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": "",
         "xpack.installed": "true",
         "ml.max_open_jobs": "",
         "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": "",
             "usage_in_bytes": ""
           }
         }
       },
       "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,
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           "largest": 0,
           "completed": 0
         },
         "ml_utility": {
           "threads": 25,
           "queue": 0,
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           "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,
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         },
         "snapshot": {
           "threads": 0,
           "queue": 0,
           "active": 0,
           "rejected": 0,
           "largest": 0,
           "completed": 0
         },
         "warmer": {
           "threads": 2,
           "queue": 0,
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           "rejected": 0,
           "largest": 2,
           "completed": 389633
         },
         "watcher": {
           "threads": 20,
           "queue": 0,
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           "largest": 20,
           "completed": 46242
         },
         "write": {
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           "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": {
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             "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"
         }
       }
     }
   }
 }