For simple removing deletes, there is also IW.expungeDeletes(), which is less intensive! Not sure if solr support this, too, but as far as I know there is an issue open.
Also please note: As soon as one segment is selected for merging (the merge policy may also do this dependent on the number of deletes in a segment), it will reclaim all deleted ressources - that's what merging does. So expunging deletes once per week is a good idea, if your index consists of very old and large segments that are rarely merged anymore and lots of documents are deleted from them. ----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Erick Erickson [mailto:erickerick...@gmail.com] > Sent: Tuesday, June 14, 2011 3:19 PM > To: dev@lucene.apache.org > Subject: Re: Indexing slower in trunk > > Optimization used to have a very noticeable impact on search speed prior to > some index format changes from quite a while ago. > > At this point the effect is much less noticeable, but the thing optimize does > do is reclaim resources from deleted documents. If you have lots of > deletions, it's a good idea to periodically optimize, but in that case it's often > done pretty infrequently (once a > day/week/month) rather than as part of any ongoing indexing process. > > Best > Erick > > 2011/6/14 Yury Kats <yuryk...@yahoo.com>: > > On 6/14/2011 4:28 AM, Uwe Schindler wrote: > >> indexing and optimizing was only a > >> good idea pre Lucene-2.9, now it's mostly obsolete) > > > > Could you please elaborate on this? Is optimizing obsolete in general > > or after indexing new documents? Is it obsolete after deletions? And > > what it "mostly"? > > > > Thanks! > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For > > additional commands, e-mail: dev-h...@lucene.apache.org > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional > commands, e-mail: dev-h...@lucene.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org
