Meaning of redis info

Redis_version: 2.4.16 # redis version
Redis_git_sha1: 00000000
Redis_git_dirty: 0
Arch_bits: 64
Multiplexing_api: epoll
Gcc_version: 4.1.2 # GCC version
Process_id: 10629 # ID of the current redis server process
Uptime_in_seconds: 145830 # running time (seconds)
Uptime_in_days: 1 # running time (days)
Lru_clock: 947459
Used_cpu_sys: 0.02
Used_cpu_user: 0.02
Used_cpu_sys_children: 0.00
Used_cpu_user_children: 0.00
Connected_clients: 1 # number of connected clients
Connected_slaves: 0 # Number of slave instances
Client_longest_output_list: 0
Client_biggest_input_buf: 0
Blocked_clients: 0
Used_memory: 832784 # total memory allocated by redis
Used_memory_human: 813.27 K
Used_memory_rss: 1896448 # total memory allocated by redis (including memory fragments)
Used_memory_peak: 832760
Used_memory_peak_human: 813.24 K # peak value of memory used by redis
Mem_fragmentation_ratio: 2.28 # Memory Fragment Ratio
Mem_allocator: jemalloc-3.0.0
Loading: 0
Aof_enabled: 0 # Whether redis has enabled aof
Changes_since_last_save: 0 # Number of times the command was executed after the database was last saved
Bgsave_in_progress: 0 # Number of save operations in the background
Last_save_time: 1351506041 # time point at which the last successful save is displayed in UNIX timestamp format
Bgrewriteaof_in_progress: 0 # Number of aof file modification operations in the background
Total_connections_received: 1 # Total number of clients connected since running
Total_commands_processed: 1 # Total number of commands executed since running
Expired_keys: 0 # number of keys that have expired since running
Evicted_keys: 0 # number of keys deleted since running
Keyspace_hits: 0 # Number of key hits
Keyspace_misses: 0 # Number of times the key is not hit
Pubsub_channels: 0 # number of channels in use
Pubsub_patterns: 0 # Number of current modes
Latest_fork_usec: 0
Vm_enabled: 0 # Whether VM is enabled (1 is enabled, 0 is disabled)
Role: master # Master or slave of the current instance
Db0: Keys = 183, expires = 0 # number of keys of each database and the number of keys with a lifetime

Meaning of redis info