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From "MariLuz Elola" <>
Subject PrefixQuery,WildcardQuery,RangeQuery and FuzzyQuery PROBLEM
Date Wed, 13 Jul 2005 10:21:09 GMT

    I have been readed about "Too many clauses"...........   If the max was set too high,
the inefficiency would make the search unsable.
    I am testing the performance of Lucene and the time that spend Lucene in searching is
too high. Moreover I´ve got OutOfMemory error several times.....
    I am speaking about an index with 250.000 documents more or less, but in the future will
be necessary an index with millions of documents.

These are the kinds of queries:

1. Greater than or lower than request
RangeQuery with Integer.MAX_VALUE for greater than or Integer.MIN_VALUE for lower than

2. RangeQuery


        Field:[minValue to maxValue]





The problem is that PrefixQuery,WildcardQuery,RangeQuery and FuzzyQuery all expand to a series
of OR'ed boolean queries.

I have read about BitSetQuery, FilteringQuery, ConstrantScoreQuery.......... I am confused!!!!!!

I can´t use a Filter (DateFilter, QueryFilter ect...) because the client wants to search
for all the documents without filter for anything.
I can´t divide a field in subfields to do the query more specific. For example, the user
wants the date with format YYYMMDDHHMMSS, not 6 fields, one with the year, one with the month,
one with the day, one with de hour ect....
I can´t add more system resources.

My environment is the next:
----LUCENE 1.4.3-------
INDEX ==> 200.000 documents to million of documents
EACH DOCUMENT +- 20 fields (metadatas)
-----SERVER (dedicated) -------
Red Hat
2 GB Memory
jboss + lucene
JAVA_OPTS -Xmx640M -Xms640M

My question is very simple...... Is it possible to use Lucene like full text search engine
with the environment I have explained before, with the server that I have explained before,
and doing the queries that I have explained before with an efficient performance and without

Thanks in advance

                                        Mari Luz

Mari Luz Elola
Developer Engineer

Caleruega, 67
28033 Madrid (Spain)
Tel.: +34 91 768 46 58 

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