sorry to get back at this discussion so late, but i have another question in relation to this behavior / operation, so how would one effectively design a correct memcaching of data from the data store? is it just,
evaluate all items in the memcache set, and if there is no "none" then OK. else repeat the GQL operation then reset all memcache items again in the memcache set. is this the only way? On Oct 28, 6:07 pm, "Nick Johnson (Google)" <[email protected]> wrote: > Hi loell, > > Memcache is, as the name implies, a cache. Any key may be evicted at any > time, though frequently read keys will be evicted less often. You should not > design your app to rely on the persistence of memcache entries. > > -Nick Johnson > > > > On Tue, Oct 27, 2009 at 11:02 PM, loell <[email protected]> wrote: > > > Currently I only cache roughly 349 items with the total size of only > > 2.9 KB. which is more puzzling as it's just a single dot in the total > > memcache size quota of 10 MB :( > > > I'm beginning to think that maybe this particular web app is sitting > > on an unstable part of the cloud? I even don't have a cron Job or a > > task queue yet, that might affect memcache items. > > > On Oct 28, 2:19 am, Wooble <[email protected]> wrote: > > > How much are you caching? Items are removed from the cache when > > > you're storing too much (I don't believe there's a published limit, > > > but I've seen anecdotal claims of 10MB), with the least recently used > > > items evicted first. > > > > On Oct 27, 1:56 pm, loell <[email protected]> wrote: > > > > > additional info: the Items in question are still retrievable in just a > > > > couple of minutes, usually. but after that, it just returns none. > > > > while part of the items in that set is still retrievable and all other > > > > memcache sets are still intact. > > > > > On Oct 28, 1:48 am, loell <[email protected]> wrote: > > > > > > hi, being used to the development's server, handling of memcache, and > > > > > that memcache items stays as long as it can. I'm really puzzled why > > > > > some of my items returns "None" while part of that particular > > memcache- > > > > > set is still retrievable on the production server. is this normal? > > -- > Nick Johnson, Developer Programs Engineer, App Engine > Google Ireland Ltd. :: Registered in Dublin, Ireland, Registration Number: > 368047 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" 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/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
