-----Original Message----- From: gurudev [mailto:[EMAIL PROTECTED] Sent: Thursday, May 22, 2008 7:28 AM To: solr-user@lucene.apache.org Subject: RE: SOLR OOM (out of memory) problem
Hi Rong, My cache hit ratio are: filtercache: 0.96 documentcache:0.51 queryresultcache:0.58 Thanx Pravesh Yongjun Rong-2 wrote: > > I had the same problem some weeks before. You can try these: > 1. Check the hit ratio for the cache via the solr/admin/stats.jsp. If > the hit ratio is very low. Just disable those cache. It will save you > some memory. > 2. set -Xms and -Xmx to the same size will help improve GC performance. > 3. Check what's GC do you use? Default will be parallel. You can try > use concurrent GC which will help a lot. > 4. This is my sun hotspot jvm startup options: -XX:+UseConcMarkSweepGC > -XX:CMSInitiatingOccupancyFraction=50 -XX:-UseGCOverheadLimit The > above cannot solve the OOM forever. But they help a lot. > Wish this can help. > > -----Original Message----- > From: Mike Klaas [mailto:[EMAIL PROTECTED] > Sent: Wednesday, May 21, 2008 2:23 PM > To: solr-user@lucene.apache.org > Subject: Re: SOLR OOM (out of memory) problem > > > On 21-May-08, at 4:46 AM, gurudev wrote: > >> >> Just to add more: >> >> The JVM heap allocated is 6GB with initial heap size as 2GB. We use >> quadro(which is 8 cpus) on linux servers for SOLR slaves. >> We use facet searches, sorting. >> document cache is set to 7 million (which is total documents in >> index) > >> filtercache 10000 > > You definitely don't have enough memory to keep 7 million document, > fully realized in java-object form, in memory. > > Nor would you want to. The document cache should aim to keep the most > frequently-occuring documents in memory (in the thousands, perhaps > 10's of thousands). By devoting more memory to the OS disk cache, > more of the 12GB index can be cached by the OS and thus speed up all > document retreival. > > -Mike > > -- View this message in context: http://www.nabble.com/SOLR-OOM-%28out-of-memory%29-problem-tp17364146p17 402234.html Sent from the Solr - User mailing list archive at Nabble.com.
