Nevermind. I see advance wasn't around in 2.4. This is part of the
DocIdSetIterator changes.
Anyway - either these are just not comparable runs, or there is a major
bug (which seems unlikely).
Just to keep pointing out the obvious:
2.4 calls doc 195,000 times
2.9 calls docId 1.4 million times
That just doesn't jive.
Mark Miller wrote:
> Notice that while DisjunctionScorer.advance and
> DisjuntionScorer.advanceAfterCurrent appear to be called
> in 2.9, in 2.4, I am only seeing DisjuntionScorer.advanceAfterCurrent
> called.
>
> Can someone explain that?
>
> Mark Miller wrote:
>
>> Something is very odd about this if they both cover the same search and
>> the environ for both is identical. Even if one search was done twice,
>> and we divide the numbers for the new api by 2 - its still *very* odd.
>>
>> With 2.4, ScorerDocQueue.topDoc is called half a million times.
>> With 2.9, its called over 4 million times.
>>
>> Huh?
>>
>> Thomas Becker wrote:
>>
>>
>>> No it's only a single segment. But two calls. One doing a getHitsCount
>>> first and
>>> the other doing the actual search. I'll paste both methods below if
>>> someone's
>>> interested.
>>>
>>> Will dig into lucene's sources and compare 2.4 search behaviour for my case
>>> with
>>> 2.9 tomorrow. It was about time to get more into lucene-core sources
>>> anyhow. :)
>>>
>>> See you tomorrow guys and thanks a lot again! It's a pleasure.
>>>
>>> public int getHitsCount(String query, Filter filter) throws
>>> LuceneServiceException {
>>> log.debug("getHitsCount('{}, {}')", query, filter);
>>> if (StringUtils.isBlank(query)) {
>>> log.warn("getHitsCount: empty lucene query");
>>> return 0;
>>> }
>>> long startTimeMillis = System.currentTimeMillis();
>>> int count = 0;
>>>
>>> if (indexSearcher == null) {
>>> return 0;
>>> }
>>>
>>> BooleanQuery.setMaxClauseCount(MAXCLAUSECOUNT);
>>> Query q = null;
>>> try {
>>> q = createQuery(query);
>>> TopScoreDocCollector tsdc =
>>> TopScoreDocCollector.create(1, true);
>>> indexSearcher.search(q, filter, tsdc);
>>> count = tsdc.getTotalHits();
>>> log.info("getHitsCount: count = {}",count);
>>> } catch (ParseException ex) {
>>> throw new LuceneServiceException("invalid lucene
>>> query:" + query, ex);
>>> } catch (IOException e) {
>>> throw new LuceneServiceException(" indexSearcher could
>>> be corrupted", e);
>>> } finally {
>>> long durationMillis = System.currentTimeMillis() -
>>> startTimeMillis;
>>> if (durationMillis > slowQueryLimit) {
>>> log.warn("getHitsCount: Slow query: {} ms,
>>> query={}", durationMillis, query);
>>> }
>>> log.debug("getHitsCount: query took {} ms",
>>> durationMillis);
>>> }
>>> return count;
>>> }
>>>
>>> public List<Document> search(String query, Filter filter, Sort sort,
>>> int from,
>>> int size) throws LuceneServiceException {
>>> log.debug("{} search('{}', {}, {}, {}, {})", new Object[] {
>>> indexAlias, query,
>>> filter, sort, from, size });
>>> long startTimeMillis = System.currentTimeMillis();
>>>
>>> List<Document> docs = new ArrayList<Document>();
>>> if (indexSearcher == null) {
>>> return docs;
>>> }
>>> Query q = null;
>>> try {
>>> if (query == null) {
>>> log.warn("search: lucene query is null...");
>>> return docs;
>>> }
>>> q = createQuery(query);
>>> BooleanQuery.setMaxClauseCount(MAXCLAUSECOUNT);
>>> if (size < 0 || size > maxNumHits) {
>>> // set hard limit for numHits
>>> size = maxNumHits;
>>> if (log.isDebugEnabled())
>>> log.debug("search: Size set to
>>> hardlimit: {} for query: {} with filter:
>>> {}", new Object[] { size, query, filter });
>>> }
>>> TopFieldCollector collector =
>>> TopFieldCollector.create(sort, size + from,
>>> true, false, false, true);
>>> indexSearcher.search(q, filter, collector);
>>> if(size > collector.getTotalHits())
>>> size = collector.getTotalHits();
>>> if (size > 100000)
>>> log.info("search: size: {} bigger than 100.000
>>> for query: {} with filter:
>>> {}", new Object[] { size, query, filter });
>>> TopDocs td = collector.topDocs(from, size);
>>> ScoreDoc[] scoreDocs = td.scoreDocs;
>>> for (ScoreDoc scoreDoc : scoreDocs) {
>>> docs.add(indexSearcher.doc(scoreDoc.doc));
>>> }
>>> } catch (ParseException e) {
>>> log.warn("search: ParseException: {}", e.getMessage());
>>> if (log.isDebugEnabled())
>>> log.warn("search: ParseException: ", e);
>>> return Collections.emptyList();
>>> } catch (IOException e) {
>>> log.warn("search: IOException: ", e);
>>> return Collections.emptyList();
>>> } finally {
>>> long durationMillis = System.currentTimeMillis() -
>>> startTimeMillis;
>>> if (durationMillis > slowQueryLimit) {
>>> log.warn("search: Slow query: {} ms, query={},
>>> indexUsed={}",
>>> new Object[] { durationMillis,
>>> query,
>>> indexSearcher.getIndexReader().directory() });
>>> }
>>> log.debug("search: query took {} ms", durationMillis);
>>> }
>>> return docs;
>>> }
>>>
>>>
>>> Uwe Schindler wrote:
>>>
>>>
>>>
>>>>>> http://ankeschwarzer.de/tmp/lucene_29_newapi_mmap_singlereq.png
>>>>>>
>>>>>> Have to verify that the last one is not by accident more than one
>>>>>>
>>>>>>
>>>>>>
>>>>> request.
>>>>>
>>>>>
>>>>>
>>>>>> Will
>>>>>> do the run again and then post the required info.
>>>>>>
>>>>>>
>>>>>>
>>>>> The last figure shows, that IndexSearcher.searchWithFilter was called
>>>>> twice
>>>>> in contrast to the first figure, where IndexSearcher.search was called
>>>>> only
>>>>> once.
>>>>>
>>>>>
>>>>>
>>>> I forgot, searchWithFilter it is called per segment in 2.9. If it was only
>>>> one search, you must have two segments and therefore no optimized index for
>>>> this to be correct?
>>>>
>>>> Uwe
>>>>
>>>>
>>>> ---------------------------------------------------------------------
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>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>
>
>
--
- Mark
http://www.lucidimagination.com
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