HugePage Size

Dears,

I need your support urgently.

I have Oracle Linux 2.6.32-400.37.18.el6uek.x86_64

Server memory 24 GB

Oracle Memory configuration as below:

sga_max_size	big integer 7G
sga_target	big integer 7G
pga_aggregate_limit	big integer 4G
pga_aggregate_target	big integer 2G
memory_target	big integer 0
memory_max_target	big integer 0

when i try to update SGA_Target size and try to restart DB i got error (System cannot support SGA size)

below are the Page Size configuration:

grep Huge /proc/meminfo

HugePages_Total:       0

HugePages_Free:        0

HugePages_Rsvd:        0

HugePages_Surp:        0

Hugepagesize:       2048 kB

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grep memlock /etc/security/limits.conf