How To Install & Configure KDUMP on Oracle Linux 6

1). Install the kexec-tools package:

# yum install kexec-tools

2). Configure the amount of memory reserved for the kdump kernel in /boot/grub/grub.conf by adding the crashkernel=<size>M parameter to the list of kernel options, and then rebooting the linux system to make it take effect.

For example:

# vi /boot/grub/grub.conf

...

title Oracle Linux Server-uek (2.6.39-200.24.1.el6uek.x86_64)

   root (hd0,0)

   kernel /vmlinuz-2.6.39-200.24.1.el6uek.x86_64 ro root=/dev/mapper/vg_ol6desktop-lv_root crashkernel=128M

   initrd /initramfs-2.6.39-200.24.1.el6uek.x86_64.img

...

# reboot

3). Modify items in configuration file /etc/kdump.conf:

Several parameters are set in the