16.10 - Setting Parameters for Shared Memory - Teradata Tools and Utilities

Teradata Tools and Utilities for Linux Installation Guide CentOS, Red Hat, SUSE, s390x, Ubuntu

prodname
Teradata Tools and Utilities
vrm_release
16.10
created_date
May 2017
category
Installation
featnum
B035-3160-057K
The Teradata Parallel Transporter Base installation checks the values of the shared memory parameters for the required minimum values. If the value for a shared memory parameter is less than the minimum value, the installation recommends increasing the value to the minimum value.

The shmmni parameter determines the system-wide limit on the number of shared memory segments that can be created.

The shmmax parameter determines the maximum size of a shared memory segment. The minimum value is 4194304.

  1. Log on as the root user.
  2. Check the value of the shmmni parameter; the minimum value is 200:

    /sbin/sysctl kernel.shmmni

  3. Add the following line in the /etc/rc.d/rc.local file to increase the shmmni parameter value to 200:

    echo 200 > /proc/sys/kernel/shmmni

  4. To shut down the system in one minute, type:

    /sbin/shutdown -r +1