My understanding is that an optimized index gives the best search performance. I can change my configuration to optimize the index every 24 hours. However, I still would like to know if there is a way to speed up optimization by tweaking parameters like the merge factor.
> Date: Wed, 30 Jul 2008 15:03:37 +0100 > From: [EMAIL PROTECTED] > To: java-user@lucene.apache.org > Subject: Re: Index optimization ... > > OK, but why do you need to optimize before every swap? Have you tried > with less frequent optimizes? > > -- > Ian. > > > On Wed, Jul 30, 2008 at 3:00 PM, Dragon Fly <[EMAIL PROTECTED]> wrote: > > I have two copies (active/inactive) of the index. Searches are executed > > against the "active" index and new documents get added to the "inactive" > > copy. The two indexes get swapped every 4 hours (so that new documents are > > visible to the end user). Optimization is done before the inactive copy is > > made active. > > > >> Date: Wed, 30 Jul 2008 14:54:03 +0100 > >> From: [EMAIL PROTECTED] > >> To: java-user@lucene.apache.org > >> Subject: Re: Index optimization ... > >> > >> Why do you run an optimize every 4 hours? > >> > >> > >> -- > >> Ian. > >> > >> > >> On Wed, Jul 30, 2008 at 2:46 PM, Dragon Fly <[EMAIL PROTECTED]> wrote: > >> > Perhaps I didn't explain myself clearly so please let me try it again. > >> > I'm happy with the search/indexing performance. However, my index gets > >> > fully optimized every 4 hours and the time it takes to fully optimize > >> > the index is longer than I like. Is there anything that I can do to > >> > speed up the optimization? I don't fully understand the different > >> > parameters (e.g. merge factor). If I decrease the merge factor, would > >> > it make the indexing slower (which I'm OK with) but the optimization > >> > faster? Thank you. > >> > > >> >> Date: Tue, 29 Jul 2008 08:32:46 +0200 > >> >> From: [EMAIL PROTECTED] > >> >> To: java-user@lucene.apache.org > >> >> Subject: Re: Index optimization ... > >> >> > >> >> John Griffin: > >> >> > Use IndexWriter.setRAMBufferSizeMB(double mb) and you won't have to > >> >> > sacrifice anything. It defaults to 16.0 MB so depending on the size > >> >> > of your > >> >> > index you may want to make it larger. Do some testing at various > >> >> > values to > >> >> > see where the sweet spot is. > >> >> > > >> >> > >> >> Also, have a look at > >> >> http://wiki.apache.org/lucene-java/ImproveIndexingSpeed, which provides > >> >> a range of helping advices in terms of enhanced indexing speed. > >> >> > >> >> -- > >> >> Asbjørn A. Fellinghaug > >> >> [EMAIL PROTECTED] > >> >> > >> >> --------------------------------------------------------------------- > >> >> To unsubscribe, e-mail: [EMAIL PROTECTED] > >> >> For additional commands, e-mail: [EMAIL PROTECTED] > >> >> > >> > > >> > _________________________________________________________________ > >> > With Windows Live for mobile, your contacts travel with you. > >> > http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_mobile_072008 > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: [EMAIL PROTECTED] > >> For additional commands, e-mail: [EMAIL PROTECTED] > >> > > > > _________________________________________________________________ > > With Windows Live for mobile, your contacts travel with you. > > http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_mobile_072008 > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > _________________________________________________________________ With Windows Live for mobile, your contacts travel with you. http://www.windowslive.com/mobile/overview.html?ocid=TXT_TAGLM_WL_mobile_072008
