We have Palo Alto devices that are always having higher percentage utilization compare to CA-PM.
We sent a case to CA Support but was replied that everything from CA is correct.
I dig a bit and found out the reason might be from Linux based system, which Palo Alto units are Linux base.
For example, on PA, total memory is 10000, used 8000, with cached 2000 and 2000 buffered. So on Palo Alto side, it showed Memory is 8000/10000 = 80%;
However, for SNMP, it take that cache/buffer account so the dashboard only shows (8000 - 2000 - 2000) / 10000 = 40%.
So we have two different results on Memory Usage: 80% and 40%;
I know one option is we don't have to do anything, just keep as it is. Because we don't have to consider cache/swap/buffer as real memory. Any comment?
Many thanks!
Tao Yang