On Sun, 2009-03-22 at 00:17 -0700, rihad wrote: > From Django Book http://www.djangobook.com/en/2.0/chapter15/ : > > > CACHE_BACKEND = "locmem:///?timeout=30&max_entries=400" > > but, a bit later: > > > Then, add the following required settings to your Django settings file: > > * CACHE_MIDDLEWARE_SECONDS — The number of seconds each page should be > > cached. > > > Why have two seemingly identical settings? Do I have to make sure > they're equal? What if they aren't? Or is the timeout= the cached > object lifetime per se, but CACHE_MIDDLEWARE_SECONDS is what is > actually told to web caches?
The CACHE_MIDDLEWARE_SECONDS is used to compute the HTTP cache header times. The caching middleware that it refers to (in the name) is for short-circuiting computation using HTTP-level caching headers. It uses Django's low-level cache, but is not the same thing. > Sorry I couldn't grasp the idea after > rereading The Book. > > > Another relevant q'n: can I configure the cache to expire at > appropriate time intervals, without coding the logic? Say, there's an > external event happening every 15 minutes that updates the original > data Django processes; can Django be configured to give web clients > the correct cache TTL? Example: the resource is regenerated externally > at 11:00:00. At 11:00:01 a client accesses it and it should be given > cache timeout up until 11:15:00, that is, 899 seconds. Client > accessing at 11:00:02 should be given timeout 898 seconds, and so on. > Then at 11:15:00 the resource is regenerated again and it comes full > circle until 11:30:00 this time, and so on. No, it doesn't work this way. If you want per-object cache times to be set specifically, you should write your own view decorator or utility function to do so. Regards, Malcolm --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---