Redis のデータベースをリストアップする方法
Redis はデフォルトで 16 個のデータベースで区切られています。ただ、どのデータベースに中身が詰まっているのか入ってみないと分からんなあと困っていました。そんなときの確認方法がこちら。あ、ちなみにホストは Docker のコンテナを立てているので、services 名がそれになっています。
redis:6379> INFO keyspace
# Keyspace
db1:keys=303,expires=0,avg_ttl=0
db3:keys=20,expires=17,avg_ttl=148815602815
db4:keys=30,expires=20,avg_ttl=1234139002ちなみにこの INFO コマンド、Redis のもろもろの設定が見れるので面白い。
redis:6379> INFO
# Server
redis_version:5.0.0
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:31001cf3c43b60f0
redis_mode:standalone
os:Linux 4.9.184-linuxkit x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:6.4.0
process_id:1
run_id:912c42798a0183b8f042571896aedad7093e205b
tcp_port:6379
uptime_in_seconds:1461
uptime_in_days:0
hz:10
configured_hz:10
lru_clock:9294281
executable:/data/redis-server
config_file:
# Clients
connected_clients:4
client_recent_max_input_buffer:2
client_recent_max_output_buffer:0
blocked_clients:2
# Memory
used_memory:1017312
used_memory_human:993.47K
used_memory_rss:3244032
used_memory_rss_human:3.09M
used_memory_peak:1098200
used_memory_peak_human:1.05M
used_memory_peak_perc:92.63%
used_memory_overhead:911444
used_memory_startup:790856
used_memory_dataset:105868
used_memory_dataset_perc:46.75%
allocator_allocated:1117160
allocator_active:1404928
allocator_resident:4050944
total_system_memory:2095968256
total_system_memory_human:1.95G
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:1.26
allocator_frag_bytes:287768
allocator_rss_ratio:2.88
allocator_rss_bytes:2646016
rss_overhead_ratio:0.80
rss_overhead_bytes:18446744073708744704
mem_fragmentation_ratio:3.33
mem_fragmentation_bytes:2268712
mem_not_counted_for_evict:0
mem_replication_backlog:0
mem_clients_slaves:0
mem_clients_normal:100428
mem_aof_buffer:0
mem_allocator:jemalloc-5.1.0
active_defrag_running:0
lazyfree_pending_objects:0
# Persistence
loading:0
rdb_changes_since_last_save:520
rdb_bgsave_in_progress:0
rdb_last_save_time:1569575112
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:0
rdb_current_bgsave_time_sec:-1
rdb_last_cow_size:442368
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:4
total_commands_processed:7745
instantaneous_ops_per_sec:14
total_net_input_bytes:473737
total_net_output_bytes:158196
instantaneous_input_kbps:0.89
instantaneous_output_kbps:0.27
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:1150
keyspace_misses:575
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:431
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:27bb0c99efeb8c91bad2abac0ce9f1c592812a24
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:1.650000
used_cpu_user:1.680000
used_cpu_sys_children:0.000000
used_cpu_user_children:0.000000
# Cluster
cluster_enabled:0
# Keyspace
db1:keys=303,expires=0,avg_ttl=0
db3:keys=20,expires=17,avg_ttl=150728828870
db4:keys=30,expires=20,avg_ttl=1233593281おお…。