Mailing-List: contact java-user-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: java-user@lucene.apache.org
Received-SPF: pass (athena.apache.org: domain of cambazz@gmail.com designates
 64.233.166.182 as permitted sender)
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=message-id:date:from:to:subject:mime-version:content-type;
        b=hZYMUO64Xl/NalA1wEqtM2oN6+OawTIiDvFRpBmSdGWfBM2tc/tBaEZrUTvlgHwKdD
         D59oL6d8Jojre5bneFDF7HmTo/+jorGrtGuybcctRk4tXhjUS7PrHoNHQ57SyMoUVuy4
         ttRnjmZYD7y00UPWl4OG+OiBp7OYUEso4VVYg=
Message-ID: <1bcb7c7f0809040728s69ca8379he784af672ce1088c@mail.gmail.com>
Date: Thu, 4 Sep 2008 17:28:23 +0300
From: "Cam Bazz" <cambazz@gmail.com>
To: java-user@lucene.apache.org
Subject: lucene ram buffering
MIME-Version: 1.0
Content-Type: multipart/alternative;
	boundary="----=_Part_50955_17206699.1220538503892"

------=_Part_50955_17206699.1220538503892
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

hello,
I was reading the performance optimization guides then I found :
writer.setRAMBufferSizeMB()

combined with: writer.setMaxBufferedDocs(IndexWriter.DISABLE_AUTO_FLUSH);

this can be used to flush automatically so if the ram buffer size is over a
certain limit it will flush.

now the question: i would like to manage all flushes myself. yet, i still
need a large ram buffer (for search performance)

how can I set ram buffer size to a large value, yet dont use auto flush. I
just want to flush every 32 documents added - and manage that myself.

if the ram buffer size is high, but we have a small number of documents,
does lucene try to write the entire contents of the ram buffer - thus
resulting in a higher flush time?

usually in oodbms systems, you use a larger ram buffer for search, and a
smaller ram buffer for write optimization. the reason being is a smaller ram
buffer is writable to disk faster.

is that the case with lucene?

Best.
-C.B.

------=_Part_50955_17206699.1220538503892--