I think the easiest and cheapest solution is to utilize Heroku's caching layer, Varnish.
http://docs.heroku.com/http-caching If you set the max-timeout to 1 week then your app only gets hit once a week... assuming the sitemaps get hit often enough to keep them in the cache. -- You received this message because you are subscribed to the Google Groups "Heroku" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/heroku?hl=en.
