Re: Noticed performance degrade from lucene-7.5.0 to lucene-8.0.0

[Brandon Miller]

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On Sun, Apr 14, 2019 at 9:23 AM Khurram Shehzad 
wrote:

> Hi All,
>
> I have recently updated from lucene-7.5.0 to lucene-8.0.0. But I noticed
> considerable performance degrade. Queries that used to be executed in 18 to
> 24 milliseconds now taking 74 to 110 milliseconds.
>
> Any suggestion please?
>
> Regards,
> Khurram
>


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Re: Noticed performance degrade from lucene-7.5.0 to lucene-8.0.0

[Uwe Schindler]

Without further information we can't help here. So we would need the type of 
queries (conjunction, disjunction, phrase,...). There are significant changes 
which may cause some queries to be slower, but others like 50 times faster if 
the exact number of results are not needed, see 
https://www.elastic.co/blog/faster-retrieval-of-top-hits-in-elasticsearch-with-block-max-wand

Uwe

Am April 14, 2019 2:22:59 PM UTC schrieb Khurram Shehzad :
>Hi All,
>
>I have recently updated from lucene-7.5.0 to lucene-8.0.0. But I
>noticed considerable performance degrade. Queries that used to be
>executed in 18 to 24 milliseconds now taking 74 to 110 milliseconds.
>
>Any suggestion please?
>
>Regards,
>Khurram

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Uwe Schindler
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https://www.thetaphi.de