In memcached (appengine api implementation), how does expiration interact with incr()? There isn't a time argument for incr(), but what happens if I add the key with another call rather than using the initial_value param, like so:
memcache.add('testcounter', 0, time=60*90)
newcnt = memcache.incr('testcounter')
will testcounter still expire in 90 minutes? Whether or not I call this again in that time?