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 ([email protected]) 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: > 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 <[email protected]> wrote: > > > Hi, > > > > I'll probably need to make it work on a MySQL for the final project but > > I keep MariaDB and Percona (I didn't know this one) in mind for other > > projects, thanks :-) > > > > -- > > Jean > > > > > > On ven., 2013-12-13 at 12:50 +0100, Lukáš Raška wrote: > > > 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 <[email protected]> > > > > > > > Hi, > > > > > > > > I didn't look well but I can say one thing. In the first method, when > > > > the around-250 subwikis are reached, the log is displaying errors for > > > > the next few minutes without stopping. As discussed with Thomas, we > > may > > > > think this is OutOfMemory error due to HSQLDB but it's probably not > > > > because of the second method that show that I can create more than 600 > > > > subwikis (the second method is more likely to be an OutOfMemory error > > > > looking the time evolution, I really should have look more carefully > > the > > > > logs!). > > > > I may try later on a MySQL server. > > > > > > > > Thanks, > > > > -- > > > > Jean > > > > > > > > > > > > On ven., 2013-12-13 at 10:54 +0100, Guillaume Fenollar 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 ? > > > > > > > > > > Have fun! > > > > > > > > > > Guillaume Fenollar > > > > > > > > > > > > > > > 2013/12/12 Jean SIMARD <[email protected]> > > > > > > > > > > > Hi, > > > > > > > > > > > > I need to create a lot of subwikis in a XWiki instance > > > > (5.3-milestone-2) > > > > > > for a project and was interested in the possibilities and limits of > > > > > > XWiki. I tried to make a basic stress test to evaluate a maximum > > > > number > > > > > > of subwikis that XWiki can handle. > > > > > > I wrote a small report and provide files used on this link: > > > > > > > > http://hole.tuziwo.info/stress-test-xwiki-for-subwikis-creation.html > > > > > > > > > > > > I'll be happy to have feedback on that. For example, I would like > > to > > > > > > know if my first method do something bad or if this is a possible > > bug > > > > in > > > > > > XWiki. If this is a bug, I hope this can be improved since I think > > that > > > > > > I will need more than 1000 subwikis in my project. > > > > > > > > > > > > Hope this helps. > > > > > > Sincerely, > > > > > > -- > > > > > > Jean > > > > > > > > > > > > _______________________________________________ > > > > > > devs mailing list > > > > > > [email protected] > > > > > > http://lists.xwiki.org/mailman/listinfo/devs > > > > > > > > > > > _______________________________________________ > > > > > devs mailing list > > > > > [email protected] > > > > > http://lists.xwiki.org/mailman/listinfo/devs > > > > > > > > _______________________________________________ > > > > devs mailing list > > > > [email protected] > > > > http://lists.xwiki.org/mailman/listinfo/devs > > > > > > > > > > > > > > > > > _______________________________________________ > > devs mailing list > > [email protected] > > http://lists.xwiki.org/mailman/listinfo/devs > > > _______________________________________________ > devs mailing list > [email protected] > http://lists.xwiki.org/mailman/listinfo/devs _______________________________________________ devs mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/devs _______________________________________________ devs mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/devs
