes to mind is running Solr under a profiler (e.g. YourKit) and figuring out which objects are not getting cleaned up and who's holding references to them.
Otis -- Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch ----- Original Message ---- > From: David Baker <dav...@mate1inc.com> > To: solr-user@lucene.apache.org > Sent: Thursday, April 16, 2009 6:40:31 PM > Subject: Re: Garbage Collectors > > Otis Gospodnetic wrote: > > Personally, I'd start from scratch: > > -Xmx.... -Xms... > > > > -server is not even needed any more. > > > > If you are not using Java 1.6, I suggest you do. > > > > Next, I'd try to investigate why objects are not being cleaned up - this > should not be happening in the first place. Is Solr the only webapp running? > > > > > > Otis > > -- > > Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch > > > > > > > > ----- Original Message ---- > > > >> From: David Baker > >> To: solr-user@lucene.apache.org > >> Sent: Thursday, April 16, 2009 3:33:18 PM > >> Subject: Garbage Collectors > >> > >> I have an issue with garbage collection on our solr servers. We have an > issue where the old generation never gets cleaned up on one of our > servers. > This server has a little over 2 million records which are updated every hour > or > so. I have tried the parallel GC and the concurrent GC. The parallel seems > more stable for us, but both end up running out of memory. I have increased > the > memory allocated to the servers, but this just seems to delay the problem. > My > question is, what are the suggested options for using the parallel GC. > Currently we are using something of this nature: > >> > >> -server -Xmx4096m -Xms512m -XX:+UseAdaptiveSizePolicy > >> -XX:+UseParallelOldGC > -XX:GCTimeRatio=19 -XX:NewSize=128m -XX:SurvivorRatio=2 > -Dsolr.solr.home=/usr/local/solr-tomcat-fi/solr > >> > >> I am new to solr and GC tuning, so any advice is appreciated. > >> > Thanks for the reply, yes, solr is the only app running under this tomcat > server. I will remove -server, and other options except the heap allocation > options and see how it performs. Any suggestions on how to go about finding > out > why objects are not being cleaned up if these changes dont work?
