How do I verify the kernel parameters to check for the pre-requisities of Oracle 11 versions

Question

I want to know how to check the values of shmmax, shmni, shmall, shmmin, shmseg are set correctly or not. Because when I am installing oracle database it is asking me to verify these kernel parameters.

Answer 1

Please check the below-mentioned syntax and commands:

To see all kernel parameters, execute these below commands in your root directory by changing to -

su - root

& then execute:
sysctl -a

Next, 

To verify shmmax, execute:

cat /proc/sys/kernel/shmmax
shmmax  = 2147483648

To verify shmmni, execute:

cat /proc/sys/kernel/shmmni
shmmni  = 4096

To verify the shmall parameter, execute the command below. shmall is used in 10g R1.

cat /proc/sys/kernel/shmall
shmall  = 2097152

To verify shmmin, execute:

ipcs -lm |grep "min seg size"
shmmin  = 1

Note that shmseg is hardcoded in the kernel, the default is much higher.

shmseg  = 10