SNMP and the memory usage

Hello,

I would retrieve the memory usage with SNMP and Nagios to monitor the ESX servers. The problem is that I retrieve only the memory usage of service console. I would retrieve the memory total usage (example : 8,5 GB used on 16 GB).

By browsing the MIBs files (VMWARE-VMKERNEL-MIB and VMWARE-VMINFO-MIB), I did not find this information. There is only total memory allocated to each VMs.

Thanks,

Regards.