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From Yonik Seeley <yo...@heliosearch.com>
Subject Re: post filtering for boolean filter queries
Date Thu, 05 Dec 2013 14:49:22 GMT
On Thu, Dec 5, 2013 at 7:39 AM, Dmitry Kan <solrexpert@gmail.com> wrote:
> Thanks Erick!
> To be sure we are using cost 101 and no cache. It seems to affect on
> searches as we expected.
>
> Basically with cache on we see more "fat" spikes around commit points, as
> cache is getting flushed (we don't rerun too many entries from old cache).
> But when the post-filtering is involved, those spikes are thinner, but the
> rest of the queries take about 2 seconds longer (our queries are pretty
> heavy duty stuff).
>
> So the post-filtering gives an option of making trade-offs between query
> times for all users during normal execution and query times during commits.
> To rephrase we have 2 options:
>
> 1. Make all searches somewhat slower for all users and avoid really slow
> searches around commit points: post-filtering option
>
> OR
>
> 2. Make majority of searches really fast, but around commit points really
> slow: normal with cache option

OR

3. Use warming queries or auto-warming of caches to make all searches fast
but the commits themselves slow.

-Yonik
http://heliosearch.com -- making solr shine

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