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From Yura Smolsky <i...@altervision.biz>
Subject Re[2]: sorted search
Date Thu, 24 Feb 2005 18:52:02 GMT
Hello, Erik.

about memory usage...
DateField takes string of 9 bytes in memory ('000ic64p7')
How much memory will be taken by this string?

How much memory will be taken by integer?

EH> Sorting by String uses up lots more RAM than a numeric sort.  If you
EH> use a numeric (yet lexicographically orderable) date format (e.g. 
EH> YYYYMMDD) you'll see better performance most likely.

EH>         Erik


EH> On Feb 24, 2005, at 1:01 PM, Yura Smolsky wrote:

>> Hello, lucene-user.
>>
>> I have index with many documents, more than 40 Mil.
>> Each document has DateField (It is time stamp of document)
>>
>> I need the most recent results only. I use single instance of 
>> IndexSearcher.
>> When I perform sorted search on this index:
>>       Sort sort = new Sort();
>>       sort.setSort( new SortField[] { new SortField ("modified", 
>> SortField.STRING, true) } );
>>       Hits hits =
>>         searcher.search(QueryParser.parse("good", "content",
>>                                           StandardAnalyzer()), sort);
>>
>> then search speed is not good.
>>
>> Today I have tried search without "sort by modified", but with sort by
>> Relevance. Speed was much better!
>>
>> I think that Sort by DateField is very slow. Maybe I do something
>> wrong about this kind of sorted search? Can you give me advices about
>> this?
>>
>> Thanks.
>>
>> Yura Smolsky.
>>
>>
>>
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Yura Smolsky.



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