First, after you check those boxes, do they stay checked? Meaning - you hit "list resources", you check "CPU and Memory", you click submit.
Then you click "List Resources" again - is CPU and Memory checked or not?
Second, you need to give things 1 or 2 polling cycles to populate (which is usually 5 or 10 minutes.
Third, some of the graphs are set to show 30-minute intervals by default. That means you won't see a data point until 30 minutes have passed. You can click "edit" for each graph to change the sample interval if you like.
Finally - some systems are not set to present all SNMP data to the poller. Solaris, AIX, Tru64, HP-UX, and other "closed" versions of Unix among them. You may have to modify your SNMPD settings to allow all branches of the SNMP mib to be polled.
Let me know if you need more information.
I know this thread is a couple months old, but I am experiencing a similar issue with ESXi hosts.
If I check the "CPU and Memory" box under "list resources" and submit, it is not checked when I go back into "list resources". I am able to successfully test the SNMP string I have configured on the ESXi boxes in "Edit Node", so I know SNMP is configured.
Any help with this would be greatly appreciated!
I am also seeing this issue. At some point all my ESXi servers stopped reporting their CPU and Memory.
I am using NPM 11.5.2