26 Aug
2014
26 Aug
'14
9:33 a.m.
This Query looks much like it is generated by the tag service when searching
for documents with a given tag (the code is in class TagQueryUtils, method
getDocumentsWithTag, in the xwiki-platform-core/xwiki-platform-tag/xwiki-platform-tag-api
module)
This query might be triggered by any kind of UI element (Panel, macro etc.)
I do not think it is used to update any search index or the like.
Instead it is used on some pages, e.g. Main.Tags when clicking on a tag to see its list
of documents.
I wonder why this query takes so long. Even a 100K docs should not be that much
(I mean, 5 minutes query time, huh?) Is there any chance some binary data of the movie
objects or the like ended up in the xwikilistitems table or any other table used in the
query?
Clemens
Hello,
As I mentioned, I discovered that the queries that are hogging my DB are
similar to:
'102', 'xwiki', 'localhost:52614', 'xwiki',
'Query', '372', 'Creating sort
index', 'select xwikidocum0_.XWD_FULLNAME as col_0_0_ from xwikidoc
xwikidocum0_ cross join xwikiobjects baseobject1_ cross join xwikilists
dbstringli2_ inner join xwikiproperties dbstringli2_1_ on
dbstringli2_.XWL_ID=dbstringli2_1_.XWP_ID and
dbstringli2_.XWL_NAME=dbstringli2_1_.XWP_NAME inner join xwikilistitems
list3_ on dbstringli2_.XWL_ID=list3_.XWL_ID and
dbstringli2_.XWL_NAME=list3_.XWL_NAME where (xwikidocum0_.XWD_HIDDEN<>1 oy
xwikidocum0_.XWD_HIDDEN is null) and
baseobject1_.XWO_CLASSNAME=\'XWiki.TagClass\' and
baseobject1_.XWO_NAME=xwikidocum0_.XWD_FULLNAME and
baseobject1_.XWO_ID=dbstringli2_.XWL_ID and dbstringli2_.XWL_NAME=\'tags\'
and lower(list3_.XWL_VALUE)=lower(\'shock-rock\') order by
xwikidocum0_.XWD_FULLNAME'
Anyone knows what is the component that is responsible for this query? for
each new tag, this kind of query is executed to create sort index?
Thanks
2014-08-23 3:46 GMT-03:00 O.J. Sousa Rodrigues <osoriojaques(a)gmail.com>om>:
mit freundlichen Grüßen
Clemens Klein-Robbenhaar
--
Clemens Klein-Robbenhaar
Software Development
EsPresto AG
Breite Str. 30-31
10178 Berlin/Germany
Tel: +49.(0)30.90 226.763
Fax: +49.(0)30.90 226.760
robbenhaar(a)espresto.com
HRB 77554 B - Berlin-Charlottenburg
Vorstand: Maya Biersack, Peter Biersack
Vorsitzender des Aufsichtsrats: Dipl.-Wirtsch.-Ing. Winfried Weber
Zertifiziert nach ISO 9001:2008
Wouldn't this be a perfect case for a
NoSQL-DB like Neo4J?
Am 22.08.2014 23:13 schrieb "Paul Libbrecht" <paul(a)hoplahup.net>et>:
first
to
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Danilo,
have you checked the MySQL process list?
I'd suspect something is hogging.
For search, I'd recommend to leverage solr… but with an amount of
customizations. There are some hooks in the solr-plugin, I believe.
hope it helps.
paul
On 22 août 2014, at 22:54, Danilo Oliveira <daniloa.oliveira(a)gmail.com>
wrote:
the
Hello Devs,
I am developing an application based on XWiki that is mapping,
connecting,
> relating and graphical disposing movie information in order to make
> possible to the user explore their trailers.
>
> At the beginning with a light data set (<5k movies) the application was
> running well, but today I started to populate my database (MYSQL) and > application became unusable, the queries is
taking more than 5 minutes
to
> complete. Actually, it has more than 15k
movies (1 movie = 1 doc) and I
> need to upload more 100k.
>
> I already have checked the cache and performance page but I don't know
if
they[1][2] solve my problem:
I think that is a architecture challenge.
My AS IS process is:
-User insert a movie,
-the application search for the movie and their related films based on
its
characteristics (a lot of joins and other
algorithms) (bottleneck)
-the application returns the results as a map;
I am wondering if I could use the custom mapping[3] to solve my problem
due
> the fact that the relationship information for each movie, in this moment,
don't need to change often. Each movie has X movies related,
sorted
by similarity. So, I could create some
relationship algorithm that will
run
> scheduled ( 1 time by week) and populate this new table .I am thinking > use dataframe panda of python to talk
directlly with mysql and make
data
analysis,
any other suggestion?
So I would create a custom map to my relationship movie class, run the
algorithm, populate the new table, so my TO BE would be:
TO BE
-user insert movie info;
-simple select on the customtable "MoviesRelated";
-the application returns the results;
I would appreciate some opinion. Thank you very much.
[1]http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Performances
[2]http://extensions.xwiki.org/xwiki/bin/view/Extension/Cache+Module
[3]http://platform.xwiki.org/xwiki/bin/view/DevGuide/CustomMapping
Danilo
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Danilo Amaral de Oliveira
Engenheiro de Computação
celular (32) 9111 - 6867
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