There are many OIDs and MIBs on the Internet to get same information from devices.. i guess because there are many different version of the devices.
In my case, i solved with below OIDs.
OIDs for CPU & Memory
ALL CPU | Current CPU | Free Memory |
---|---|---|
1.3.6.1.4.1.9.9.618.1.4.1.0 | 1.3.6.1.4.1.14179.1.1.5.1.0 | 1.3.6.1.4.1.14179.1.1.5.3.0 |


You should divide the “Free System Memory : 482672640” / 1024 bytes to get 471360 MB to be closed the result of SNMP

ON CISCO WEB SITE, THE OID NUMBER IS 1.3.6.1.4.1.14179.1.1.5.3.
IF YOU DO NOT INSERT 0 TO END OF THE OID, YOU WILL GET “NO SUCH INSTANCE” MESSAGE.