Can you try the patch LUCENENET-106 "Paches for v2.3.1.rar"? It contains 3 patches and a new class "WeakHashTable".
There is also another patch (WeakHashTable+FieldCacheImpl.rar) for Lucene.Net 2.1 DIGY -----Original Message----- From: Floyd Wu [mailto:[EMAIL PROTECTED] Sent: Thursday, October 09, 2008 5:00 AM To: lucene-net-user@incubator.apache.org Subject: Huge memory usage Hi all, It seems that issue, http://issues.apache.org/jira/browse/LUCENENET-106still not being fully fixed. My observation of memory usage still getting increasing. By using two profilers(YourKits profiler and MS .Net CLR Profiler), I found that "Lucene.Net.Index.SegmentReader/Norm" and "Lucene.Net.Index.FieldInfo" will be increased 41 object(both these two classes) instances when searching index(yes, sort is involved). These increased object instances won't be grabage-collected and as result my system will soon reached memory limitation and fire CLR recycle whole process. My Lucene.Net version is 2.3.1.2 and source is grab from SVN. Please help on this. Best regards, Floyd