Hello, I've been trying to get xwiki running for almost a week and keep running into memory errors. I was finally able to get through the Distribution Wizard without having to restart Jetty due to out of memory errors, but am still getting the errors when I try to do almost anything in the wiki. The standalone installer works great and is much more responsive but I would like to use Postgres for the database. Any suggestions for what I can do to get xwiki to stop the out of memory errors? Thanks, Jared Here's my current config: OS: Ubuntu 16.04.1 LTS fully patched Java:   - openjdk version "1.8.0_91"  - OpenJDK Runtime Environment (build 1.8.0_91-8u91-b14-0ubuntu4~16.04.1-b14)  - OpenJDK 64-Bit Server VM (build 25.91-b14, mixed mode) Jetty: 9.2.14.v20151106  - JAVA_OPTIONS="-server -Xms800m -Xmx2048m -XX:MaxPermSize=222m -Dfile.encoding=utf-8 -Djava.awt.headless=true -XX:+UseParallelGC -XX:MaxGCPauseMillis=100" Database: PostgreSQL 9.5.3 JDBC Driver: postgresql-9.4.1208.jar Here are the most recent errors that occurred when I tried to edit my first page: 2016-07-18 18:26:29,335 [http://nhhqwiki01:8080/xwiki/bin/view/Infrastructure/] ERROR c.x.x.XWiki                    - Error while evaluating velocity template [exception.vm] org.xwiki.velocity.XWikiVelocityException: Failed to evaluate content with id [/templates/exception.vm] at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:227) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:198) at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:726) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:627) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:605) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:571) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:557) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:65) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1896) at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:180) at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:88) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:507) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:193) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449) at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669) at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:115) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:127) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:137) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) at org.eclipse.jetty.server.Server.handle(Server.java:499) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257) at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'parseTemplate' in  class com.xpn.xwiki.api.XWiki threw exception java.lang.OutOfMemoryError: GC overhead limit exceeded at /templates/macros.vm[line 20, column 8] at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:261) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:187) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222) ... 51 common frames omitted Caused by: java.lang.OutOfMemoryError: GC overhead limit exceeded 2016-07-18 18:26:30,809 [http://nhhqwiki01:8080/xwiki/bin/view/Infrastructure/] ERROR o.i.ObservationContextListener - Can't find any begin event corresponding to [class org.xwiki.bridge.event.ActionExecutedEvent (view)] 2016-07-18 18:26:30.810:WARN:oejs.ServletHandler:http://nhhqwiki01:8080/xwiki/bin/view/Infrastructure/: Error for /xwiki/bin/view/Infrastructure/ java.lang.OutOfMemoryError: GC overhead limit exceeded