The value of the variable
*sg-default-size*
is the initial size of a stack group, in 32 bit words (in 32-bit implementations) or in 64 bit words (in 64-bit implementations).
*sg-default-size*
can be bound around a call to a process creation function. Note that setting the global value of this variable affects the size of all system processes too, so this is not recommended.
To create a process with a stack of 32000 words:
(let ((sys:*sg-default-size* 32000))
(mp:process-run-function "Larger stack" '()
#'(lambda ()
(print (hcl:current-stack-length)))))