[Koha-devel] Search speed

[Tomas Cohen Arazi]

Paul, while you are running your tests, could you please compare this both
scenarios:

- <use_zebra_facets>1</use_zebra_facets>
- <use_zebra_facets>0</use_zebra_facets>

Thanks

PS: I have found that searchResults is too slow too.

El Fri Jan 30 2015 at 19:34:41, Paul A (<paul.a at navalmarinearchive.com>)
escribió:

> At 04:53 PM 1/30/2015 -0500, Mark Tompsett wrote:
> >Greetings,
> >
> >If there is no negative effect, and only positive effects, I'd be more
> >than willing to submit a patch to default with a -T. :)
>
> I'm looking for "negatives" right now. Give me another little while, and
> I'll do a bug/enhancement myself with all the numbers (a bit of a struggle,
> NYTProf doesn't appear to like multi-threading.)
>
> Best -- Paul
>
>
> >GPML,
> >Mark Tompsett
> >
> >-----Original Message----- From: Paul A
> >Sent: Friday, January 30, 2015 3:19 PM
> >To: Fridolin SOMERS ; koha-devel at lists.koha-community.org
> >Subject: Re: [Koha-devel] Search speed
> >
> >At 05:40 PM 1/30/2015 +0100, Fridolin SOMERS wrote:
> >>You can launch Zebra multi-threaded using :
> >>zebrasrv -T
> >
> >Fridolin - merci mille fois -- first impressions are most positive.  I'll
> >try and find time later today to quantify the results and put them in
> >context of my previous tests.
> >
> >[vi /usr/share/koha/bin/koha-zebra-ctl.sh line 40 to ZEBRAOPTIONS="-T -v
> >none,fatal,warn"]
> >
> >J'aurais bien aimer trouver ça tout seul ... mais encore une fois avec mes
> >remerciments.
> >
> >Meilleures amitiés et a+
> >Paul
> >
> >
> >>Le 30/01/2015 02:59, Robin Sheat a écrit :
> >>>Paul A schreef op do 29-01-2015 om 19:39 [-0500]:
> >>>>Facets appear to have a huge overhead in various components of Zebra,
> >>>>to
> >>>>the point where a single core of a multiple processor CPU gets
> >>>>overwhelmed,
> >>>>but does not share the load with other totally idle cores.
> >>>
> >>>That's not how multiprocessor systems work.
> >>>
> >>>They can only spread load amongst other cores if the software is
> >>>multithreaded/multiprocess, which I suspect zebra isn't, at least within
> >>>a single request. If it does all its work in a single thread, then it
> >>>can't spread across multiple cores.
> >>>
> >>>>Intel tell me
> >>>>that this is not fixable through any hardware/BIOS config and they are
> >>>>not
> >>>>aware of a Linux "standard library" that deals with processor
> >>>>affinity.  I've searched around a little and found mentions for c and
> >>>>FORTRAN (marvelous old memories for me!) but so far nothing totally
> >>>>specific for Perl.
> >>>
> >>>Zebra is not Perl, zebra is (I think) C. But still, unless it's written
> >>>with multithreading in mind, you can't do anything about it.
> >>>>
> >>>>taskset and sched_setaffinity might be usable at system
> >>>>level
> >>>
> >>>Unless you have very specific use cases (which you don't), these won't
> >>>help.
> >>>>
> >>>>, and I might have a look at pthread_setaffinity_np.3.gz
> >>>
> >>>That will only help if you plan on rewriting zebra to use pthreads.
> >>>
> >>>I don't recommend rewriting zebra.
> >>>
> >>>
> >>>
> >>>_______________________________________________
> >>>Koha-devel mailing list
> >>>Koha-devel at lists.koha-community.org
> >>>http://lists.koha-community.org/cgi-bin/mailman/listinfo/koha-devel
> >>>website : http://www.koha-community.org/
> >>>git : http://git.koha-community.org/
> >>>bugs : http://bugs.koha-community.org/
> >>
> >>--
> >>Fridolin SOMERS
> >>Biblibre - Pôles support et système
> >>fridolin.somers at biblibre.com
> >>_______________________________________________
> >>Koha-devel mailing list
> >>Koha-devel at lists.koha-community.org
> >>http://lists.koha-community.org/cgi-bin/mailman/listinfo/koha-devel
> >>website : http://www.koha-community.org/
> >>git : http://git.koha-community.org/
> >>bugs : http://bugs.koha-community.org/
> >
> >---
> >Maritime heritage and history, preservation and conservation,
> >research and education through the written word and the arts.
> ><http://NavalMarineArchive.com> and <http://UltraMarine.ca>
> >
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> >http://lists.koha-community.org/cgi-bin/mailman/listinfo/koha-devel
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>
> ---
> Maritime heritage and history, preservation and conservation,
> research and education through the written word and the arts.
> <http://NavalMarineArchive.com> and <http://UltraMarine.ca>
>
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