每天都有进步之Redis 服务器的使用

矫情吗；* 2023-05-31 10:18 72阅读 0赞

# Redis 服务器 #

Redis 服务器命令主要是用于管理 redis 服务。

### 实例 ###

以下实例演示了如何获取 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

## Redis 服务器命令 ##

下表列出了 redis 服务器的相关命令:

<table> 
 <tbody> 
 <tr> 
 <th>序号</th> 
 <th>命令及描述</th> 
 </tr> 
 <tr> 
 <td>1</td> 
 <td><a href="https://www.runoob.com/redis/server-bgrewriteaof.html" rel="nofollow">BGREWRITEAOF</a> 异步执行一个 AOF（AppendOnly File） 文件重写操作</td> 
 </tr> 
 <tr> 
 <td>2</td> 
 <td><a href="https://www.runoob.com/redis/server-bgsave.html" rel="nofollow">BGSAVE</a> 在后台异步保存当前数据库的数据到磁盘</td> 
 </tr> 
 <tr> 
 <td>3</td> 
 <td><a href="https://www.runoob.com/redis/server-client-kill.html" rel="nofollow">CLIENT KILL [ip:port] [ID client-id]</a> 关闭客户端连接</td> 
 </tr> 
 <tr> 
 <td>4</td> 
 <td><a href="https://www.runoob.com/redis/server-client-list.html" rel="nofollow">CLIENT LIST</a> 获取连接到服务器的客户端连接列表</td> 
 </tr> 
 <tr> 
 <td>5</td> 
 <td><a href="https://www.runoob.com/redis/server-client-getname.html" rel="nofollow">CLIENT GETNAME</a> 获取连接的名称</td> 
 </tr> 
 <tr> 
 <td>6</td> 
 <td><a href="https://www.runoob.com/redis/server-client-pause.html" rel="nofollow">CLIENT PAUSE timeout</a> 在指定时间内终止运行来自客户端的命令</td> 
 </tr> 
 <tr> 
 <td>7</td> 
 <td><a href="https://www.runoob.com/redis/server-client-setname.html" rel="nofollow">CLIENT SETNAME connection-name</a> 设置当前连接的名称</td> 
 </tr> 
 <tr> 
 <td>8</td> 
 <td><a href="https://www.runoob.com/redis/server-cluster-slots.html" rel="nofollow">CLUSTER SLOTS</a> 获取集群节点的映射数组</td> 
 </tr> 
 <tr> 
 <td>9</td> 
 <td><a href="https://www.runoob.com/redis/server-command.html" rel="nofollow">COMMAND</a> 获取 Redis 命令详情数组</td> 
 </tr> 
 <tr> 
 <td>10</td> 
 <td><a href="https://www.runoob.com/redis/server-command-count.html" rel="nofollow">COMMAND COUNT</a> 获取 Redis 命令总数</td> 
 </tr> 
 <tr> 
 <td>11</td> 
 <td><a href="https://www.runoob.com/redis/server-command-getkeys.html" rel="nofollow">COMMAND GETKEYS</a> 获取给定命令的所有键</td> 
 </tr> 
 <tr> 
 <td>12</td> 
 <td><a href="https://www.runoob.com/redis/server-time.html" rel="nofollow">TIME</a> 返回当前服务器时间</td> 
 </tr> 
 <tr> 
 <td>13</td> 
 <td><a href="https://www.runoob.com/redis/server-command-info.html" rel="nofollow">COMMAND INFO command-name [command-name ...]</a> 获取指定 Redis 命令描述的数组</td> 
 </tr> 
 <tr> 
 <td>14</td> 
 <td><a href="https://www.runoob.com/redis/server-config-get.html" rel="nofollow">CONFIG GET parameter</a> 获取指定配置参数的值</td> 
 </tr> 
 <tr> 
 <td>15</td> 
 <td><a href="https://www.runoob.com/redis/server-config-rewrite.html" rel="nofollow">CONFIG REWRITE</a> 对启动 Redis 服务器时所指定的 redis.conf 配置文件进行改写</td> 
 </tr> 
 <tr> 
 <td>16</td> 
 <td><a href="https://www.runoob.com/redis/server-config-set.html" rel="nofollow">CONFIG SET parameter value</a> 修改 redis 配置参数，无需重启</td> 
 </tr> 
 <tr> 
 <td>17</td> 
 <td><a href="https://www.runoob.com/redis/server-config-resetstat.html" rel="nofollow">CONFIG RESETSTAT</a> 重置 INFO 命令中的某些统计数据</td> 
 </tr> 
 <tr> 
 <td>18</td> 
 <td><a href="https://www.runoob.com/redis/server-dbsize.html" rel="nofollow">DBSIZE</a> 返回当前数据库的 key 的数量</td> 
 </tr> 
 <tr> 
 <td>19</td> 
 <td><a href="https://www.runoob.com/redis/server-debug-object.html" rel="nofollow">DEBUG OBJECT key</a> 获取 key 的调试信息</td> 
 </tr> 
 <tr> 
 <td>20</td> 
 <td><a href="https://www.runoob.com/redis/server-debug-segfault.html" rel="nofollow">DEBUG SEGFAULT</a> 让 Redis 服务崩溃</td> 
 </tr> 
 <tr> 
 <td>21</td> 
 <td><a href="https://www.runoob.com/redis/server-flushall.html" rel="nofollow">FLUSHALL</a> 删除所有数据库的所有key</td> 
 </tr> 
 <tr> 
 <td>22</td> 
 <td><a href="https://www.runoob.com/redis/server-flushdb.html" rel="nofollow">FLUSHDB</a> 删除当前数据库的所有key</td> 
 </tr> 
 <tr> 
 <td>23</td> 
 <td><a href="https://www.runoob.com/redis/server-info.html" rel="nofollow">INFO [section]</a> 获取 Redis 服务器的各种信息和统计数值</td> 
 </tr> 
 <tr> 
 <td>24</td> 
 <td><a href="https://www.runoob.com/redis/server-lastsave.html" rel="nofollow">LASTSAVE</a> 返回最近一次 Redis 成功将数据保存到磁盘上的时间，以 UNIX 时间戳格式表示</td> 
 </tr> 
 <tr> 
 <td>25</td> 
 <td><a href="https://www.runoob.com/redis/server-monitor.html" rel="nofollow">MONITOR</a> 实时打印出 Redis 服务器接收到的命令，调试用</td> 
 </tr> 
 <tr> 
 <td>26</td> 
 <td><a href="https://www.runoob.com/redis/server-role.html" rel="nofollow">ROLE</a> 返回主从实例所属的角色</td> 
 </tr> 
 <tr> 
 <td>27</td> 
 <td><a href="https://www.runoob.com/redis/server-save.html" rel="nofollow">SAVE</a> 同步保存数据到硬盘</td> 
 </tr> 
 <tr> 
 <td>28</td> 
 <td><a href="https://www.runoob.com/redis/server-shutdown.html" rel="nofollow">SHUTDOWN [NOSAVE] [SAVE]</a> 异步保存数据到硬盘，并关闭服务器</td> 
 </tr> 
 <tr> 
 <td>29</td> 
 <td><a href="https://www.runoob.com/redis/server-slaveof.html" rel="nofollow">SLAVEOF host port</a> 将当前服务器转变为指定服务器的从属服务器(slave server)</td> 
 </tr> 
 <tr> 
 <td>30</td> 
 <td><a href="https://www.runoob.com/redis/server-showlog.html" rel="nofollow">SLOWLOG subcommand [argument]</a> 管理 redis 的慢日志</td> 
 </tr> 
 <tr> 
 <td>31</td> 
 <td><a href="https://www.runoob.com/redis/server-sync.html" rel="nofollow">SYNC</a> 用于复制功能(replication)的内部命令</td> 
 </tr> 
 </tbody> 
</table>