Use the following command to check the current settings for the system parameters.
/sbin/sysctl -a
Example
# /sbin/sysctl -a … (omitted) … kernel.sem = 256 32000 32 128 kernel.shmmax = 68719476736 kernel.shmall = 4294967296 kernel.shmmni = 4096 … kernel.msgmax = 65536 kernel.msgmnb = 65536 kernel.msgmni = 16 … (omitted) …
Refer to "E.1 Tuning Values for System Parameters" above, and compare the current settings to the values above. Calculate an appropriate value for each parameter, taking into account the parameter type ("Maximum" or "Addition").
Edit the /etc/sysctl.conf file as shown in the following example.
Example
kernel.sem = 512 55481 50 2891 kernel.shmmni = 4252 kernel.msgmnb = 114432 kernel.msgmni = 1582
Use the following command to check that the changes have been applied to the /etc/sysctl.conf file.
# /bin/cat /etc/sysctl.conf
To enable the settings entered in Step 3, perform either of the following methods.
Apply the settings by rebooting the system.
# /sbin/shutdown -r now
Apply the settings by executing the "/sbin/sysctl -p" command.
# /sbin/sysctl -p /etc/sysctl.conf (*)
*: There is no need to reboot the system if this command is used.
The output of the following command can be used to check whether the specified system parameters have been updated.
# /sbin/sysctl -a
Example
# /sbin/sysctl -a … (omitted) … kernel.sem = 512 55481 50 2891 kernel.shmmax = 68719476736 kernel.shmall = 4294967296 kernel.shmmni = 4252 … kernel.msgmax = 65536 kernel.msgmnb = 114432 kernel.msgmni = 1582 … (omitted) …
