redis 性能指标监控命令

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大家在学习的过程中，一定要学会经常使用help来了解命令的具体用法。

1.info  (监控一般使用这个命令读取数据)

127.0.0.1:6379> help info

 INFO [section]

 summary: Get information and statistics about the server

 since: 1.0.0

 group: server

127.0.0.1:6379> info

# Server

redis_version:3.0.7

redis_git_sha1:00000000

redis_git_dirty:0

redis_build_id:8d64350b19f2f7d2

redis_mode:standalone

os:Linux 2.6.32-504.el6.x86_64 x86_64

arch_bits:64

multiplexing_api:epoll

gcc_version:4.4.7

process_id:1096

run_id:2fc6a6e9638de4b9bccce3def6b40bb7b69e5240

tcp_port:6379

uptime_in_seconds:1668

uptime_in_days:0

hz:10

lru_clock:3766532

config_file:/etc/redis/6379.conf

# Clients

connected_clients:3

client_longest_output_list:0

client_biggest_input_buf:0

blocked_clients:0

# Memory

used_memory:856928

used_memory_human:836.84K

used_memory_rss:3223552

used_memory_peak:856968

used_memory_peak_human:836.88K

used_memory_lua:36864

mem_fragmentation_ratio:3.76

mem_allocator:jemalloc-3.6.0

# Persistence

loading:0

rdb_changes_since_last_save:0

rdb_bgsave_in_progress:0

rdb_last_save_time:1480159872

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

aof_last_bgrewrite_status:ok

aof_last_write_status:ok

# Stats

total_connections_received:2

total_commands_processed:189

instantaneous_ops_per_sec:0

total_net_input_bytes:3340

total_net_output_bytes:66405

instantaneous_input_kbps:0.00

instantaneous_output_kbps:0.04

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:slave

master_host:192.168.1.93

master_port:6380

master_link_status:up

master_last_io_seconds_ago:9

master_sync_in_progress:0

slave_repl_offset:2283

slave_priority:100

slave_read_only:1

connected_slaves:0

master_repl_offset:0

repl_backlog_active:0

repl_backlog_size:1048576

repl_backlog_first_byte_offset:0

repl_backlog_histlen:0

# CPU

used_cpu_sys:0.97

used_cpu_user:0.42

used_cpu_sys_children:0.00

used_cpu_user_children:0.00

# Cluster

cluster_enabled:0

# Keyspace

db0:keys=1,expires=0,avg_ttl=0

2.monitor (影响性能，谨慎使用)

127.0.0.1:6379> help monitor

 MONITOR -

 summary: Listen for all requests received by the server in real time

 since: 1.0.0

 group: server

127.0.0.1:6379> monitor

OK

1480161369.716981 [0 192.168.1.93:6380] "PING"

1480161379.816223 [0 192.168.1.93:6380] "PING"

1480161389.930811 [0 192.168.1.93:6380] "PING"

1480161400.047882 [0 192.168.1.93:6380] "PING"

1480161409.461477 [0 127.0.0.1:42333] "info"

1480161410.143357 [0 192.168.1.93:6380] "PING"

1480161420.267618 [0 192.168.1.93:6380] "PING"

1480161421.141619 [0 127.0.0.1:42333] "info" "all"

1480161430.367934 [0 192.168.1.93:6380] "PING"

1480161440.496221 [0 192.168.1.93:6380] "PING"

3.slowlog

127.0.0.1:6379> help slowlog

 SLOWLOG subcommand [argument]

 summary: Manages the Redis slow queries log

 since: 2.2.12

 group: server

 127.0.0.1:6379> slowlog get

1) 1) (integer) 17

  2) (integer) 1480161791

  3) (integer) 12

  4) 1) "config"

   2) "set"

   3) "slowlog-log-slower-than"

   4) "10"

127.0.0.1:6379> slowlog len

(integer) 2

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