Interpreting [system] in zonestat output

Hello,
Could you, please, explain what's the difference between the 2 highlights below?

SUMMARY                 Cpus/Online: 24/24   PhysMem: 23.9G  VirtMem: 27.9G
                    ---CPU----  --PhysMem-- --VirtMem-- --PhysNet--
               ZONE  USED %PART  USED %USED  USED %USED PBYTE %PUSE
            [total]  0.02 0.12% 1545M 6.28% 4632M 16.1%   676 0.00%
           [system]  0.00 0.04% 1229M 5.00% 4329M 15.1%     -     -
             global  0.01 0.07%  315M 1.28%  303M 1.05%   676 0.00%

How [system] differs/compares from/to global?

Thanks in advance,
Carlos.