Redis中Key占用情况查看（redis查看key占比）

Redis中Key占用情况查看

Redis是一个基于内存的数据结构存储系统，因此它的性能非常高。在Redis中，存储的数据都是键值对，这些键值对都会被存储在内存中。由于Redis的内存使用率非常高，因此了解Redis中键的占用情况对于优化性能非常重要。

在Redis中，可以通过不同的命令来查看Key占用情况。其中最常用的命令是info，使用该命令可以查看Redis中的各种统计信息，包括内存占用情况、键的数量、网络连接数等。

下面是一个使用info命令查看Redis键占用情况的例子：

127.0.0.1:6379> info
# Server
redis_version:5.0.5
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:4c37edaad1442544
redis_mode:standalone
os:Windows
arch_bits:64
multiplexing_api:WinSock_IOCP
atomicvar_api:atomic-builtin
gcc_version:0.0.0
process_id:1188
run_id:3b56a409357201c6234ab1f292c7caf30e8206f0
tcp_port:6379
uptime_in_seconds:801
uptime_in_days:0
hz:10
configured_hz:10
lru_clock:2704703
executable:C:\Program Files\Redis\redis-server.exe
config_file:C:\Program Files\Redis\redis.windows.conf

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

# Memory
used_memory:852944
used_memory_human:832.53K
used_memory_rss:2686976
used_memory_rss_human:2.56M
used_memory_peak:852944
used_memory_peak_human:832.53K
used_memory_peak_perc:100.00%
used_memory_overhead:819168
used_memory_startup:791240
used_memory_dataset:33776
used_memory_dataset_perc:23.27%
allocator_allocated:858780
allocator_active:910336
allocator_resident:5242880
total_system_memory:17007457280
total_system_memory_human:15.84G
used_memory_lua:39936
used_memory_lua_human:39.00K
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:1.06
allocator_frag_bytes:51556
allocator_rss_ratio:0.29
allocator_rss_bytes:4331520
rss_overhead_ratio:0.51
rss_overhead_bytes:-2562048
mem_fragmentation_ratio:3.15
mem_allocator:jemalloc-5.1.0
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:1588744333
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:1
total_commands_processed:1
instantaneous_ops_per_sec:0
total_net_input_bytes:55
total_net_output_bytes:2794
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
evicted_keys:0
keyspace_hits:0
keyspace_misses:0
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:0
migrate_cached_sockets:0
# Replication
role:master
connected_slaves:0
master_replid:96e06360ea56d04ec7c1d58e68c11bceffc4d9ec
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:0.015625
used_cpu_user:0.031250
used_cpu_sys_children:0.000000
used_cpu_user_children:0.000000

# Cluster
cluster_enabled:0
# Keyspace
db0:keys=1,expires=0,avg_ttl=0