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.
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
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2005.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> _______________________________________________
> Semediawiki-devel mailing list
> Semediawiki-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/semediawiki-devel
>
>
--
Sergey Chernyshev
http://www.sergeychernyshev.com/
-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
Semediawiki-devel mailing list
Semediawiki-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/semediawiki-devel
