kdump support for 2TB physical memory in Oracle Linux 6.x with UEK2/UEK3
Last updated on SEPTEMBER 14, 2017
Applies to:Linux OS - Version Oracle Linux 6.3 with Unbreakable Enterprise Kernel [2.6.39] and later
With 2TB physical memory of Oracle Linux 6 with UEK2/UEK3 kernel, kdump goes into oom_kills when makedumpfile dumps multiple vmcore files in parallel (due to the fact UEK2 and UEK3 can only reserve 448M for the crashkernel), plus several hours outage for Production Server to generate vmcore files is unacceptable.
This document instructs how to configure kdump on 2TB physical memory of Oracle Linux 6 with UEK2/UEK3 kernel.
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