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From Michael McCandless <luc...@mikemccandless.com>
Subject Re: MultiPhraseQuery slowing down over time in Lucene 3.1
Date Tue, 03 May 2011 15:25:54 GMT
On Tue, May 3, 2011 at 7:43 AM, Tomislav Poljak <tpoljak@gmail.com> wrote:
> Hi,
>
> 2011/5/3 Michael McCandless <lucene@mikemccandless.com>:
>> I feel like we are back to Basic ;)
>>
>> If you keep running line 40 over and over on the same memory index, do
>> you see a slowdown?
>
> Yes. I've tested running same query list (~3,5 k queries) on the same
> MemoryIndex instance and after a while iterations get slower and
> slower. Same thing happens when running queries on the same instance
> of RAMDir based index holding only one doc. But, if I remove
> MultiPhraseQuery type of queries from the query list then speed of
> execution is the same, meaning execution time for other queries is
> constant and it doesn't grow over time (as it would be expected).
>
> I've tried to run tests with the latest 3.1 branch as Uwe suggested
> (checkout and built today) and slowdown is still present when
> MultiPhraseQuery type of queries are included (not removed from the
> query list).

Spooky!

Can you boil this into a contained test case?

Mike

http://blog.mikemccandless.com

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