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install: Do not cache lookup failures. 

Possibly fixes <http://bugs.gnu.org/22209>.

* gnu/system/install.scm (%nscd-minimal-caches)[negative-time-to-live]:
Set to zero.
This commit is contained in:
Ludovic Courtès 2016-02-10 21:21:38 +01:00
parent 8823ed4e12
commit c96ba2cf5e
1 changed files with 6 additions and 1 deletions
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7
gnu/system/install.scm
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@ -237,7 +237,12 @@ the user's target storage device rather than on the RAM disk."
;; Minimal in-memory caching policy for nscd.
(list (nscd-cache (database 'hosts)
(positive-time-to-live (* 3600 12))
(negative-time-to-live 20)
;; Do not cache lookup failures at all since they are
;; quite likely (for instance when someone tries to ping a
;; host before networking is functional.)
(negative-time-to-live 0)
(persistent? #f)
(max-database-size (* 5 (expt 2 20)))))) ;5 MiB