Adding memory (dynamically addable memory)
Up to 4GB of general purpose (GP or pageable) memory and up to 64GB of
dedicated (Identity Free or IDF) memory can be added dynamically
and configured without shutting down and rebooting the system.
The amount of general purpose memory that can be added dynamically
can also be autotuned based on the amount of total kernel virtual
memory and total physical memory.
Operating system licenses for extra RAM should be installed before
When new memory is added to the system (and during inital system
installation), the newly added memory is detected by the hardware.
The hardware driver (supplied by the hardware vendor) then calls a
function in the
driver, which configures the new memory according to the following
If the tunable parameter DEDICATED_MEMORY (See
``Virtual memory (VM) parameters'')
is set to a non-zero value, then
new memory is configured as dedicated memory until the
DEDICATED_MEMORY limit is reached.
If DEDICATED_MEMORY is set to ``0'',
or if the amount of memory configured as dedicated memory
has already reached the DEDICATED_MEMORY limit,
then new memory is configured as general purpose memory.
Memory must be dynamically added in multiples of 32MB.
The total amount of memory you can add dynamically to your system
is limited by:
The addressability of the processor.
If the processor does not support the Physical Address Extension
(PAE) feature, then the limit is 4GB.
Otherwise, the limit is 64GB.
The memory license limit.
You must have sufficient licenses installed for the memory you are
for an overview of licensing software.
Note that dynamic removal of memory is not supported.
Memory card compatibility notes
Adding more memory
© 2007 The SCO Group, Inc. All rights reserved.
SCO OpenServer Release 6.0.0 -- 05 June 2007