Hi, There is also this issue related to 'Very slow creation time for workspaces or subwikis on MySQL' http://jira.xwiki.org/browse/XWIKI-8245 Not sure it's important but I'd be curious what options you have selected during the creation process (a.k.a you are creating 'old workspaces' (with global users) or wikis with local users). Anyway maybe this kind of tests should be done after we finish the wikis improvements. Thanks, Caty On Fri, Dec 13, 2013 at 11:54 AM, Guillaume Fenollar < guillaume.fenollar(a)xwiki.com&gt; wrote:

On 13 Dec 2013 at 10:54:38, Guillaume Fenollar (guillaume.fenollar(a)xwiki.com) wrote: Hi,  Good initiative. Have you checked the logs? Are you sure the database  (HSQLDB here) is not the problem?  Perhaps you'll want to run the same tests with a more robust database, like  postgreSQL or even MySQL ?  I’ve reproduced the issue. It’s a problem of the context user which gets reset to null. I think it’s a multithreading bug somewhere in our code. Thanks -Vincent Have fun!  Guillaume Fenollar  2013/12/12 Jean SIMARD &lt;jean.simard(a)xwiki.com&gt; 

If you wanna test only XWiki, you should consider using MariaDB or even Percona instead of MySQL (so you can lower your chance being limited by database). MariaDB and Percona both uses XtraDB (improved InnoDB by Percona), but Percona should be more "stable" in such stress tests. 2013/12/13 Jean SIMARD &lt;jean.simard(a)xwiki.com&gt; -- S pozdravem Lukáš Raška

Hi, Also, keep in mind that, with the code you`re using, you`re creating empty wikis. In practice, when using (copying) a template or a flavour/extension (future feature done with the Extension Manager), your wiki creation times will grow considerably. Basically all you are testing now is the creation of databases and a document (the wiki descriptor). Each empty wiki practically consists of these 2 elements: 1) the database 2) the descriptor. Of course, when creating the database, some basic wiki classes are also created automatically, so you can add them to the count :) Anyway, nice experiment! Thanks for sharing! Would be nice to see more of these on XWiki's features. Cheers, Eduard On Fri, Dec 13, 2013 at 4:19 PM, Jean SIMARD &lt;jean.simard(a)xwiki.com&gt; wrote:

FTR I’m still investigating the problem. The issue is that at some point (which can happen after 5 wiki creation, after 50, after 150, or at any time) the storage is not able to load the xwiki:XWiki.Admin page from the DB. It returns a new document which is then cached empty. Then when the rights checks are performed for the current user (which is Admin) the code gets the Admin document from the cache and since it doesn’t contain any XWikiUsers object, the permission is refused. I’m now trying to investigate in the HSQLDB code why this happens but it’s extremely difficult since it doesn’t always happen. My main suspect is the wrong schema being used but I need to understand if this is the case and more importantly why the schema would be set wrongly suddenly (possibly some multithreading aspect). Thanks -Vincent On 16 Dec 2013 at 08:51:24, Jean SIMARD (jean.simard(a)xwiki.com) wrote: That's right. I was also thinking about the time for templates loading. However, it seems that the evolution of time in my experiments is exponential so it will not make it worse I suppose ^_^ I'll just reduce the maximum number possibly by a hundred which will not really make a difference for me. However, thanks for noticing and thanks for the info about descriptors and database. -- Jean On ven., 2013-12-13 at 16:57 +0200, Eduard Moraru wrote: _______________________________________________ devs mailing list devs(a)xwiki.org http://lists.xwiki.org/mailman/listinfo/devs