hi, seems using HT:SESSION-VALUE without ever calling HT:START-SESSION never calls HT::COUNT-SESSION-USAGE CL-USER> (sb-introspect:who-calls 'ht::count-session-usage) ((HUNCHENTOOT:START-SESSION . #S(SB-INTROSPECT:DEFINITION-SOURCE :PATHNAME #P"/home/lars/programming/lisp/hunchentoot/session.lisp" :FORM-PATH (12 4) :CHARACTER-OFFSET 7759 :FILE-WRITE-DATE 3415636264 :PLIST NIL :DESCRIPTION NIL))) CL-USER> (sb-introspect:who-calls 'ht:start-session) NIL so the only thing that calls HT::COUNT-SESSION-USAGE is HT:SESSION-START, and nothing calls HT:SESSION-START .. (hope i got this right; i'm tired) from the documentation (which is great btw.) I assumed "(counting only requests which use sessions)" included cases where I used SESSION-VALUE since, well, i "use" sessions then ... :) http://www.weitz.de/hunchentoot/#*session-gc-frequency* -- Lars Rune Nøstdal http://nostdal.org/