supermetric total memory on run vms

[vsphere5admin]

hi guys!

anyone can help me to build a supermetric for sum only running vm's memory on esxi?

thx a lot!!

[vsphere5admin]

i built this:

sumN(Virtual Machine: Memory|Guest Configured Memory (KB),1) and apply to hosts.

but this sm can provide the total vm's memory configured...also power-off vms.

Any idea for only powered on?