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From: Adrien Grand <jpountz@gmail.com>
Date: Tue, 2 Apr 2013 18:44:03 +0200
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Subject: Re: How to use concurrency efficiently
To: java-user@lucene.apache.org
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On Tue, Apr 2, 2013 at 4:39 PM, Igor Shalyminov
<ishalyminov@yandex-team.ru> wrote:
> Yes, the number of documents is not too large (about 90 000), but the queries are very hard. Although they're just boolean, a typical query can produce a result with tens of millions of hits.

How can there be tens of millions of hits with only 90000 docs?

> Single-threadedly such a query runs ~20 seconds, which is too slow. therefore, multithreading is vital for this task.

Indeed, that's super slow. Multithreading could help a little, but
maybe there is something to do to better index your data so that
queries get faster?

--
Adrien

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