17.10 - Selecting the System Kernel Values - Teradata Tools and Utilities

Teradata® Tools and Utilities for IBM AIX Installation Guide

Product
Teradata Tools and Utilities
Release Number
17.10
Release Date
June 2021
Content Type
Installation
Publication ID
B035-3125-061K
Language
English (United States)
During installation, the Teradata Parallel Transporter Base package checks for the system kernel values.
Parameter Maximum Value Description
SEMMNI 1000 Maximum number of semaphore sets in entire system.
SEMMNS 1000 Maximum number of semaphores in entire system.
SEMMNU 2500 Maximum number of processes that can have undo operations pending on semaphores
SHMMAX 4194304 Maximum size of a shared memory segment.
SHMMNI 200 Maximum number of shared memory segments in entire system.
SHMSEG 10 Maximum number of shared memory segments per process.
Checked only on Oracle Solaris 8.
The Teradata Parallel Transporter Base installation does not support formula value. If the kernel value is a formula, then the Teradata Parallel Transporter Base installation displays a warning message.
  1. Start to install a Teradata Parallel Transporter product.
    If the system does not meet the required minimum value, the Teradata Parallel Transporter installation prompts to increase the value to the minimum required value.
    Warning: The current value of 1048675 for the kernel parameter
    (SHMMAX) is less than the minimum required value of 4194304. SHMMAX
    refers to the maximum size of a shared memory segment. 
    
    Note: This install recommends increasing the value to the minimum required value. 
    
    Note: A kernel rebuild is not required to make the kernel parameter change(s) effective.
    
    Note: A reboot is required to make the kernel parameter change(s)effective. 
    
    The reboot can be done after this installation but before running Teradata Parallel Transporter jobs. 
    
    Do you want to increase the value to the minimum required value for the above kernel parameter(s)? 
    
    Please enter y for yes or n for no [y,n,? (default : y)]
  2. Type n to keep the current kernel value or press Enter to change the kernel value (this is the default). A reboot is required to make the kernel parameter changes effective.
  3. Log on as root user to reboot the system.
    The reboot can be done after all the installations, but must be done before executing a Teradata Parallel Transporter job.
  4. Use the following command to reboot the system in 60 seconds:
    cd /usr/sbin/shutdown -y -g60 -i6