Separate to this discussion: We should fix the JavaDocs of IndexSearcher, that it should explain, that only the instances using Directory are costly. Creating a new IndexSearcher around an IndexReader is a neglectible cost, the important info is: "Do not recreate the IR for each search". Wrapping an IndexSearcher around an IndexReader is simply creating a new Java instance, nothing more.
----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: jchang [mailto:jchangkihat...@gmail.com] > Sent: Wednesday, January 20, 2010 2:05 AM > To: java-dev@lucene.apache.org > Subject: NRT and IndexSearcher performance > > > The javadocs for IndexSearcher in Lucene 3.0.0 read: "For performance > reasons it is recommended to open only one IndexSearcher and use it for > all > of your searches." > > However, to use NRT, it seems I have to do this for every search, which > contradicts the advice above: > IndexSearcher myIndexSearcher = new > IndexSearcher(myIndexWriter.getReader()); > > Is there any way to take advantage of NRT and not run into these > performance > problems under heavy load? > > Is the advice from the javadoc above aimed more at > IndexSearcher(org.apache.lucene.store.Directory directory)? Or is it > also > aimed at IndexSearcher(org.apache.lucene.index.IndexReader > indexReader), > which I believe I have to use to get NRT (correct me if I am wrong)? > -- > View this message in context: http://old.nabble.com/NRT-and- > IndexSearcher-performance-tp27235434p27235434.html > Sent from the Lucene - Java Developer mailing list archive at > Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-dev-h...@lucene.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org For additional commands, e-mail: java-dev-h...@lucene.apache.org
