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Published 20 hours ago • verified publisher icon sap-linuxlab

sap_hana_preconfigure: Support setting kernel command line parameter clocksource=tsc (lsr/sap-hana-preconfigure issue #195)

Open berndfinger opened this issue 3 years ago • 2 comments

Copy of https://github.com/linux-system-roles/sap-hana-preconfigure/issues/195#issue-982529286, reported by berndfinger:

See https://docs.aws.amazon.com/sap/latest/sap-hana/operating-system-and-storage-configuration.html#configure-operating-system-rhel-for-sap-7.x for example.

berndfinger avatar Jan 28 '22 18:01 berndfinger

Copy of https://github.com/linux-system-roles/sap-hana-preconfigure/issues/195#issuecomment-908175852 (comment by berndfinger):

See also SAP note 2753418.

berndfinger avatar Jan 28 '22 18:01 berndfinger

According to SAP note 2753418 version 22, SAP 2.0 HANA SPS 06 is using the system timer implementation due to the improved performance with newer Linux kernel versions. So maybe setting the clocksource to tsc is no longer be necessary (however, previous HANA 2.0 versions still might display "Timer fallback" or "Fallback to system call for HR timer" messages in SAP HANA trace files).

berndfinger avatar Jan 30 '22 15:01 berndfinger

The discussion had stopped a long time ago, so it should be fine to move this issue to backlog.

berndfinger avatar Feb 17 '25 10:02 berndfinger

... or even label it as wontfix.

berndfinger avatar Feb 17 '25 10:02 berndfinger