Redis命令5

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Redis 服务器命令

Redis 服务器命令主要是用于管理 redis 服务。

实例

如何获取 redis 服务器的统计信息：

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127.0.0.1:6379> info
# Server
redis_version:5.0.5
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:6d3bf9e511543b78
redis_mode:standalone
os:Darwin 18.6.0 x86_64
arch_bits:64
multiplexing_api:kqueue
atomicvar_api:atomic-builtin
gcc_version:4.2.1
process_id:65254
run_id:3d46ae00173412623b99d81100173246db224357
tcp_port:6379
uptime_in_seconds:497757
uptime_in_days:5
hz:10
configured_hz:10
lru_clock:4627403
executable:/Users/asher/Desktop/redis-5.0.5/src/./redis-server
config_file:

# Clients
connected_clients:2
client_recent_max_input_buffer:2
client_recent_max_output_buffer:0
blocked_clients:0

# Memory
used_memory:1070656
used_memory_human:1.02M
used_memory_rss:1712128
used_memory_rss_human:1.63M
used_memory_peak:1070656
used_memory_peak_human:1.02M
used_memory_peak_perc:100.03%
used_memory_overhead:1054744
used_memory_startup:987824
used_memory_dataset:15912
used_memory_dataset_perc:19.21%
allocator_allocated:1024592
allocator_active:1674240
allocator_resident:1674240
total_system_memory:8589934592
total_system_memory_human:8.00G
used_memory_lua:37888
used_memory_lua_human:37.00K
used_memory_scripts:0
used_memory_scripts_human:0B
number_of_cached_scripts:0
maxmemory:0
maxmemory_human:0B
maxmemory_policy:noeviction
allocator_frag_ratio:1.63
allocator_frag_bytes:649648
allocator_rss_ratio:1.00
allocator_rss_bytes:0
rss_overhead_ratio:1.02
rss_overhead_bytes:37888
mem_fragmentation_ratio:1.67
mem_fragmentation_bytes:687536
mem_not_counted_for_evict:0
mem_replication_backlog:0
mem_clients_slaves:0
mem_clients_normal:66616
mem_aof_buffer:0
mem_allocator:libc
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:1564893311
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:0
rdb_current_bgsave_time_sec:-1
rdb_last_cow_size:0
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
aof_last_cow_size:0

# Stats
total_connections_received:8
total_commands_processed:214
instantaneous_ops_per_sec:0
total_net_input_bytes:9198
total_net_output_bytes:101508
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:66
keyspace_misses:7
pubsub_channels:1
pubsub_patterns:0
latest_fork_usec:966
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:b65a8be1272fab6dfd7b73b0c51e75d06e370c79
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:36.666434
used_cpu_user:23.420130
used_cpu_sys_children:0.044782
used_cpu_user_children:0.009325

# Cluster
cluster_enabled:0

# Keyspace
db0:keys=6,expires=0,avg_ttl=0
127.0.0.1:6379>

Redis time 命令

用于返回当前服务器时间。可用版本 >= 2.6.0

语法

time

返回值

一个包含两个字符串的列表： 第一个字符串是当前时间(以 UNIX 时间戳格式表示)，而第二个字符串是当前这一秒钟已经逝去的微秒数。

实例

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127.0.0.1:6379> time 
1) "1564908791"
2) "483839"

Redis lastsave 命令

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。可用版本 >= 1.0.0

语法

lastsave

返回值

一个 UNIX 时间戳。

实例

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127.0.0.1:6379> lastsave 
(integer) 1564893311