How do I clear old Analytics data?

Thanks for the reply. I opened a support case and they told me to try those same commands. After I executed them, they did reset the Analytics graphs. I didn't reset the global performance stats, nor the LTM stats. I started seeing some Analytics stats/graphs 15 minutes later. Other graphs that have to do with http level stats (URLs, User Agents, Response Codes, etc.) and client IP address stats are still not working. The support engineer also suggested an upgrade to 11.4.1 and changing the AVR provisioning from Mimimum to Nominal. Those two will require a maintenance window so I haven't been able to try them.