+@defvar debbugs-cache-expiry
+The function @code{debbugs-get-status} (@pxref{Requesting bugs
+statuses}) caches retrieved status entries in order to improve the
+performance. This variable determines the number of seconds an entry
+is cached, before it is retrieved again. A value of @code{nil}
+disables cache expiration, and a value of @code{t} disables caching.
+Both values are not recommended for a usual workflow.
+@end defvar
+