vCenter Performance Overview Tab fails to display

There are several possible causes for this issue.check the following step by step:

1. Confirm that the vCenter Web Management Service is running.
2. To resolve this issue, connect to vCenter locally with a vSphere Client located on the vCenter Server and follow Stopping, starting, or restarting vCenter services.
3. Ensure that the correct DNS settings and IP address are being used
4. Disable any third party web services that may be interfering with the vCenter Web Management Services.(port 8443)
5. Check if vCenter Server is using custom SSL certificates as a result of a recent upgrade to vCenter Server 4.0 Update 1. 
6. Disable the proxy settings from the browser. 

Ref: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1014454