hi there~ i'm currently studying memcached and redis while studying memcached, i have some question 1. what is proper ratio between memcached and DB? ex) 1Gb(memcached) per 100Gb(real db) 2. memcached support 1ms respond. why? does any service request at least 1ms? 3. memcached uses libevent to get request but redis doesn't use any 3'rd party library. why does memcached use libevent? thanks
