elasticsearch 的查询 /_nodes/stats 各字段意思

/_nodes/stats 字段意思   “”

    1 {  
2     "_nodes": {
3     "total": 1,
    "successful": 1,
    "failed": 0
  },
  "cluster_name": "ELKTEST",
  "nodes": {
    "lnlHC8yERCKXCuAc_2DPCQ": {
      "timestamp": 1534242595995,
      "name": "OPS01-ES01",
      "transport_address": "10.9.125.148:9300",
      "host": "10.9.125.148",
      "ip": "10.9.125.148:9300",
      "roles": [
        "master",
        "data",
        "ingest"
      ],
      "attributes": {
        "ml.machine_memory": "8203104256",
        "xpack.installed": "true",
        "ml.max_open_jobs": "20",
        "ml.enabled": "true"
      },
      "indices": {
        "docs": {
          "count": 8111612,   # 显示节点上有多少文档
          "deleted": 16604    # 有多少已删除的文档还未从数据段中删除
        },
        "store": {
          "size_in_bytes": 2959876263  # 显示该节点消耗了多少物理存储
        },
        "indexing": {       #表示索引文档的次数，这个是通过一个计数器累加计数的。当文档被删除时，它不会减少。注意这个值永远是递增的，发生在内部索引数据的时候，包括那些更新操作
          "index_total": 17703152,
          "index_time_in_millis": 2801934,
          "index_current": 0,
          "index_failed": 0,
          "delete_total": 46242,
          "delete_time_in_millis": 2130,
          "delete_current": 0,
          "noop_update_total": 0,
          "is_throttled": false,
          "throttle_time_in_millis": 0    # 这个值高的时候，说明磁盘流量设置太低
        },
        "get": {
          "total": 185179,
          "time_in_millis": 22341,
          "exists_total": 185178,
          "exists_time_in_millis": 22337,
          "missing_total": 1,
          "missing_time_in_millis": 4,
          "current": 0
        },
        "search": {   
          "open_contexts": 0,   # 主动检索的次数，
          "query_total": 495447,    # 查询总数
          "query_time_in_millis": 298344,   # 节点启动到此查询消耗总时间，  query_time_in_millis / query_total的比值可以作为你的查询效率的粗略指标。比值越大，每个查询用的时间越多，你就需要考虑调整或者优化。
          "query_current": 0,
　　　　　　　　 #后面关于fetch的统计，是描述了查询的第二个过程（也就是query_the_fetch里的fetch)。fetch花的时间比query的越多，表示你的磁盘很慢，或者你要fetch的的文档太多。或者你的查询参数分页条件太大，（例如size等于1万
          "fetch_total": 130194,
          "fetch_time_in_millis": 51211,
          "fetch_current": 0,
          "scroll_total": 22,
          "scroll_time_in_millis": 2196665,
          "scroll_current": 0,
          "suggest_total": 0,
          "suggest_time_in_millis": 0,
          "suggest_current": 0
        },
        "merges": { # 包含lucene段合并的信息，它会告诉你有多少段合并正在进行，参与的文档数，这些正在合并的段的总大小，以及花在merge上的总时间。
　　　　　　　　　　　　　　　 如果你的集群写入比较多，这个merge的统计信息就很重要。merge操作会消耗大量的磁盘io和cpu资源。如果你的索引写入很多，你会看到大量的merge操作
          "current": 0,
          "current_docs": 0,
          "current_size_in_bytes": 0,
          "total": 68341,
          "total_time_in_millis": 18490611,
          "total_docs": 1016579669,
          "total_size_in_bytes": 344453480895,
          "total_stopped_time_in_millis": 0,
          "total_throttled_time_in_millis": 1557,
          "total_auto_throttle_in_bytes": 4345437596
        },
        "refresh": {
          "total": 729643,
          "total_time_in_millis": 7843558,
          "listeners": 0
        },
        "flush": {
          "total": 5161,
          "periodic": 12,
          "total_time_in_millis": 53116
        },
        "warmer": {
          "current": 0,
          "total": 718343,
          "total_time_in_millis": 38069
        },
        "query_cache": {
          "memory_size_in_bytes": 0,
          "total_count": 0,
          "hit_count": 0,
          "miss_count": 0,
          "cache_size": 0,
          "cache_count": 0,
          "evictions": 0
        },
        "fielddata": {   #显示了fielddata使用的内存，fielddata用于聚合、排序等。这里也有一个淘汰数，不像filter_cache，这里的淘汰数很有用，它必须是0或者接近0，因为fielddata 不是缓存，任何淘汰的代价都是很大的，必须要避免的。如果你看到了淘汰，你必须重新评估你的内存情况，关于fielddata的限制，以及查询，或者三者全部。
          "memory_size_in_bytes": 25312,
          "evictions": 0
        },
        "completion": {
          "size_in_bytes": 0
        },
        "segments": { 告诉你当前节点的lucene 段的个数，这可能是一个很重要的数字。大多数的索引应该在50到150个段左右，即便是几T大小的数十亿的文档。大量的段会带来合并的问题（例如：合并赶不上段的产生）。注意这个统计是对一个节点上所有的索引而言的
　　　　　　　　　　　　　　其中内存的统计，可以告诉你Lucene的段自身需要多少内存。这里包括基础的数据结构，包括提交列表，词典，bloom过滤器等。段的数量多会增加承载这些数据结构的开销，这个内存的使用就是对这个开销的度量。
          "count": 1171,
          "memory_in_bytes": 17486054,
          "terms_memory_in_bytes": 11679054,
          "stored_fields_memory_in_bytes": 1628744,
          "term_vectors_memory_in_bytes": 0,
          "norms_memory_in_bytes": 1017280,
          "points_memory_in_bytes": 745044,
          "doc_values_memory_in_bytes": 2415932,
          "index_writer_memory_in_bytes": 42232420,
          "version_map_memory_in_bytes": 10812921,
          "fixed_bit_set_memory_in_bytes": 148136,
          "max_unsafe_auto_id_timestamp": 1534205010926,
          "file_sizes": {}
        },
        "translog": {
          "operations": 2422069,
          "size_in_bytes": 2187759163,
          "uncommitted_operations": 1092028,
          "uncommitted_size_in_bytes": 1116860690,
          "earliest_last_modified_age": 0
        },
        "request_cache": {
          "memory_size_in_bytes": 524054,
          "evictions": 0,
          "hit_count": 157346,
          "miss_count": 15441
        },
        "recovery": {
          "current_as_source": 0,
          "current_as_target": 0,
          "throttle_time_in_millis": 0
        }
      },
      "os": {
        "timestamp": 1534242596057,
        "cpu": {
          "percent": 7,
          "load_average": {
            "1m": 0.02,
            "5m": 0.05,
            "15m": 0.12
          }
        },
        "mem": {
          "total_in_bytes": 8203104256,
          "free_in_bytes": 147980288,
          "used_in_bytes": 8055123968,
          "free_percent": 2,
          "used_percent": 98
        },
        "swap": {
          "total_in_bytes": 536866816,
          "free_in_bytes": 531492864,
          "used_in_bytes": 5373952
        },
        "cgroup": {
          "cpuacct": {
            "control_group": "/",
            "usage_nanos": 47396754950801
          },
          "cpu": {
            "control_group": "/",
            "cfs_period_micros": 100000,
            "cfs_quota_micros": -1,
            "stat": {
              "number_of_elapsed_periods": 0,
              "number_of_times_throttled": 0,
              "time_throttled_nanos": 0
            }
          },
          "memory": {
            "control_group": "/",
            "limit_in_bytes": "9223372036854775807",
            "usage_in_bytes": "7463514112"
          }
        }
      },
      "process": {
        "timestamp": 1534242596058,
        "open_file_descriptors": 1317,
        "max_file_descriptors": 65536,
        "cpu": {
          "percent": 7,
          "total_in_millis": 44676020
        },
        "mem": {
          "total_virtual_in_bytes": 12394913792
        }
      },
      "jvm": {
        "timestamp": 1534242596059,
        "uptime_in_millis": 463947765,
        "mem": {
          "heap_used_in_bytes": 1039819544,
          "heap_used_percent": 19,
          "heap_committed_in_bytes": 5333843968,
          "heap_max_in_bytes": 5333843968,
          "non_heap_used_in_bytes": 186193160,
          "non_heap_committed_in_bytes": 198041600,
          "pools": {
            "young": {
              "used_in_bytes": 179829784,
              "max_in_bytes": 279183360,
              "peak_used_in_bytes": 279183360,
              "peak_max_in_bytes": 279183360
            },
            "survivor": {
              "used_in_bytes": 10640952,
              "max_in_bytes": 34865152,
              "peak_used_in_bytes": 34865152,
              "peak_max_in_bytes": 34865152
            },
            "old": {
              "used_in_bytes": 849348808,
              "max_in_bytes": 5019795456,
              "peak_used_in_bytes": 3773164872,
              "peak_max_in_bytes": 5019795456
            }
          }
        },
        "threads": {
          "count": 118,
          "peak_count": 122
        },
        "gc": {
          "collectors": {
            "young": {
              "collection_count": 92158,
              "collection_time_in_millis": 1728982
            },
            "old": {
              "collection_count": 19,
              "collection_time_in_millis": 2384
            }
          }
        },
        "buffer_pools": {
          "direct": {
            "count": 45,
            "used_in_bytes": 135044601,
            "total_capacity_in_bytes": 135044600
          },
          "mapped": {
            "count": 2827,
            "used_in_bytes": 2924840579,
            "total_capacity_in_bytes": 2924840579
          }
        },
        "classes": {
          "current_loaded_count": 17649,
          "total_loaded_count": 17806,
          "total_unloaded_count": 157
        }
      },
      "thread_pool": {
        "analyze": {
          "threads": 0,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 0,
          "completed": 0
        },
        "fetch_shard_started": {
          "threads": 0,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 0,
          "completed": 0
        },
        "fetch_shard_store": {
          "threads": 0,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 0,
          "completed": 0
        },
        "flush": {
          "threads": 2,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 2,
          "completed": 10481
        },
        "force_merge": {
          "threads": 0,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 0,
          "completed": 0
        },
        "generic": {
          "threads": 7,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 7,
          "completed": 1252071
        },
        "get": {
          "threads": 4,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 4,
          "completed": 138926
        },
        "index": {
          "threads": 4,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 4,
          "completed": 46253
        },
        "listener": {
          "threads": 2,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 2,
          "completed": 16
        },
        "management": {
          "threads": 5,
          "queue": 0,
          "active": 1,
          "rejected": 0,
          "largest": 5,
          "completed": 802281
        },
        "ml_autodetect": {
          "threads": 0,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 0,
          "completed": 0
        },
        "ml_datafeed": {
          "threads": 0,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 0,
          "completed": 0
        },
        "ml_utility": {
          "threads": 25,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 25,
          "completed": 25
        },
        "refresh": {
          "threads": 2,
          "queue": 0,
          "active": 1,
          "rejected": 0,
          "largest": 2,
          "completed": 16523282
        },
        "rollup_indexing": {
          "threads": 0,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 0,
          "completed": 0
        },
        "search": {
          "threads": 7,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 7,
          "completed": 722194
        },
        "security-token-key": {
          "threads": 0,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 0,
          "completed": 0
        },
        "snapshot": {
          "threads": 0,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 0,
          "completed": 0
        },
        "warmer": {
          "threads": 2,
          "queue": 0,
          "active": 0,
          "rejected": 0,
          "largest": 2,
          "completed": 389633
        },
        "watcher": {
          "threads": 20,
          "queue": 0,
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          "largest": 20,
          "completed": 46242
        },
        "write": {
          "threads": 4,
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          "rejected": 0,
          "largest": 4,
          "completed": 1162801
        }
      },
      "fs": {
        "timestamp": 1534242596059,
        "total": {
          "total_in_bytes": 321965260800,
          "free_in_bytes": 316715397120,
          "available_in_bytes": 316715397120
        },
        "least_usage_estimate": {
          "path": "/data/elasticsearch/data/nodes/0",
          "total_in_bytes": 321965260800,
          "available_in_bytes": 316714684416,
          "used_disk_percent": 1.63078972276503
        },
        "most_usage_estimate": {
          "path": "/data/elasticsearch/data/nodes/0",
          "total_in_bytes": 321965260800,
          "available_in_bytes": 316714684416,
          "used_disk_percent": 1.63078972276503
        },
        "data": [
          {
            "path": "/data/elasticsearch/data/nodes/0",
            "mount": "/data (/dev/vdb)",
            "type": "xfs",
            "total_in_bytes": 321965260800,
            "free_in_bytes": 316715397120,
            "available_in_bytes": 316715397120
          }
        ],
        "io_stats": {
          "devices": [
            {
              "device_name": "vdb",
              "operations": 7009127,
              "read_operations": 43871,
              "write_operations": 6965256,
              "read_kilobytes": 789805,
              "write_kilobytes": 384479626
            }
          ],
          "total": {
            "operations": 7009127,
            "read_operations": 43871,
            "write_operations": 6965256,
            "read_kilobytes": 789805,
            "write_kilobytes": 384479626
          }
        }
      },
      "transport": {
        "server_open": 0,
        "rx_count": 10,
        "rx_size_in_bytes": 5428,
        "tx_count": 10,
        "tx_size_in_bytes": 5428
      },
      "http": {
        "current_open": 23,
        "total_opened": 2739
      },
      "breakers": {
        "request": {
          "limit_size_in_bytes": 3200306380,
          "limit_size": "2.9gb",
          "estimated_size_in_bytes": 0,
          "estimated_size": "0b",
          "overhead": 1,
          "tripped": 0
        },
        "fielddata": {
          "limit_size_in_bytes": 3200306380,
          "limit_size": "2.9gb",
          "estimated_size_in_bytes": 25312,
          "estimated_size": "24.7kb",
          "overhead": 1.03,
          "tripped": 0
        },
        "in_flight_requests": {
          "limit_size_in_bytes": 5333843968,
          "limit_size": "4.9gb",
          "estimated_size_in_bytes": 0,
          "estimated_size": "0b",
          "overhead": 1,
          "tripped": 0
        },
        "accounting": {
          "limit_size_in_bytes": 5333843968,
          "limit_size": "4.9gb",
          "estimated_size_in_bytes": 17486054,
          "estimated_size": "16.6mb",
          "overhead": 1,
          "tripped": 0
        },
        "parent": {
          "limit_size_in_bytes": 3733690777,
          "limit_size": "3.4gb",
          "estimated_size_in_bytes": 17511366,
          "estimated_size": "16.7mb",
          "overhead": 1,
          "tripped": 0
        }
      },
      "script": {
        "compilations": 27,
        "cache_evictions": 0
      },
      "discovery": {
        "cluster_state_queue": {
          "total": 0,
          "pending": 0,
          "committed": 0
        },
        "published_cluster_states": {
          "full_states": 0,
          "incompatible_diffs": 0,
          "compatible_diffs": 0
        }
      },
      "ingest": {
        "total": {
          "count": 0,
          "time_in_millis": 0,
          "current": 0,
          "failed": 0
        },
        "pipelines": {
          "xpack_monitoring_6": {
            "count": 0,
            "time_in_millis": 0,
            "current": 0,
            "failed": 0
          },
          "xpack_monitoring_2": {
            "count": 0,
            "time_in_millis": 0,
            "current": 0,
            "failed": 0
          }
        }
      },
      "adaptive_selection": {
        "lnlHC8yERCKXCuAc_2DPCQ": {
          "outgoing_searches": 0,
          "avg_queue_size": 0,
          "avg_service_time_ns": 61180,
          "avg_response_time_ns": 326251,
          "rank": "0.3"
        }
      }
    }
  }
}