The size is in bytes and the RAMDirectory stores the bytes in bytes, so size is equal. I would suggest to not copy the dir into a RAMdirectory. It is better to use MMapDirectory in this case, as it "swaps" the files into address space like a normal OS swap file. The OS kernel will automatically swap needed parts into physical RAM. In this case the Java Heap is not wasted and only needed parts are swapped into RAM.
----- UWE SCHINDLER Webserver/Middleware Development PANGAEA - Publishing Network for Geoscientific and Environmental Data MARUM - University of Bremen Room 2500, Leobener Str., D-28359 Bremen Tel.: +49 421 218 65595 Fax: +49 421 218 65505 http://www.pangaea.de/ E-mail: uschind...@pangaea.de > -----Original Message----- > From: Dragon Fly [mailto:dragon-fly...@hotmail.com] > Sent: Thursday, July 23, 2009 3:38 PM > To: java-user@lucene.apache.org > Subject: Loading an index into memory > > > Hi, > > I have a question regarding RAMDirectory. I have a 5 GB index on disk and > it is opened like the following: > > searcher = new IndexSearcher (new RAMDirectory (indexDirectory)); > > Approximately how much memory is needed to load the index? 5GB of memory > or 10GB because of Unicode? Does the entire index get loaded into memory > or only parts of it? Thank you. > > > _________________________________________________________________ > Windows LiveT HotmailR: Celebrate the moment with your favorite sports > pics. Check it out. > http://www.windowslive.com/Online/Hotmail/Campaign/QuickAdd?ocid=TXT_TAGLM > _WL_QA_HM_sports_photos_072009&cat=sports --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
