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From Dave <hastings.recurs...@gmail.com>
Subject Re: Phrase Fields performance
Date Sat, 01 Apr 2017 15:13:27 GMT
Maybe commongrams could help this but it boils down to speed/quality/cheap. Choose two. Thanks

> On Apr 1, 2017, at 10:28 AM, Shawn Heisey <apache@elyograg.org> wrote:
> 
>> On 3/31/2017 1:55 PM, David Hastings wrote:
>> So I un-commented out the line, to enable it to go against 6 important
>> fields. Afterwards through monitoring performance I noticed that my
>> searches were taking roughly 50% to 100% (2x!) longer, and it started
>> at the exact time I committed that change, 1:40 pm, qtimes below in a
>> 15 minute average cycle with the start time listed. 
> 
> That is fully expected.  Using both pf and qf basically has Solr doing
> the exact same queries twice, once as specified on fields in qf, then
> again as a phrase query on fields in pf.  If you add pf2 and/or pf3, you
> can expect further speed drops.
> 
> If you're sorting by relevancy, using pf with higher boosts than qf
> generally will make your results better, but it comes at a cost in
> performance.
> 
> Thanks,
> Shawn
> 

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