$ cat /etc/sysctl.conf
# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled.  See sysctl(8) and
# sysctl.conf(5) for more details.

# Controls IP packet forwarding
net.ipv4.ip_forward = 0


net.ipv4.conf.default.rp_filter = 1

# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0


kernel.sysrq = 0

kernel.core_uses_pid = 1

# Controls the use of TCP syncookies
net.ipv4.tcp_syncookies = 1

# Controls the maximum size of a message, in bytes
kernel.msgmnb = 65536

# Controls the default maxmimum size of a mesage queue
kernel.msgmax = 65536

# Controls the maximum shared segment size, in bytes
kernel.shmmax = 68719476736

# Controls the maximum number of shared memory segments, in pages
kernel.shmall = 4294967296

kernel.core_pattern = core.%e.%t

# Oracle Settings
net.ipv4.ip_local_port_range=9000 65500
net.ipv4.tcp_rmem = 4096 262144 26214400
net.ipv4.tcp_wmem = 4096 262144 26214400
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.all.secure_redirects = 0
net.ipv4.conf.default.secure_redirects = 0
net.ipv4.tcp_timestamps = 0
vm.pagecache=30
vm.swappiness=100
kernel.shmmni=4096
kernel.sem=268 32000 100 142
fs.file-max=6815744
fs.aio-max-nr=1048576
vm.nr_hugepages=32768
#vm.nr_hugepages=0
vm.drop_caches=0
net.core.rmem_default=262144
net.core.wmem_default=262144
net.core.rmem_max=4194304
net.core.wmem_max=1048576