Oracle database /etc/sysctl.conf (RHEL5.5 64bit)

net.ipv4.ip_local_port_range = 9000 65500
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
fs.file-max = 101365
net.core.rmem_default = 1048576
net.core.rmem_max = 1048576
net.core.wmem_default = 262144
net.core.wmem_max = 262144
fs.aio-max-nr = 3145728
# Allocate 256*2MiB for HugePageTables (YMMV)
vm.nr_hugepages = 256

# Members of group dba(501) can allocate "huge" Shared memory segment
vm.hugetlb_shm_group=501

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