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RHEL 4 CPU limitation [closed]

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http://stackoverflow.com – We have RHEL 4 ES running on VMware ESX5 and we have assigned 4 Socket, 1 core per socket CPUs. But i heard RHEL 4 ES has limitation of Maximum 2 Psychical CPU. But when i run top or mpstats its showing its utilizing all 4 CPUs. How? Kernel version 2.6.9-55.ELsmp #1 SMP 03:33:47 PM CPU %user %nice %system %iowait %irq %soft %idle intr/s 03:33:48 PM all 40.50 0.00 4.25 0.00 0.25 1.25 53.75 2843.00 03:33:48 PM 0 53.00 0.00 5.00 0.00 2.00 4.00 36.00 1810.00 03:33:48 PM 1 28.00 0.00 4.00 0.00 0.00 0.00 68.00 (HowTos)