Scieneer Common Lisp 1.3.9 online documentation

ext:*gc-notify-after*[Variable]

The function bound to this variable is invoked after GC'ing, unless *gc-verbose* is nil, with the amount of dynamic usage, in bytes, now free, the number of bytes freed by the GC, and the new GC trigger threshold. The function should notify the user that the system has finished GC'ing.