Changing kernel parameter values

This procedure describes how to change kernel parameter values from a text editor.

To change kernel parameter values:

1. Add the following lines to the /etc/sysctl.conf file

   kernel.shmall = 2097152

   kernel.shmmax = 2147483648

   kernel.shmmni = 800

   kernel.sem = 250 32000 100 128

   fs.file-max = 65536

   net.ipv4.ip_local_port_range = 32768 61000

   If the file does not already exist, create it.

   kernel.sem assigns values to four semaphore parameters in the following order: semmsl, semmns, semopm, semmni. All four values must be specified.

2. Type the following command:

   /sbin/sysctl -p

   The values in the /etc/sysctl.conf file take effect immediately.