Tried out of core command as pre render in octane rop and it works.
Octane report 1.5 gb out of core memory used.
One questions about this
This is from docs
RAM USAGE LIMIT(GB):
Here you can adjust the amount of Ram in your system. Remember that the value you enter here will no longer be used by the system.
GPU HEAD ROOM (MB):
Default setting recommended.
About RAM USAGE LIMIT , is it this number always reserved/excluded during rendering , or it can scale up to requered target , and this is just limit.
In other words we can put here "infinite" number but out of core will used only required ram?