There is one system property as below, just set it to True
mxe.webclient.activitydashboard = true
And use this URL to access Activity Dashboard:
http://<hostname>:<port>/maximo/webclient/utility/profiler/PerfMon.jsp
Enabling PerfMon will significantly degrade server performance and so it should not be left enabled any longer then necessary to troubleshoot performance problems, especially on a production server.
Reference: https://www.ibm.com/support/pages/node/1133601