vmassol wrote Thanks, the doc is more clear now. We will test the index modifications on our testsystem to see if there's a noticable performance increase. One more question: Is there a system configuration (stack) that is recommended for use by the xwiki dev team? For example, which operating system / application server / database / ... ist used bei xwiki.org ? I only found the parameters as stated in http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Performances#HMemory We are currently using Windows Server + Tomcat + Postgresql. Would you recommond switching the server to a linux os? Our system admins work mostly on windows though. We'd also prefer to use MS SQL Server, but http://platform.xwiki.org/xwiki/bin/view/AdminGuide/InstallationMSSQL looks outdated and troublesome. Thanks. Mario -- View this message in context: http://xwiki.475771.n2.nabble.com/Database-indexes-for-XWiki-8-2-1-on-Postg… Sent from the XWiki- Users mailing list archive at Nabble.com.