redis和memcached初始化内存比较
$ redis-stat
------- data ------ --------------------- load -------------------- - child -
keys mem clients blocked requests connections
3 1.30M 1 0 150000 (+150000) 751
3 1.30M 1 0 150001 (+1) 751
3 1.30M 1 0 150002 (+1) 751



$ ps -ef | grep memc
501 28585 1 0 0:00.00 ?? 0:00.00 memcached -d
501 28596 15675 0 0:00.00 ttys010 0:00.00 grep memc
$ vmmap 28585 | tail -n 2
DefaultMallocZone_0x100065000 18.0M 179 1235K 6%



redis默认比memcachd低多了