On 10/17/06, vasu shah <[EMAIL PROTECTED]> wrote:
Can anyone please tell as to what is the difference between PrefixFilter and
WildcardQuery as far as memory is concerned?
I saw the code of PrefixFilter and it gets TermEnum for all the terms in the
index. Won't this consume memory??
It takes time, not memory. TermEnum is like an iterator - it doesn't
keep everything it iterates over in memory. The memory for filters
will be for the bitset (1 bit for every document in the index, so a 1M
doc index will take 125KB of mem per filter).
Both PrefixQuery and PrefixFilter need to use a TermEnum, the
difference is what they do with the resulting terms.
-Yonik
http://incubator.apache.org/solr Solr, the open-source Lucene search server
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