Mailing-List: contact java-user-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: java-user@lucene.apache.org
Received-SPF: pass (nike.apache.org: domain of simon.willnauer@googlemail.com
 designates 209.85.220.216 as permitted sender)
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=googlemail.com; s=gamma;
        h=mime-version:reply-to:in-reply-to:references:date:message-id
         :subject:from:to:content-type;
        b=MxN0rJ/T0k0kSEfgtehnXRgwTDtSWOZnI6CDAt300ij/W1lhHHs5n3WI9rz3zQjBZR
         yzZzHtcSi9aCgMjHZXs4P9POrvNy9g3+6FVCzIGSJvu9POWJuoYKm6HU8BkoERvOlvZz
         cfrp5Nub1Bn7XsnZLGP83RMQijtsBJls8P//w=
MIME-Version: 1.0
Reply-To: simon.willnauer@gmail.com
In-Reply-To: <3b5f72030910212031p6afac6abr6ac3a813bbc7de30@mail.gmail.com>
References: <3b5f72030910212031p6afac6abr6ac3a813bbc7de30@mail.gmail.com>
Date: Thu, 22 Oct 2009 09:02:37 +0200
Message-ID: <f18c9dde0910220002v6e7334favf4d22e7b052a1bc1@mail.gmail.com>
Subject: Re: 2.9 per segment searching/caching
From: Simon Willnauer <simon.willnauer@googlemail.com>
To: java-user@lucene.apache.org
Content-Type: text/plain; charset=UTF-8

Bill,
per segments search does not replace index optimisation neither it
prevents the performance degrade if your number of segments is
increasing. Depending on how your index changes it can give you a
performance improvement when reopening the index and it will certainly
prevent one or another GC if a segment did not change since last
opened. This will improve the overall performance but the general
query performance will not be improved by per seg. search.

simon

On Thu, Oct 22, 2009 at 5:31 AM, Bill Au <bill.w.au@gmail.com> wrote:
> Since Lucene 2.9 has per segment searching/caching, does query performance
> degrade less than before (2.9) as more segments are added to the index?
> Bill
>

---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-user-help@lucene.apache.org