Set the current generation for storage allocation. By default the system allocates memory from the youngest generation (generation 0).
(set-default-generation 1)
;; allocate from an
;; older generation
(set-default-generation 0)
;; return to normal
allocation-in-gen-num
clean-generation-0
collect-generation-2
collect-highest-generation
expand-generation-1
get-default-generation
set-promotion-count
*symbol-alloc-gen-num*