Tim, The GC just automagically works right?
:) There's been issues around thread local in Lucene. The main code for core management is CoreContainer, which I believe is fairly easy to digest. If there's an issue you may find it there. Jason 2010/2/9 Tim Terlegård <tim.terleg...@gmail.com>: > If I unload the core and then click "Perform GC" in jconsole nothing > happens. The 8 GB RAM is still used. > > If I load the core again and then run the query with the sort fields, > then jconsole shows that the memory usage immediately drops to 1 GB > and then rises to 8 GB again as it caches the stuff. > > So my suspicion is that the sort cache still references all these > objects even after the core is unloaded. But somehow it knows that the > current sort cache is obsolete. After loading the core again and > executing the query with sort fields the sort cache references a new > object and the memory usage drops. > > Bug? I could check the source code, but don't know where to look. Any hints? > > /Tim > > 2010/2/9 Lance Norskog <goks...@gmail.com>: >> The 'jconsole' program lets you monitor GC operation in real-time. >> >> http://java.sun.com/developer/technicalArticles/J2SE/jconsole.html >> >> On Mon, Feb 8, 2010 at 8:44 AM, Simon Rosenthal >> <simon_rosent...@yahoo.com> wrote: >>> What Garbage Collection parameters is the JVM using ? the memory will not >>> always be freed immediately after an event like unloading a core or starting >>> a new searcher. >>> >>> 2010/2/8 Tim Terlegård <tim.terleg...@gmail.com> >>> >>>> To me it doesn't look like unloading a Solr Core frees the memory that >>>> the core has used. Is this how it should be? >>>> >>>> I have a big index with 50 million documents. After loading a core it >>>> takes 300 MB RAM. After a query with a couple of sort fields Solr >>>> takes about 8 GB RAM. Then I unload (CoreAdminRequest.unloadCore) the >>>> core. The core is not shown in /solr/ anymore. Solr still takes 8 GB >>>> RAM. Creating new cores is super slow because I have hardly any memory >>>> left. Do I need to free the memory explicitly somehow? >>>> >>>> /Tim >>>> >>> >> >> >> >> -- >> Lance Norskog >> goks...@gmail.com >> >
