This page give details related to the setup sustaining myxwiki.org which is used by the XWiki Dev Team as a real life test of a very big XWiki instance.

Numbers

MyXWiki.org is a single XWiki instance currently containing 480 wikis.

Container and hardware

• maximum memory allocated to the JVM: 2048m (not huge but one of the points of MyXWiki.org is to make sure XWiki is not too bad at scaling it term of memory)
• 5 vCPU of 2.8GHz
• installed/upgraded using XWiki Debian packages
• MariaDB 10.3
• Tomcat 9

Performance related customizations

Remote Solr instance

The kind of volume myxwiki.org have to deal with does not fit well with the Solr embedded mode so we had to use a dedicated Solr standalone instance located on a different server.

• maximum memory allocated to Solr JVM: 2048m
• 2 vCPU of 2.8GHz

xwiki.cfg

• xwiki.store.cache.capacity=800
• xwiki.store.migration=0 (checking migration status takes a very long time with so many wikis and would impact restarts too much)
• xwiki.stats=0

xwiki.properties

• notifications.rest.poolSize=4

hibernate.cfg.xml

• <property name="hibernate.dbcp.maxTotal">200</property>
• <property name="hibernate.dbcp.maxIdle">20</property>

Other interresting customizations

xwiki.cfg

• xwiki.virtual.failOnWikiDoesNotExist=1
• xwiki.virtual.usepath=0
• xwiki.authentication.cookiedomains=myxwiki.org

xwiki.properties

• wiki.alias.suffix=myxwiki.org
• logging.deprecated.enabled=false