Oracle 11g: Installation on Linux

append below entries in /etc/sysctl.conf

kernel.shmall = 2097152
kernel.shmmax = 2147483648 # Smallest of -> (Half the size of the physical memory) or (4GB - 1 byte)
kernel.shmmni = 4096
# semaphores: semmsl, semmns, semopm, semmni
kernel.sem = 250 32000 100 128
fs.file-max = 65536 # 512 * PROCESSES
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default=4194304
net.core.rmem_max=4194304
net.core.wmem_default=262144
net.core.wmem_max=262144

fs.aio-max-nr = 1048576
fs.file-max = 6815744
net.core.wmem_max=1048586
net.ipv4.ip_local_port_range = 9000 65500
# sysctl -p

insert below entries into /etc/security/limits.conf

oracle soft nproc 2047
oracle hard nproc 16384
oracle soft nofile 1024
oracle hard nofile 65536