Hello, I will redo some tests with my profiler tool to give you more precision ...
Best regards, Olivier -----Original Message----- From: users-boun...@xwiki.org [mailto:users-boun...@xwiki.org] On Behalf Of Sergiu Dumitriu Sent: Thursday, May 17, 2012 4:36 AM To: XWiki Users Subject: Re: [xwiki-users] [xwiki 3.2] virtual user big performance issues On 05/15/2012 12:55 PM, Merlin Olivier wrote: > Hello Vincent, > > I have recreated the indexes on one multiwiki ... and I get the same > performance results Each page are loaded in 4-5 seconds. > In fact there was an improvement in the DB usage but it was not a lot before. > The API breakdown shows me: > - 1200 ms in the classloading Does it spend so much time in classloading for each request, or just for the first one? > - 930 ms in the XML processing > - 580 ms for the xwiki API > - 420 ms for JDBC > - 350 ms for wiki model > (...) > > The problem of performance is really on the application server code response > time - not in the database. > - the problem could be in the big amount of exception raised (is it > normal ?) > - Glassfish 3.1 issues ? We use a 64bits deployment with a sun > jdk1.6.0_26 Xms = Xmx = 2Gb > - 3.2 version > - the HW not sufficient ? We use a VMware with a Redhat Linux 5.7 > - 2 core CPU ( X5650 @ 2.67GHz ) > - 4Go RAM > > Any ideas ? Good config to test ? > My next ideas would be : > - migrate to Weblogic > - migrate to xwiki 4.x > > I can send you all the list of exception - it consumes a lot of CPU for me ... > > > Thanks for your help > Olivier > > > > > -----Original Message----- > From: users-boun...@xwiki.org [mailto:users-boun...@xwiki.org] On > Behalf Of Vincent Massol > Sent: Tuesday, May 15, 2012 5:56 PM > To: XWiki Users > Subject: Re: [xwiki-users] [xwiki 3.2] virtual user big performance > issues > > Hi Merlin, > > On May 15, 2012, at 5:41 PM, Merlin Olivier wrote: > >> Hello, >> >> On the xwiki 3.2, we have decided to use the virtual xwiki >> (multi-tenant) feature as it should be better for scalability and >> performance >> http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Virtualization >> >> >> "Each wiki has its own database schema, thus allowing for a complete data >> separation between the different wikis in the same instance. >> >> The main advantage of multi-tenancy is performance optimization." >> Problem: >> The main wiki has a relative good level of performance - with a >> response time around 2.5 second to browse a page So we are in the >> xwiki database But when we are in a virtual wiki (another schema ) - the >> performance are very poor. >> The average response time is around 5 seconds per page !!! So at list 2 >> times slower. >> >> We are using MySQL and glassfish 3.1 - and we have done tuning on the MySQL >> database and glassfish. >> >> We have used a profiling tool and see that the request send to the virtual >> environment are raising a big amount of exception ... >> The problem is not on the database part (even if they are many SQL >> calls to visualize only one page) The problem seems really to be on the >> virtual environment configuration OR in a file corruption ... >> >> I have attached the exception list . (exception_list.xls) From this >> is it possible to know if we have an installation issue ?? >> >> Does someone have experience of very good performance with xwiki ? ( >> response time #1second per page) In that case > > I can tell you fore sure that there's no performance issue with multiwikis. > Each wiki has its own DBs so it's really fast. > > Maybe you don't have indexes set on the subwikis? I think we started setting > them automatically in XE 3.2 but it's worth checking, see: > http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Database+Administr > ation > > Thanks > -Vincent -- Sergiu Dumitriu http://purl.org/net/sergiu/ _______________________________________________ users mailing list users@xwiki.org http://lists.xwiki.org/mailman/listinfo/users _______________________________________________ users mailing list users@xwiki.org http://lists.xwiki.org/mailman/listinfo/users
