How to clear memcache and redis without restarting service.
Clear Memcache
telnet 172.25.16.191 11211 Trying 172.25.16.191... Connected to 172.25.16.191. Escape character is '^]'. flush_all OK quit Connection to localhost closed by foreign host.
Clear Redis Cache
[root@memcache ~]# redis-cli -h 172.25.16.191 172.25.16.191:6379 > flushall OK
