have you tried to only collect doc-ids and see if the speed problem is there,
or maybe to fetch only field values? If you have dense results it can easily be
split() or addSymbolsToHash() what takes the time.
I see 3 possibilities what could be slow, getting doc-ids, fetching field
value or doing something with this value
Would be interesting to know what you get here
yeah, I know, it sounds to naive, but sometimes repeting the obvious helps
----- Original Message ----
From: Ryan O'Hara <[EMAIL PROTECTED]>
To: java-user@lucene.apache.org
Sent: Friday, 21 July, 2006 8:43:41 PM
Subject: Fastest Method for Searching (need all results)
My index contains approximately 5 millions documents. During a
search, I need to grab the value of a field for every document in the
result set. I am currently using a HitCollector to search. Below is
my code:
searcher.search(query, new HitCollector(){
public void collect(int doc, float score){
if(searcher.doc(doc).get("SYM") !=
null){
addSymbolsToHash(searcher.doc
(doc).get("SYM").split("ENDOFSYM"));
}
}
});
This is fairly fast for small and medium-sized result sets. However,
it gets slow as the result set grows. I read this on HitCollector's
API page:
"For good search performance, implementations of this method should
not call Searcher.doc(int) or Reader.document(int) on every document
number encountered. Doing so can slow searches by an order of
magnitude or more."
Along with this implementation, I've also tried using FieldCache.
This faired better with large-sized result sets, but worse with small
and medium-sized result sets. Anyone have any ideas of what the best
approach might be?
Thanks a lot,
Ryan
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
