Setting Parameters for Shared Memory - Teradata Tools and Utilities

Teradata Tools and Utilities for CentOS Linux Installation Guide

Product
Teradata Tools and Utilities
Release Number
15.10
Published
November 2016
ft:locale
en-US
ft:lastEdition
2018-06-05
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PDF_Installation_Linux_CentOS_1600.ditamap
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installcentoslinuxfromcd
Product Category
Teradata Tools and Utilities
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