Variable: gnus-registry-extra-entries-precious
gnus-registry-extra-entries-precious is a customizable variable
defined in gnus-registry.el.gz.
Value
(mark)
Documentation
What extra keys are precious, meaning entries with them won't get pruned.
By default, mark is included, so articles with marks are
considered precious.
Before you save the Gnus registry, it's pruned. Any entries with keys in this list will not be pruned. All other entries go to the Bit Bucket.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/gnus-registry.el.gz
(defcustom gnus-registry-extra-entries-precious '(mark)
"What extra keys are precious, meaning entries with them won't get pruned.
By default, `mark' is included, so articles with marks are
considered precious.
Before you save the Gnus registry, it's pruned. Any entries with
keys in this list will not be pruned. All other entries go to
the Bit Bucket."
:type '(repeat symbol))