On Sonntag, 30. Dezember 2007, Sergey Chernyshev wrote: > Hmm. I didn't realize there is a way to remove $smwgQDefaultNamespaces > restriction and this will enable all namespaces instead of disabling them. > > Why is it that this setting not set to NULL by default then? I don't see > any point in restricting namespaces unless it's absolutely necessary for > security reasons or something.
I agree. Done.
Markus
>
> Sergey
>
> On Dec 29, 2007 10:29 AM, Markus Krötzsch <[EMAIL PROTECTED]> wrote:
> > On Freitag, 28. Dezember 2007, Lau, William (NIH/CIT) [E] wrote:
> > > We have a set of semantic queries in a template. That template is used
> > > in some pages. However, by looking at the database process list, it
> > > seems that those set of queries are processed whenever a page is
> > > requested, even when the template is not used by the requested page
> > > (e.g. special pages).
> >
> > Do I understand this correctly? The delivery of special pages that are
> > completely unrelated to said template triggers the ask-queries contained
> > therein? This would be very strange behaviour indeed (I cannot currently
> > imagine how or why this should happen in MediaWiki)!
> >
> > > All the SQL queries are generated by the
> > > getQueryResult function. Since those queries are very computational
> > > intensive, this "bug" slows down the entire site. If we take the inline
> > > queries out of the template or change $smwgQEnabled to false, the site
> > > becomes fast again. Has anyone experienced the same issue?
> >
> > In general, if queries on some site are too slow, it is useful to
> > configure
> > SMW to support faster querying (with less features, of course). Basic
> > settings one can try to speed up querying are:
> >
> > include_once('extensions/SemanticMediaWiki/includes/SMW_Settings.php');
> > $smwgQSubcategoryDepth = 0;
> > $smwgQSubpropertyDepth = 0;
> > $smwgQEqualitySupport = SMW_EQ_NONE;
> > $smwgQDefaultNamespaces = NULL;
> > enableSemantics("semedia-wiki.localhost");
> >
> > Those settings will speed up basically all queries, disabling all support
> > for
> > property and category hierarchies, equality (redirects), and namespace
> > restrictions (i.e. queries consider pages in all namespaces, including,
> > e.g.,
> > User:). You can experiment which of those, if any, affects your query
> > performance positively.
> >
> > If you have problems with too complex user-generated queries, then the
> > parameters $smwgQMaxSize and $smwgQMaxDepth are an option to restrict
> > this.
> >
> > In general, it should be emphasised that queries should be used in a
> > targetted
> > way. Ontoworld.org had the infamous template {{ask}} for some time, which
> > included queries for almost anything, which would just not appear if no
> > results would be obtained. Most wikis should rather have single query
> > templates for special purposes instead of trying to have one for all.
> >
> > Anyway, for further optimisation, we need some pointer to your site, or
> > at least some statistical information concerning its size
> > (Special:SemanticStatistics) and the query structure. Did you mention the
> > SMW
> > version you use? Some of the above assume SMW1.0-RC3, and none will work
> > prior to SMW1.0-RC1.
> >
> > Markus
> >
> >
> > --
> > Markus Krötzsch
> > Institut AIFB, Universät Karlsruhe (TH), 76128 Karlsruhe
> > phone +49 (0)721 608 7362 fax +49 (0)721 608 5998
> > [EMAIL PROTECTED] www http://korrekt.org
> >
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--
Markus Krötzsch
Institut AIFB, Universät Karlsruhe (TH), 76128 Karlsruhe
phone +49 (0)721 608 7362 fax +49 (0)721 608 5998
[EMAIL PROTECTED] www http://korrekt.org
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