How should the crashkernel parameter be configured for using kdump on Red Hat Enterprise Linux?

Environment

• Red Hat Enterprise Linux 5 or later
• kdump

Issue

• What is the recommended RAM size to reserve for kdump kernel for different different sizes of RAM?

Resolution

• For different version of Red Hat Enterprise Linux, please find the following documents according to the system's major version:
  • Red Hat Enterprise Linux 5: How should the crashkernel parameter be configured for using kdump on Red Hat Enterprise Linux 5(RHEL5)?
  • Red Hat Enterprise Linux 6: How should the crashkernel parameter be configured for using kdump on Red Hat Enterprise Linux 6(RHEL6)?
  • Red Hat Enterprise Linux 7: How should the crashkernel parameter be configured for using kdump on Red Hat Enterprise Linux 7(RHEL7)?
  • Red Hat Enterprise Linux 8:How should the crashkernel parameter be configured for using kdump on Red Hat Enterprise Linux 8(RHEL8)?
  • Red Hat Enterprise Linux 9:How should the crashkernel parameter be configured for using kdump on Red Hat Enterprise Linux 9 ?
  • Red Hat Enterprise Linux 10:How should the crashkernel parameter be configured for using kdump on Red Hat Enterprise Linux 10 ?

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