Memcache works like an LRU cache, but I don't see why a would force out b unless you ran out of space.
Also, App Engine's Memcache has 2 LRU structures: an app specific LRU and a global LRU for that Memcache instance. Ikai Lan Developer Programs Engineer, Google App Engine Blog: http://googleappengine.blogspot.com Twitter: http://twitter.com/app_engine Reddit: http://www.reddit.com/r/appengine On Fri, Jul 22, 2011 at 1:05 PM, Andrin von Rechenberg <andri...@gmail.com>wrote: > Hey there > > I'm building something like "Google Analytics" for Appengine but in real > time > (Including qps, hourly & daily graphs, backend counters, monitors with > alerts, etc...) > The cool thing is that it only uses memcache to increase counters/stats so > its > really quick to use in prod code. Every minute I gather all counters and > write them to datastore. > It seems to work perfectly for my app (~250qps with about 1000 different > counters, and about > 1000 counter increases per second) > I can also measure how correct my data is (if stuff flushed in memcache, > but so far that never happened), > but it's all based on one assumption: > > If I call: > > memcache.incr("a", intitail_value=0) > ... > memcache.incr("b", initial_value=0) > .... > memcache.incr("b", initial_value=0) > .... > > *if "a" is still in the memcache "b" will also be in the memcache and wont > have been flushed, correct?* > * > * > or in other words: If the entity size for two items in the memcache is the > same, > does the memcache work like either a LRU or FIFO cache? > > Any response is greatly appreciated... > > -Andrin > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to google-appengine@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
