info

Overview ¶

*

The current implementation is tested with redis 3.0.7 More details on all the fields provided by the redis info command can be found here: http://redis.io/commands/INFO

`info.go` uses the Redis `INFO default` command for stats. This allows us to fetch all metrics at once and filter out undesired metrics based on user configuration on the client. The alternative would be to fetch each type as an independent `INFO` call, which has the potential of introducing higher latency (e.g., more round trip Redis calls).

There's a special case for the `keyspace` stat, which requires additional parsing because the values are overloaded: (keys=795341,expires=0,avg_ttl=0). This is handled in `eventMapping()`.

The document sent to elasticsearch has the following structure:

{
  "metricset": "info",
  "module": "redis",
  "redis-info": {
    "clients": {
      "blocked_clients": "0",
      "client_biggest_input_buf": "0",
      "client_longest_output_list": "0",
      "connected_clients": "3"
    },
    "cluster": {
      "cluster_enabled": "0"
    },
    "cpu": {
      "used_cpu_sys": "210.63",
      "used_cpu_sys_children": "0.00",
      "used_cpu_user": "113.11",
      "used_cpu_user_children": "0.00"
    },
    "memory": {
      "mem_allocator": "libc",
      "used_memory": "1043200",
      "used_memory_lua": "36864",
      "used_memory_peak": "1164080",
      "used_memory_rss": "778240"
    },
    "presistence": {
      "aof_current_rewrite_time_sec": "-1",
      "aof_enabled": "0",
      "aof_last_bgrewrite_status": "ok",
      "aof_last_rewrite_time_sec": "-1",
      "aof_last_write_status": "ok",
      "aof_rewrite_in_progress": "0",
      "aof_rewrite_scheduled": "0",
      "loading": "0",
      "rdb_bgsave_in_progress": "0",
      "rdb_changes_since_last_save": "1",
      "rdb_current_bgsave_time_sec": "-1",
      "rdb_last_bgsave_status": "ok",
      "rdb_last_bgsave_time_sec": "0",
      "rdb_last_save_time": "1456758970"
    },
    "replication": {
      "connected_slaves": "0",
      "master_repl_offset": "0",
      "repl_backlog_active": "0",
      "repl_backlog_first_byte_offset": "0",
      "repl_backlog_histlen": "0",
      "repl_backlog_size": "1048576",
      "role": "master"
    },
    "server": {
      "arch_bits": "64",
      "config_file": "",
      "gcc_version": "4.2.1",
      "hz": "10",
      "lru_clock": "13918572",
      "multiplexing_api": "kqueue",
      "os": "Darwin 15.3.0 x86_64",
      "process_id": "1158",
      "redis_build_id": "aa27a151289c9b98",
      "redis_git_dirty": "0",
      "redis_git_sha1": "00000000",
      "redis_mode": "standalone",
      "redis_version": "3.0.7",
      "run_id": "8e1659f076c248591812705a24e545257ee6e090",
      "tcp_port": "6379",
      "uptime_in_days": "20",
      "uptime_in_seconds": "1730008"
    },
    "stats": {
      "evicted_keys": "0",
      "expired_keys": "0",
      "instantaneous_input_kbps": "0.01",
      "instantaneous_ops_per_sec": "0",
      "instantaneous_output_kbps": "1.16",
      "keyspace_hits": "1",
      "keyspace_misses": "0",
      "latest_fork_usec": "376",
      "migrate_cached_sockets": "0",
      "pubsub_channels": "0",
      "pubsub_patterns": "0",
      "rejected_connections": "0",
      "sync_full": "0",
      "sync_partial_err": "0",
      "sync_partial_ok": "0",
      "total_commands_processed": "151",
      "total_connections_received": "146",
      "total_net_input_bytes": "2247",
      "total_net_output_bytes": "277354"
    },
	"keyspace": {
	  "db0": {
	    "avg_ttl": 0,
		"expires": 0,
		"keys": 1
	  },
	  "db1": {
		"avg_ttl": 0,
		"expires": 0,
		"keys": 1
	  }
    }
  }
}