Oracle linux

Updating

For some reason Oracle Linux 5.5 doesn't come with any repos, so updating requires setting this up

• Download Repo

# cd /etc/yum.repos.d
# wget http://public-yum.oracle.com/public-yum-el5.repo

• Enable [el5_u5_base] and [ol5_u5_base] in this repo
• yum install kernel
• yum install oracle-linux

More info [here]

Kernel Params for Oracle

[root@dsoragrid01 ~]# cat /etc/sysctl.conf 
# Kernel sysctl configuration file for Oracle Enterprise 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

# Controls source route verification
net.ipv4.conf.default.rp_filter = 1

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

# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 0

# Controls whether core dumps will append the PID to the core filename
# Useful for debugging multi-threaded applications
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.sem = 250 32000 100 128

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.file-max = 6553600