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From Ivan Liu <javaca...@gmail.com>
Subject Re: Indexing and Searching fields that have unique values
Date Sat, 24 Apr 2010 14:11:16 GMT
I think Anshum is right。
And may your range is too big and is sorting


2010/4/23 Anshum <anshumg@gmail.com>

> Hi Ravi,
>
> Adding to what Erick said, you could do index the numbers as numeric fields
> instead of strings. This should improve things for you by a considerable
> amount.
> P.S: I'm talking with my knowledge on Java Lucene.
> --
> Anshum Gupta
> Naukri Labs!
> http://ai-cafe.blogspot.com
>
> The facts expressed here belong to everybody, the opinions to me. The
> distinction is yours to draw............
>
>
> On Fri, Apr 23, 2010 at 1:43 AM, Erick Erickson <erickerickson@gmail.com
> >wrote:
>
> > You have to provide more info, especially the search code you're
> > using. How many documents in your index? What are you measuring?
> >
> > Anything else you can think of that might help people diagnose
> > your issue.
> >
> > Also, consider asking on the .Net user's list.
> >
> > Known things to look for (in Java).
> > 1> Are you re-opening an index reader each time? Don't
> > 2> Are you sorting? If so, the first querie(s) will fill internal
> >   caches, this takes time. Time subsequent searches.
> >
> > HTH
> > Erick
> >
> > On Thu, Apr 22, 2010 at 3:58 PM, Ravi Patel <rpatel4@live.com> wrote:
> >
> > >
> > >
> > >
> > > Using Lucene.Net
> > >
> > >
> > >
> > > I've built an index of documents.
> > >
> > >
> > >
> > > The documents also have a unique identifier (my identifier, not the
> > lucene
> > > index's id).
> > >
> > > The unique identifers are also a sort order of new-ness (higher id
> values
> > > are newer)
> > >
> > >
> > >
> > > string my_id ="1234"
> > >
> > > doc.Add(new Field("id", my_id, Field.Store.YES,
> > Field.Index.UN_TOKENIZED));
> > >
> > >
> > >
> > > Searching for a particular id, or range searches are incredibly slow
> > >
> > >
> > >
> > >
> > >
> > > TermQuery query = new TermQuery(new Term("id", "1234"));
> > >
> > > searcher.Search(query)
> > >
> > >
> > >
> > >
> > >
> > > Any tips on how to speed up such an search?
> > >
> > >
> > >
> > > I'm also doing RangeSearches on lower / upper ids, and those are slow
> too
> > >
> > > _________________________________________________________________
> > > The New Busy is not the too busy. Combine all your e-mail accounts with
> > > Hotmail.
> > >
> > >
> >
> http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_4
> >
>



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