Friday, January 20, 2012

VMware - Hot adding memory in Linux VM

POC CentOS 5.5

1. Add memory in VM

2. Run this command to check the state of the memory, looking for memory that appears offline.

#grep offline /sys/devices/system/memory/*/state

3. If memory appears as offline, set it to online with the command:

#echo online > /sys/devices/system/memory/memory[number]/state

Note: I'm using for loop to run above command in one shot on all memory slots.

[root@linuxbug]# for qw in `grep offline /sys/devices/system/memory/*/state | awk -F':' '{print $1}'`; do echo online > $qw; done

4. Verify memory

#free -m


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