127.0.0.1:6379> info
# Server
redis_version:4.0.10
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:78f929682038f688
redis_mode:standalone
os:Linux 3.10.0-862.el7.x86_64 x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:4.8.5
process_id:15
run_id:05da6e9b31ee39c2aa34c07c737dcb18e80e065a
tcp_port:6379
uptime_in_seconds:18190
uptime_in_days:0
hz:10
lru_clock:6251400
executable:/usr/local/redis/bin/redis-server
config_file:/usr/local/redis/etc/redis.conf

# Clients
connected_clients:1
client_longest_output_list:0
client_biggest_input_buf:0
blocked_clients:0

# Memory
used_memory:849480
used_memory_human:829.57K
used_memory_rss:8011776
used_memory_rss_human:7.64M
used_memory_peak:849480
used_memory_peak_human:829.57K
used_memory_peak_perc:100.12%
used_memory_overhead:836246
used_memory_startup:786616
used_memory_dataset:13234
used_memory_dataset_perc:21.05%
total_system_memory:3937439744
total_system_memory_human:3.67G
used_memory_lua:37888
used_memory_lua_human:37.00K
maxmemory:0
maxmemory_human:0B
maxmemory_policy:noeviction
mem_fragmentation_ratio:9.43
mem_allocator:jemalloc-4.0.3
active_defrag_running:0
lazyfree_pending_objects:0

# Persistence
loading:0
rdb_changes_since_last_save:0
rdb_bgsave_in_progress:0
rdb_last_save_time:1583291514
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:-1
rdb_current_bgsave_time_sec:-1
rdb_last_cow_size:0
aof_enabled:1
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
aof_last_cow_size:0
aof_current_size:0
aof_base_size:0
aof_pending_rewrite:0
aof_buffer_length:0
aof_rewrite_buffer_length:0
aof_pending_bio_fsync:0
aof_delayed_fsync:0

# Stats
total_connections_received:1
total_commands_processed:2
instantaneous_ops_per_sec:0
total_net_input_bytes:58
total_net_output_bytes:10168
instantaneous_input_kbps:0.00
instantaneous_output_kbps:0.00
rejected_connections:0
sync_full:0
sync_partial_ok:0
sync_partial_err:0
expired_keys:0
expired_stale_perc:0.00
expired_time_cap_reached_count:0
evicted_keys:0
keyspace_hits:0
keyspace_misses:0
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:0
migrate_cached_sockets:0
slave_expires_tracked_keys:0
active_defrag_hits:0
active_defrag_misses:0
active_defrag_key_hits:0
active_defrag_key_misses:0

# Replication
role:master
connected_slaves:0
master_replid:e755c6d16b4730c4f24c79e97fedc709254d75db
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:0
second_repl_offset:-1
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0

# CPU
used_cpu_sys:18.99
used_cpu_user:7.63
used_cpu_sys_children:0.00
used_cpu_user_children:0.00

# Cluster
cluster_enabled:0

# Keyspace

127.0.0.1:6379> info replication
# Replication
role:master
connected_slaves:0
master_replid:e755c6d16b4730c4f24c79e97fedc709254d75db
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:0
second_repl_offset:-1
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0

127.0.0.1:6379> client list
id=3 addr=127.0.0.1:35970 fd=8 name= age=352 idle=0 flags=N db=0 sub=0 psub=0 multi=-1 qbuf=0 qbuf-free=32768 obl=0 oll=0 omem=0 events=r cmd=client
127.0.0.1:6379>

# Server
redis_version:2.8.19 ###redis版本号
redis_git_sha1:00000000  ###git SHA1
redis_git_dirty:0   ###git dirty flag
redis_build_id:78796c63e58b72dc
redis_mode:standalone   ###redis运行模式
os:Linux 2.6.32-431.el6.x86_64 x86_64   ###os版本号
arch_bits:64  ###64位架构
multiplexing_api:epoll  ###调用epoll算法
gcc_version:4.4.7   ###gcc版本号
process_id:25899   ###服务器进程PID
run_id:eae356ac1098c13b68f2b00fd7e1c9f93b1c6a2c   ###Redis的随机标识符(用于sentinel和集群)
tcp_port:6379   ###Redis监听的端口号
uptime_in_seconds:6419 ###Redis运行时长(s为单位)
uptime_in_days:0  ###Redis运行时长(天为单位)
hz:10
lru_clock:10737922  ###以分钟为单位的自增时钟,用于LRU管理
config_file:/etc/redis/redis.conf   ###redis配置文件

# Clients
connected_clients:1   ###已连接客户端的数量（不包括通过从属服务器连接的客户端）这个参数也要一定关注，有飙升和明显下降时都会有问题。即使不操作
client_longest_output_list:0   ###当前连接的客户端中最长的输出列表
client_biggest_input_buf:0   ###当前连接的客户端中最大的。输出缓存
blocked_clients:0  ###正在等待阻塞命令（BLPOP、BRPOP、BRPOPLPUSH）的客户端的数量 需监控

# Memory
used_memory:2281560   ###由 Redis 分配器分配的内存总量，以字节（byte）为单位
used_memory_human:2.18M   ###以更友好的格式输出redis占用的内存
used_memory_rss:2699264   ###从操作系统的角度，返回 Redis 已分配的内存总量（俗称常驻集大小）。这个值和 top 、 ps 等命令的输出一致，包含了used_memory和内存碎片。
used_memory_peak:22141272  ### Redis 的内存消耗峰值（以字节为单位）
used_memory_peak_human:21.12M  ###以更友好的格式输出redis峰值内存占用
used_memory_lua:35840  ###LUA引擎所使用的内存大小
mem_fragmentation_ratio:1.18  ###   =used_memory_rss /used_memory 这两个参数都包含保存用户k-v数据的内存和redis内部不同数据结构需要占用的内存，并且RSS指的是包含操作系统给redis实例分配的内存，这里面还包含不连续分配所带来的开销。因此在理想情况下， used_memory_rss 的值应该只比 used_memory 稍微高一点儿。当 rss > used ，且两者的值相差较大时，表示存在（内部或外部的）内存碎片。内存碎片的比率可以通过 mem_fragmentation_ratio 的值看出。当 used > rss 时，表示 Redis 的部分内存被操作系统换出到交换空间了，在这种情况下，操作可能会产生明显的延迟。可以说这个值大于1.5或者小于1都是有问题的。当大于1.5的时候需要择机进行服务器重启。当小于1的时候需要对redis进行数据清理
mem_allocator:jemalloc-3.6.0

# Persistence
loading:0  ###记录服务器是否正在载入持久化文件，1为正在加载
rdb_changes_since_last_save:0   ###距离最近一次成功创建持久化文件之后，产生了多少次修改数据集的操作
rdb_bgsave_in_progress:0   ###记录了服务器是否正在创建 RDB 文件，1为正在进行
rdb_last_save_time:1420023749  ###最近一次成功创建 RDB 文件的 UNIX 时间戳
rdb_last_bgsave_status:ok   ###最近一次创建 RDB 文件的结果是成功还是失败,失败标识为err，这个时候写入redis 的操作可能会停止，因为默认stop-writes-on-bgsave-error是开启的，这个时候如果需要尽快恢复写操作，可以手工将这个选项设置为no。
rdb_last_bgsave_time_sec:0  ###最近一次创建 RDB 文件耗费的秒数
rdb_current_bgsave_time_sec:-1  ###如果服务器正在创建 RDB 文件，那么这个域记录的就是当前的创建操作已经耗费的秒数
aof_enabled:1   ###AOF 是否处于打开状态，1为启用
aof_rewrite_in_progress:0   ###服务器是否正在创建 AOF 文件
aof_rewrite_scheduled:0   ###RDB 文件创建完毕之后，是否需要执行预约的 AOF 重写操作（因为在RDB时aof的rewrite会被阻塞一直到RDB结束）
aof_last_rewrite_time_sec:-1  ###最近一次创建 AOF 文件耗费的时长
aof_current_rewrite_time_sec:-1  ###如果服务器正在创建 AOF 文件，那么这个域记录的就是当前的创建操作已经耗费的秒数
aof_last_bgrewrite_status:ok  ###最近一次创建 AOF 文件的结果是成功还是失败
aof_last_write_status:ok 
aof_current_size:176265  ###AOF 文件目前的大小
aof_base_size:176265  ###服务器启动时或者 AOF 重写最近一次执行之后，AOF 文件的大小
aof_pending_rewrite:0  ###是否有 AOF 重写操作在等待 RDB 文件创建完毕之后执行
aof_buffer_length:0   ###AOF 缓冲区的大小
aof_rewrite_buffer_length:0  ###AOF 重写缓冲区的大小
aof_pending_bio_fsync:0  ###后台 I/O 队列里面，等待执行的 fsync 调用数量
aof_delayed_fsync:0###被延迟的 fsync 调用数量
loading_start_time:1441769386   loading启动时间戳
loading_total_bytes:1787767808   loading需要加载数据量
loading_loaded_bytes:1587418182  已经加载的数据量
loading_loaded_perc:88.79 加载百分比
loading_eta_seconds:7   剩余时间

# Stats
total_connections_received:8466  ###服务器已接受的连接请求数量，注意这是个累计值。
total_commands_processed:900668   ###服务器已执行的命令数量，这个数值需要持续监控，如果在一段时间内出现大范围波动说明系统要么出现大量请求，要么出现执行缓慢的操作。
instantaneous_ops_per_sec:1   ###服务器每秒钟执行的命令数量
total_net_input_bytes:82724170
total_net_output_bytes:39509080
instantaneous_input_kbps:0.07
instantaneous_output_kbps:0.02
rejected_connections:0  ###因为最大客户端数量限制而被拒绝的连接请求数量
sync_full:2
sync_partial_ok:0
sync_partial_err:0
expired_keys:0   ###因为过期而被自动删除的数据库键数量
evicted_keys:0   ###因为最大内存容量限制而被驱逐（evict）的键数量。这个数值如果不是0则说明maxmemory被触发，并且    evicted_keys一直大于0，则系统的latency增加，此时可以临时提高最大内存，但这只是临时措施，需要从应用着手分析。
keyspace_hits:0  ###查找数据库键成功的次数。可以计算命中率
keyspace_misses:500000   ###查找数据库键失败的次数。
pubsub_channels:0  ###目前被订阅的频道数量
pubsub_patterns:0  ###目前被订阅的模式数量
latest_fork_usec:402  ###最近一次 fork() 操作耗费的毫秒数

# Replication
role:master   ###如果当前服务器没有在复制任何其他服务器，那么这个域的值就是 master ；否则的话，这个域的值就是 slave 。注意，在创建复制链的时候，一个从服务器也可能是另一个服务器的主服务器
connected_slaves:2   ###2个slaves
slave0:ip=192.168.65.130,port=6379,state=online,offset=1639,lag=1
slave1:ip=192.168.65.129,port=6379,state=online,offset=1639,lag=0
master_repl_offset:1639
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:2
repl_backlog_histlen:1638

# CPU
used_cpu_sys:41.87  ###Redis 服务器耗费的系统 CPU
used_cpu_user:17.82  ###Redis 服务器耗费的用户 CPU
used_cpu_sys_children:0.01  ###后台进程耗费的系统 CPU
used_cpu_user_children:0.01  ###后台进程耗费的用户 CPU

# Keyspace
db0:keys=3101,expires=0,avg_ttl=0   ###keyspace 部分记录了数据库相关的统计信息，比如数据库的键数量、数据库过期键数量等

[root@ip172.17.0.1 ~]# ./redis-cli  -a Authorpharse -h 127.0.0.1
Warning: Using a password with '-a' option on the command line interface may not be safe.
127.0.0.1:6379> info
# Server
redis_version:4.0.10
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:78f929682038f688
redis_mode:standalone
os:Linux 3.10.0-1062.el7.x86_64 x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:4.8.5
process_id:14
run_id:265675038fe99eec5bbded32a5cc08a8b1c79d7c
tcp_port:6379
uptime_in_seconds:767251
uptime_in_days:8
hz:10
lru_clock:6251635
executable:/usr/local/redis/bin/redis-server
config_file:/usr/local/redis/etc/redis.conf

# Clients
connected_clients:5
client_longest_output_list:0
client_biggest_input_buf:0
blocked_clients:0

# Memory
used_memory:2218648
used_memory_human:2.12M
used_memory_rss:4661248
used_memory_rss_human:4.45M
used_memory_peak:2516584
used_memory_peak_human:2.40M
used_memory_peak_perc:88.16%
used_memory_overhead:1993762
used_memory_startup:786600
used_memory_dataset:224886
used_memory_dataset_perc:15.70%
total_system_memory:8201601024
total_system_memory_human:7.64G
used_memory_lua:37888
used_memory_lua_human:37.00K
maxmemory:0
maxmemory_human:0B
maxmemory_policy:noeviction
mem_fragmentation_ratio:2.10
mem_allocator:jemalloc-4.0.3
active_defrag_running:0
lazyfree_pending_objects:0

# Persistence
loading:0
rdb_changes_since_last_save:37469
rdb_bgsave_in_progress:0
rdb_last_save_time:1582542689
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:0
rdb_current_bgsave_time_sec:-1
rdb_last_cow_size:458752
aof_enabled:1
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
aof_last_cow_size:0
aof_current_size:10973878
aof_base_size:5086899
aof_pending_rewrite:0
aof_buffer_length:0
aof_rewrite_buffer_length:0
aof_pending_bio_fsync:0
aof_delayed_fsync:0

# Stats
total_connections_received:1543333
total_commands_processed:3980755
instantaneous_ops_per_sec:3
total_net_input_bytes:102794421
total_net_output_bytes:2421336455
instantaneous_input_kbps:0.10
instantaneous_output_kbps:1.91
rejected_connections:0
sync_full:1
sync_partial_ok:3
sync_partial_err:1
expired_keys:449
expired_stale_perc:0.00
expired_time_cap_reached_count:0
evicted_keys:0
keyspace_hits:40826
keyspace_misses:1475
pubsub_channels:2
pubsub_patterns:0
latest_fork_usec:210
migrate_cached_sockets:0
slave_expires_tracked_keys:0
active_defrag_hits:0
active_defrag_misses:0
active_defrag_key_hits:0
active_defrag_key_misses:0

# Replication
role:master
connected_slaves:1
slave0:ip=172.17.0.1,port=6379,state=online,offset=5378141,lag=0
master_replid:067be2788e5e138e014f2b276ab36be9063a8285
master_replid2:c50b58212c80266e3506b294566d7b04d451e02b
master_repl_offset:5378141
second_repl_offset:1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:4329566
repl_backlog_histlen:1048576

# CPU
used_cpu_sys:950.43
used_cpu_user:502.72
used_cpu_sys_children:0.00
used_cpu_user_children:0.00

# Cluster
cluster_enabled:0

# Keyspace
db0:keys=1,expires=0,avg_ttl=0
db3:keys=484,expires=26,avg_ttl=62263125
127.0.0.1:6379>

[root@ip172.17.0.1 ~]# /usr/local/redis/bin/redis-cli  -a Authorpharse -h 172.17.0.2
Warning: Using a password with '-a' option on the command line interface may not be safe.
172.17.0.2:6379> info
# Server
redis_version:4.0.10
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:78f929682038f688
redis_mode:standalone
os:Linux 3.10.0-1062.el7.x86_64 x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:4.8.5
process_id:15
run_id:f040af49ba9f87b82816322547ad82dc22017f8f
tcp_port:6379
uptime_in_seconds:767477
uptime_in_days:8
hz:10
lru_clock:6251861
executable:/usr/local/redis/bin/redis-server
config_file:/usr/local/redis/etc/redis.conf

# Clients
connected_clients:2
client_longest_output_list:0
client_biggest_input_buf:0
blocked_clients:0

# Memory
used_memory:2137672
used_memory_human:2.04M
used_memory_rss:4145152
used_memory_rss_human:3.95M
used_memory_peak:2187112
used_memory_peak_human:2.09M
used_memory_peak_perc:97.74%
used_memory_overhead:1926360
used_memory_startup:786600
used_memory_dataset:211312
used_memory_dataset_perc:15.64%
total_system_memory:8201592832
total_system_memory_human:7.64G
used_memory_lua:37888
used_memory_lua_human:37.00K
maxmemory:0
maxmemory_human:0B
maxmemory_policy:noeviction
mem_fragmentation_ratio:1.94
mem_allocator:jemalloc-4.0.3
active_defrag_running:0
lazyfree_pending_objects:0

# Persistence
loading:0
rdb_changes_since_last_save:37985
rdb_bgsave_in_progress:0
rdb_last_save_time:1582542688
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:-1
rdb_current_bgsave_time_sec:-1
rdb_last_cow_size:0
aof_enabled:1
aof_rewrite_in_progress:0
aof_rewrite_scheduled:0
aof_last_rewrite_time_sec:0
aof_current_rewrite_time_sec:-1
aof_last_bgrewrite_status:ok
aof_last_write_status:ok
aof_last_cow_size:159744
aof_current_size:5901073
aof_base_size:11755
aof_pending_rewrite:0
aof_buffer_length:0
aof_rewrite_buffer_length:0
aof_pending_bio_fsync:0
aof_delayed_fsync:0

# Stats
total_connections_received:1534130
total_commands_processed:3182908
instantaneous_ops_per_sec:2
total_net_input_bytes:94369701
total_net_output_bytes:76469424
instantaneous_input_kbps:0.07
instantaneous_output_kbps:0.08
rejected_connections:0
sync_full:0
sync_partial_ok:0
sync_partial_err:0
expired_keys:0
expired_stale_perc:0.00
expired_time_cap_reached_count:0
evicted_keys:0
keyspace_hits:2
keyspace_misses:0
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:198
migrate_cached_sockets:0
slave_expires_tracked_keys:0
active_defrag_hits:0
active_defrag_misses:0
active_defrag_key_hits:0
active_defrag_key_misses:0

# Replication
role:slave
master_host:172.17.0.1
master_port:6379
master_link_status:up
master_last_io_seconds_ago:9
master_sync_in_progress:0
slave_repl_offset:5380168
slave_priority:100
slave_read_only:1
connected_slaves:0
master_replid:067be2788e5e138e014f2b276ab36be9063a8285
master_replid2:c50b58212c80266e3506b294566d7b04d451e02b
master_repl_offset:5380168
second_repl_offset:1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:4331593
repl_backlog_histlen:1048576

# CPU
used_cpu_sys:942.63
used_cpu_user:343.40
used_cpu_sys_children:0.00
used_cpu_user_children:0.00

# Cluster
cluster_enabled:0

# Keyspace
db0:keys=1,expires=0,avg_ttl=0
db3:keys=484,expires=26,avg_ttl=0
172.17.0.2:6379>

172.17.0.2:6379> info replication
# Replication
role:slave
master_host:172.17.0.1:6379
master_port:6379
master_link_status:up
master_last_io_seconds_ago:2
master_sync_in_progress:0
slave_repl_offset:5383210
slave_priority:100
slave_read_only:1
connected_slaves:0
master_replid:067be2788e5e138e014f2b276ab36be9063a8285
master_replid2:c50b58212c80266e3506b294566d7b04d451e02b
master_repl_offset:5383210
second_repl_offset:1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:4334635
repl_backlog_histlen:1048576
172.17.0.2:6379>

172.17.0.2:6379> client list
id=7 addr=172.17.0.1:6379 fd=7 name= age=767938 idle=9 flags=M db=3 sub=0 psub=0 multi=-1 qbuf=0 qbuf-free=0 obl=0 oll=0 omem=0 events=r cmd=ping  #master_slave
id=1534124 addr=172.17.0.1:6379:44030 fd=8 name= age=467 idle=0 flags=N db=0 sub=0 psub=0 multi=-1 qbuf=0 qbuf-free=32768 obl=0 oll=0 omem=0 events=r cmd=client  #redis-cli 连接。
172.17.0.2:6379>