需求:将redis内存从1G扩展到3G,不中断服务
# redis-cli -p 6391
redis 127.0.0.1:6391> config get maxmemory
1) "maxmemory"
2) "1073741824"
redis 127.0.0.1:6391> config set maxmemory 3221225472
redis 127.0.0.1:6391> config get maxmemory
1) "maxmemory"
2) "3221225472"
# vim /nh/redis/6391/conf/redis.conf
maxmemory 3221225472