File handle requirements

On UNIX and Linux® operating systems, ensure that there are enough file handles allowed.

If you are installing Network Manager on a UNIX or Linux operating system, ensure that the number of open files for processes is set to an appropriate value in all environments for the user who runs Network Manager. Set the number of open files to at least 512 on the server where the core components are installed, and 8192 for the GUI server. You can check this value by running the following command as the user who is running Network Manager: ulimit -n

Also, ensure that you have the number of processes per user set to a minimum of 16384. You can check this value by using the following command: ulimit -u. The 16384 value is a minimum one and this value might need to be adjusted for your environment based on your needs.

If either value is too low, contact your system administrator to increase the value for your user.

Note:

If you are using log file rotation with a set pool size, bear in mind that the number of open files can increase significantly. Enabling a logging pool adds an extra number of open files equivalent to the number of Network Manager processes running multiplied by the number of log files in the pool. Ensure that the limit on open files is high enough so that processes do not encounter problems opening log files.

Linux:

Changing the values on Linux

To change the ulimit, modify the /etc/security/limits.conf file. As a system administrator (root user) you can add the following lines at the end of the /etc/security/limits.conf file:
*         soft    nproc      16384
*         hard    nproc      16384
*         soft    nofile      8192
*         hard   nofile      8192
AIX:

Changing the values on AIX®

The current values are listed in the /etc/security/limits file, in the lines that contain the parameters nofiles and nproc. As a system administrator (root user) you can use the ulimit command to change these values. For more information, search for information on the ulimit command at https://www-01.ibm.com/support/knowledgecenter/ssw_aix/welcome.