CPU frequency settings ignored

Detail name	Value
Changelog Number	9754
Type	Bug
Status	Resolved
Affected Versions	Exasol 6.1.0, Exasol 6.2.0, Exasol 7.0.alpha1
Fix Versions	Exasol 7.0.0, Exasol 6.1.9, Exasol 7.0.alpha1, Exasol 6.2.6
Resolution Date	2020-03-26

Problem

A default service installed on Centos7 can change CPU frequency scaling settings on its own during boot. 
As a result, CPU frequency scaling settings that are normally configured via EXAOperation at an earlier stage can be overwritten. 

Workaround

If you have root access to affected nodes, the tuned service can be manually disabled via:

systemctl disable tuned

Furthermore the CPU frequency scaling settings can be set manually after boot, for example via:

cpupower frequency-set -g performance