How to show more mtrics on the performance chart when select a resource pool object?

[levinpeng]

There is only one metric CPU Usage in MHz(Average) when I select Performance tab of a resource pool.

I tried to add more metrics by Customize Performance Chart dialog, but there is only one available item.

Is there more available metrics for a resoruce pool such as Memory Usage? If there is, how should I do?

[levinpeng]

I changed Statistics Level to 2. More metrics come up.

Cheers.