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Redis 服务器命令主要是用于管理 redis 服务。
以下示例演示了如何获取 redis 服务器的统计信息：
redis 127.0.0.1:6379> INFO # Server redis_version:2.8.13 redis_git_sha1:00000000 redis_git_dirty:0 redis_build_id:c2238b38b1edb0e2 redis_mode:standalone os:Linux 3.5.0-48-generic x86_64 arch_bits:64 multiplexing_api:epoll gcc_version:4.7.2 process_id:3856 run_id:0e61abd297771de3fe812a3c21027732ac9f41fe tcp_port:6379 uptime_in_seconds:11554 uptime_in_days:0 hz:10 lru_clock:16651447 config_file: # Clients connected_clients:1 client-longest_output_list:0 client-biggest_input_buf:0 blocked_clients:0 # Memory used_memory:589016 used_memory_human:575.21K used_memory_rss:2461696 used_memory_peak:667312 used_memory_peak_human:651.67K used_memory_lua:33792 mem_fragmentation_ratio:4.18 mem_allocator:jemalloc-3.6.0 # Persistence loading:0 rdb_changes_since_last_save:3 rdb_bgsave_in_progress:0 rdb_last_save_time:1409158561 rdb_last_bgsave_status:ok rdb_last_bgsave_time_sec:0 rdb_current_bgsave_time_sec:-1 aof_enabled:0 aof_rewrite_in_progress:0 aof_rewrite_scheduled:0 aof_last_rewrite_time_sec:-1 aof_current_rewrite_time_sec:-1 aof_last_bgrewrite_status:ok aof_last_write_status:ok # Stats total_connections_received:24 total_commands_processed:294 instantaneous_ops_per_sec:0 rejected_connections:0 sync_full:0 sync_partial_ok:0 sync_partial_err:0 expired_keys:0 evicted_keys:0 keyspace_hits:41 keyspace_misses:82 pubsub_channels:0 pubsub_patterns:0 latest_fork_usec:264 # Replication role:master connected_slaves:0 master_repl_offset:0 repl_backlog_active:0 repl_backlog_size:1048576 repl_backlog_first_byte_offset:0 repl_backlog_histlen:0 # CPU used_cpu_sys:10.49 used_cpu_user:4.96 used_cpu_sys_children:0.00 used_cpu_user_children:0.01 # Keyspace db0:keys=94,expires=1,avg_ttl=41638810 db1:keys=1,expires=0,avg_ttl=0 db3:keys=1,expires=0,avg_ttl=0
下表列出了 redis 服务器的相关命令:
| 序号 | 命令及描述 |
|---|---|
| 1 | BGREWRITEAOF 异步执行一个 AOF（AppendOnly File） 文件重写操作 |
| 2 | BGSAVE 在后台异步保存当前数据库的数据到磁盘 |
| 3 | CLIENT KILL [ip:port] [ID client-id] 关闭客户端连接 |
| 4 | CLIENT LIST 获取连接到服务器的客户端连接列表 |
| 5 | CLIENT GETNAME 获取连接的名称 |
| 6 | CLIENT PAUSE timeout 在指定时间内终止运行来自客户端的命令 |
| 7 | CLIENT SETNAME connection-name 设置当前连接的名称 |
| 8 | CLUSTER SLOTS 获取集群节点的映射数组 |
| 9 | COMMAND 获取 Redis 命令详情数组 |
| 10 | COMMAND COUNT 获取 Redis 命令总数 |
| 11 | COMMAND GETKEYS 获取给定命令的所有键 |
| 12 | TIME 返回当前服务器时间 |
| 13 | COMMAND INFO command-name [command-name ...] 获取指定 Redis 命令描述的数组 |
| 14 | CONFIG GET parameter 获取指定配置参数的值 |
| 15 | CONFIG REWRITE 对启动 Redis 服务器时所指定的 redis.conf 配置文件进行改写 |
| 16 | CONFIG SET parameter value Modify Redis configuration parameters without restarting |
| 17 | CONFIG RESETSTAT Reset some statistics in the INFO command |
| 18 | DBSIZE Return the number of keys in the current database |
| 19 | DEBUG OBJECT key Get debugging information for the key |
| 20 | DEBUG SEGFAULT Cause the Redis service to crash |
| 21 | FLUSHALL Delete all keys in all databases |
| 22 | FLUSHDB Delete all keys in the current database |
| 23 | INFO [section] Get various information and statistics of the Redis server |
| 24 | LASTSAVE Return the time, in UNIX timestamp format, when Redis last successfully saved data to disk |
| 25 | MONITOR Real-time printing of commands received by the Redis server, for debugging purposes |
| 26 | ROLE Return the role of the master-slave example |
| 27 | SAVE Synchronously save data to disk |
| 28 | SHUTDOWN [NOSAVE] [SAVE] Asynchronously save data to disk and shut down the server |
| 29 | SLAVEOF host port Convert the current server to a slave server of the specified server |
| 30 | SLOWLOG subcommand [argument] Manage Redis slow logs |
| 31 | SYNC Internal commands for replication functionality |