OL/RHEL: Setting the Power Management Hardcap Power Limit Prior With the Host Power Off Does Not Control System Power (7009666)

If you set a system power limit in ILOM with host main power off, and the operating system (OS) is Oracle Linux 5.5 or RHEL 5.5, the power limit is not adhered to by the system once it is powered back on.

For example:

1. With the node host powered off, but logged into the node ILOM SP, enter the command:

   -> cd /SP/powermgmt/budget

2. Set the power limit:

   -> set pendingpowerlimit=140 commitpending=true

   Set 'pendingpowerlimit' to '140'
   Set 'commitpending' to 'true'

Even though you set a power budget cap of 140 watts, the host system will ignore this limit once it is powered on.

Workaround

Set your system power limit caps in ILOM only when the host system is fully powered on.