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Date: Tue, 25 Mar 2008 12:32:28 -0700 (PDT)
From: Chris Hostetter <hossman_lucene@fucit.org>
To: java-user@lucene.apache.org
Subject: Re: Improving Index Search Performance
In-Reply-To: <fa7518640803250543i6c1a5a81x2ea0ddb584576ff5@mail.gmail.com>
Message-ID: <Pine.LNX.4.62.0803251230270.18471@radix.cryptio.net>
References: <fa7518640803250543i6c1a5a81x2ea0ddb584576ff5@mail.gmail.com>
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: *We also read in one of the posts that we should use bitSet.set(doc)
: instead of calling searcher.doc(id). But we are unable to to understand how
: this might help in our case since we will anyway have to load the document
: to get the other required field(company_id). Also we observed that the
: searcher is actually using only 1G RAM though we have 4G allocated to it.

in addition to Paul's previous excellent suggestion, note that if:
  * companyId is a single value field (ie: no document has more then one)
  * companyId is indexed

you can use the FieldCache to lookup the compnayId for each doc.  on the 
aggregate this will most likely be much faster then accessing the stored 
fields.


-Hoss


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