redis info命令介绍

时间复杂度：

O(1)

返回值：

具体请参见下面的测试代码：

redis> INFO
# Server
redis_version:2.5.9
redis_git_sha1:473f3090
redis_git_dirty:0
os:Linux 3.3.7-1-ARCH i686
arch_bits:32
multiplexing_api:epoll
gcc_version:4.7.0
process_id:8104
run_id:bc9e20c6f0aac67d0d396ab950940ae4d1479ad1
tcp_port:6379
uptime_in_seconds:7
uptime_in_days:0
lru_clock:1680564

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

# Memory
used_memory:439304
used_memory_human:429.01K
used_memory_rss:13897728
used_memory_peak:401776
used_memory_peak_human:392.36K
used_memory_lua:20480
mem_fragmentation_ratio:31.64
mem_allocator:jemalloc-3.0.0

# Persistence
loading:0
rdb_changes_since_last_save:0
rdb_bgsave_in_progress:0
rdb_last_save_time:1338011402
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:-1
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

# Stats
total_connections_received:1
total_commands_processed:0
instantaneous_ops_per_sec:0
rejected_connections:0
expired_keys:0
evicted_keys:0
keyspace_hits:0
keyspace_misses:0
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:0

# Replication
role:master
connected_slaves:0

# CPU
used_cpu_sys:0.03
used_cpu_user:0.01
used_cpu_sys_children:0.00
used_cpu_user_children:0.00

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