You could try storing them in google memcache, nothing will trigger an app to pick up new values unless you redeploy.
You can write application code that polls memcache every X interval to update the values. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/596ebdd2-729c-4eea-909a-8ca6bd543257%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
