Exalogic Physical: Typo in Kernel Parameter Results in Lower Performance
(Doc ID 2898134.1)
Last updated on SEPTEMBER 23, 2022
Applies to:Oracle Exalogic Elastic Cloud Software - Version 126.96.36.199.200714 and later
Lower performance is observed in the following Physical Linux environments:
- EECS 188.8.131.52.x environments that are upgraded to Jul 2020 PSU (184.108.40.206.200714) and higher
- EECS 220.127.116.11.x environments that are upgraded to Oct 2021 PSU (18.104.22.168.211019) and higher
Oct 2021 PSU upgrades Oracle Linux 6 Physical compute nodes from 22.214.171.124.x (126.96.36.199 codeline running UEK2) to 188.8.131.52.21109 (184.108.40.206 codeline running UEK4).
A typo in one of the kernel parameters in the grub configuration file results in lower performance following this kernel upgrade.
A similar typo in the kernel parameter in the grub configuration file on Oracle Linux 7 Physical compute nodes running Jul 2020 PSU or higher also results in lower performance compared to earlier PSU releases.
The degree of impact to performance depends on the workload.
- Jul 2020 PSU (220.127.116.11.200714) or higher was applied to the Exalogic rack running EECS 18.104.22.168.x
- Oct 2021 PSU (22.214.171.124.211019) or higher was applied to the Exalogic rack running EECS 126.96.36.199.x
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In this Document
|Oracle Linux 6|
|Oracle Linux 7|