Noticed performance degrade from lucene-7.5.0 to lucene-8.0.0

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Noticed performance degrade from lucene-7.5.0 to lucene-8.0.0

Khurram Shehzad-2
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 <[hidden email]>:

>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

--
Uwe Schindler
Achterdiek 19, 28357 Bremen
https://www.thetaphi.de
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Re: Noticed performance degrade from lucene-7.5.0 to lucene-8.0.0

Brandon Miller
In reply to this post by Khurram Shehzad-2
unsubscribe

On Sun, Apr 14, 2019 at 9:23 AM Khurram Shehzad <[hidden email]>
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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