Index Stats

Introduced 1.0

The Index Stats API provides index statistics. For data streams, the API provides statistics for the stream’s backing indexes. By default, the returned statistics are index level. To receive shard-level statistics, set the level parameter to shards.

When a shard moves to a different node, the shard-level statistics for the shard are cleared. Although the shard is no longer part of the node, the node preserves any node-level statistics to which the shard contributed.

Path and HTTP methods

GET /_stats
GET /<index_ids>/_stats
GET /<index_ids>/_stats/<metric>

Path parameters

The following table lists the available path parameters. All path parameters are optional.

Parameter	Data type	Description
`<index_ids>`	String	A comma-separated list of indexes, data streams, or index aliases used to filter results. Supports wildcard expressions. Defaults to `_all` (`*`).
`<metric>`	String	A comma-separated list of metric groups that will be included in the response. For valid values, see Metrics. Defaults to all metrics.

Metrics

The following table lists all available metric groups.

Metric	Description
`_all`	Return all statistics.
`completion`	Completion suggester statistics.
`docs`	Returns the number of documents and the number of deleted documents that have not yet been merged. Index refresh operations can affect this statistic.
`fielddata`	Field data statistics.
`flush`	Flush statistics.
`get`	Get statistics, including missing stats.
`indexing`	Indexing statistics.
`merge`	Merge statistics.
`query_cache`	Query cache statistics.
`refresh`	Refresh statistics.
`request_cache`	Shard request cache statistics.
`search`	Search statistics, including suggest operation statistics. Search operations can be associated with one or more groups. You can include statistics for custom groups by providing a `groups` parameter, which accepts a comma-separated list of group names. To return statistics for all groups, use `_all`.
`segments`	Statistics about memory use of all open segments. If the `include_segment_file_sizes` parameter is `true`, this metric includes the aggregated disk usage of each Lucene index file.
`store`	Size of the index in byte units.
`translog`	Translog statistics.
`warmer`	Warmer statistics.

Query parameters

The following table lists the available query parameters. All query parameters are optional.

Parameter	Data type	Description
`expand_wildcards`	String	Specifies the type of indexes to which wildcard expressions can expand. Supports comma-separated values. Valid values are: - `all`: Expand to all open and closed indexes, including hidden indexes. - `open`: Expand to open indexes. - `closed`: Expand to closed indexes. - `hidden`: Include hidden indexes when expanding. Must be combined with `open`, `closed`, or both. - `none`: Do not accept wildcard expressions. Default is `open`.
`fields`	String	A comma-separated list or a wildcard expression specifying fields to include in the statistics. Specifies the default field list if neither `completion_fields` nor `fielddata_fields` is provided.
`completion_fields`	String	A comma-separated list or wildcard expression specifying fields to include in field-level `completion` statistics.
`fielddata_fields`	String	A comma-separated list or wildcard expression specifying fields to include in field-level `fielddata` statistics.
`forbid_closed_indices`	Boolean	Specifies not to collect statistics for closed indexes. Default is `true`.
`groups`	String	A comma-separated list of search groups to include in the `search` statistics.
`level`	String	Specifies the level used to aggregate statistics. Valid values are: - `cluster`: Cluster-level statistics. - `indices`: Index-level statistics. - `shards`: Shard-level statistics. Default is `indices`.
`include_segment_file_sizes`	Boolean	Specifies whether to report the aggregated disk usage of each Lucene index file. Only applies to `segments` statistics. Default is `false`.
`include_unloaded_segments`	Boolean	Specifies whether to include information from segments that are not loaded into memory. Default is `false`.

Example request: One index

GET /testindex/_stats

copy

Example request: Comma-separated list of indexes

GET /testindex1,testindex2/_stats

copy

Example request: Wildcard expression

GET /testindex*/_stats

copy

Example request: Specific stats

GET /testindex/_stats/refresh,flush

copy

Example request: Expand wildcards

GET /testindex*/_stats?expand_wildcards=open,hidden

copy

Example request: Shard-level statistics

GET /testindex/_stats?level=shards

copy

Example response

By default, the returned statistics are aggregated in the primaries and total aggregations. The primaries aggregation contains statistics for the primary shards. The total aggregation contains statistics for both primary and replica shards. The following is an example Index Stats API response:

Response

{
  "_shards": {
    "total": 2,
    "successful": 1,
    "failed": 0
  },
  "_all": {
    "primaries": {
      "docs": {
        "count": 4,
        "deleted": 0
      },
      "store": {
        "size_in_bytes": 15531,
        "reserved_in_bytes": 0
      },
      "indexing": {
        "index_total": 4,
        "index_time_in_millis": 10,
        "index_current": 0,
        "index_failed": 0,
        "delete_total": 0,
        "delete_time_in_millis": 0,
        "delete_current": 0,
        "noop_update_total": 0,
        "is_throttled": false,
        "throttle_time_in_millis": 0
      },
      "get": {
        "total": 0,
        "time_in_millis": 0,
        "exists_total": 0,
        "exists_time_in_millis": 0,
        "missing_total": 0,
        "missing_time_in_millis": 0,
        "current": 0
      },
      "search": {
        "open_contexts": 0,
        "query_total": 12,
        "query_time_in_millis": 11,
        "query_current": 0,
        "fetch_total": 12,
        "fetch_time_in_millis": 5,
        "fetch_current": 0,
        "scroll_total": 0,
        "scroll_time_in_millis": 0,
        "scroll_current": 0,
        "point_in_time_total": 0,
        "point_in_time_time_in_millis": 0,
        "point_in_time_current": 0,
        "suggest_total": 0,
        "suggest_time_in_millis": 0,
        "suggest_current": 0
      },
      "merges": {
        "current": 0,
        "current_docs": 0,
        "current_size_in_bytes": 0,
        "total": 0,
        "total_time_in_millis": 0,
        "total_docs": 0,
        "total_size_in_bytes": 0,
        "total_stopped_time_in_millis": 0,
        "total_throttled_time_in_millis": 0,
        "total_auto_throttle_in_bytes": 20971520
      },
      "refresh": {
        "total": 8,
        "total_time_in_millis": 58,
        "external_total": 7,
        "external_total_time_in_millis": 60,
        "listeners": 0
      },
      "flush": {
        "total": 1,
        "periodic": 1,
        "total_time_in_millis": 21
      },
      "warmer": {
        "current": 0,
        "total": 6,
        "total_time_in_millis": 0
      },
      "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": {
        "memory_size_in_bytes": 0,
        "evictions": 0
      },
      "completion": {
        "size_in_bytes": 0
      },
      "segments": {
        "count": 4,
        "memory_in_bytes": 0,
        "terms_memory_in_bytes": 0,
        "stored_fields_memory_in_bytes": 0,
        "term_vectors_memory_in_bytes": 0,
        "norms_memory_in_bytes": 0,
        "points_memory_in_bytes": 0,
        "doc_values_memory_in_bytes": 0,
        "index_writer_memory_in_bytes": 0,
        "version_map_memory_in_bytes": 0,
        "fixed_bit_set_memory_in_bytes": 0,
        "max_unsafe_auto_id_timestamp": -1,
        "remote_store" : {
          "upload" : {
            "total_upload_size" : {
              "started_bytes" : 152419,
              "succeeded_bytes" : 152419,
              "failed_bytes" : 0
            },
            "refresh_size_lag" : {
              "total_bytes" : 0,
              "max_bytes" : 0
            },
            "max_refresh_time_lag_in_millis" : 0,
            "total_time_spent_in_millis" : 516,
            "pressure" : {
              "total_rejections" : 0
            }
          },
          "download" : {
            "total_download_size" : {
              "started_bytes" : 0,
              "succeeded_bytes" : 0,
              "failed_bytes" : 0
            },
            "total_time_spent_in_millis" : 0
          }
        },
        "file_sizes": {}
      },
      "translog": {
        "operations": 0,
        "size_in_bytes": 55,
        "uncommitted_operations": 0,
        "uncommitted_size_in_bytes": 55,
        "earliest_last_modified_age": 142622215,
        "remote_store" : {
          "upload" : {
            "total_uploads" : {
              "started" : 57,
              "failed" : 0,
              "succeeded" : 57
            },
            "total_upload_size" : {
              "started_bytes" : 16830,
              "failed_bytes" : 0,
              "succeeded_bytes" : 16830
            }
          }
        }
      },
      "request_cache": {
        "memory_size_in_bytes": 0,
        "evictions": 0,
        "hit_count": 0,
        "miss_count": 0
      },
      "recovery": {
        "current_as_source": 0,
        "current_as_target": 0,
        "throttle_time_in_millis": 0
      }
    },
    "total": {
      "docs": {
        "count": 4,
        "deleted": 0
      },
      "store": {
        "size_in_bytes": 15531,
        "reserved_in_bytes": 0
      },
      "indexing": {
        "index_total": 4,
        "index_time_in_millis": 10,
        "index_current": 0,
        "index_failed": 0,
        "delete_total": 0,
        "delete_time_in_millis": 0,
        "delete_current": 0,
        "noop_update_total": 0,
        "is_throttled": false,
        "throttle_time_in_millis": 0
      },
      "get": {
        "total": 0,
        "time_in_millis": 0,
        "exists_total": 0,
        "exists_time_in_millis": 0,
        "missing_total": 0,
        "missing_time_in_millis": 0,
        "current": 0
      },
      "search": {
        "open_contexts": 0,
        "query_total": 12,
        "query_time_in_millis": 11,
        "query_current": 0,
        "fetch_total": 12,
        "fetch_time_in_millis": 5,
        "fetch_current": 0,
        "scroll_total": 0,
        "scroll_time_in_millis": 0,
        "scroll_current": 0,
        "point_in_time_total": 0,
        "point_in_time_time_in_millis": 0,
        "point_in_time_current": 0,
        "suggest_total": 0,
        "suggest_time_in_millis": 0,
        "suggest_current": 0
      },
      "merges": {
        "current": 0,
        "current_docs": 0,
        "current_size_in_bytes": 0,
        "total": 0,
        "total_time_in_millis": 0,
        "total_docs": 0,
        "total_size_in_bytes": 0,
        "total_stopped_time_in_millis": 0,
        "total_throttled_time_in_millis": 0,
        "total_auto_throttle_in_bytes": 20971520
      },
      "refresh": {
        "total": 8,
        "total_time_in_millis": 58,
        "external_total": 7,
        "external_total_time_in_millis": 60,
        "listeners": 0
      },
      "flush": {
        "total": 1,
        "periodic": 1,
        "total_time_in_millis": 21
      },
      "warmer": {
        "current": 0,
        "total": 6,
        "total_time_in_millis": 0
      },
      "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": {
        "memory_size_in_bytes": 0,
        "evictions": 0
      },
      "completion": {
        "size_in_bytes": 0
      },
      "segments": {
        "count": 4,
        "memory_in_bytes": 0,
        "terms_memory_in_bytes": 0,
        "stored_fields_memory_in_bytes": 0,
        "term_vectors_memory_in_bytes": 0,
        "norms_memory_in_bytes": 0,
        "points_memory_in_bytes": 0,
        "doc_values_memory_in_bytes": 0,
        "index_writer_memory_in_bytes": 0,
        "version_map_memory_in_bytes": 0,
        "fixed_bit_set_memory_in_bytes": 0,
        "max_unsafe_auto_id_timestamp": -1,
        "remote_store" : {
          "upload" : {
            "total_upload_size" : {
              "started_bytes" : 152419,
              "succeeded_bytes" : 152419,
              "failed_bytes" : 0
            },
            "refresh_size_lag" : {
              "total_bytes" : 0,
              "max_bytes" : 0
            },
            "max_refresh_time_lag_in_millis" : 0,
            "total_time_spent_in_millis" : 516,
            "pressure" : {
              "total_rejections" : 0
            }
          },
          "download" : {
            "total_download_size" : {
              "started_bytes" : 0,
              "succeeded_bytes" : 0,
              "failed_bytes" : 0
            },
            "total_time_spent_in_millis" : 0
          }
        },
        "file_sizes": {}
      },
      "translog": {
        "operations": 0,
        "size_in_bytes": 55,
        "uncommitted_operations": 0,
        "uncommitted_size_in_bytes": 55,
        "earliest_last_modified_age": 142622215,
        "remote_store" : {
          "upload" : {
            "total_uploads" : {
              "started" : 57,
              "failed" : 0,
              "succeeded" : 57
            },
            "total_upload_size" : {
              "started_bytes" : 16830,
              "failed_bytes" : 0,
              "succeeded_bytes" : 16830
            }
          }
        }
      },
      "request_cache": {
        "memory_size_in_bytes": 0,
        "evictions": 0,
        "hit_count": 0,
        "miss_count": 0
      },
      "recovery": {
        "current_as_source": 0,
        "current_as_target": 0,
        "throttle_time_in_millis": 0
      }
    }
  },
  "indices": {
    "testindex": {
      "uuid": "0SXXSpe9Rp-FpxXXWLOD8Q",
      "primaries": {
        "docs": {
          "count": 4,
          "deleted": 0
        },
        "store": {
          "size_in_bytes": 15531,
          "reserved_in_bytes": 0
        },
        "indexing": {
          "index_total": 4,
          "index_time_in_millis": 10,
          "index_current": 0,
          "index_failed": 0,
          "delete_total": 0,
          "delete_time_in_millis": 0,
          "delete_current": 0,
          "noop_update_total": 0,
          "is_throttled": false,
          "throttle_time_in_millis": 0
        },
        "get": {
          "total": 0,
          "time_in_millis": 0,
          "exists_total": 0,
          "exists_time_in_millis": 0,
          "missing_total": 0,
          "missing_time_in_millis": 0,
          "current": 0
        },
        "search": {
          "open_contexts": 0,
          "query_total": 12,
          "query_time_in_millis": 11,
          "query_current": 0,
          "fetch_total": 12,
          "fetch_time_in_millis": 5,
          "fetch_current": 0,
          "scroll_total": 0,
          "scroll_time_in_millis": 0,
          "scroll_current": 0,
          "point_in_time_total": 0,
          "point_in_time_time_in_millis": 0,
          "point_in_time_current": 0,
          "suggest_total": 0,
          "suggest_time_in_millis": 0,
          "suggest_current": 0
        },
        "merges": {
          "current": 0,
          "current_docs": 0,
          "current_size_in_bytes": 0,
          "total": 0,
          "total_time_in_millis": 0,
          "total_docs": 0,
          "total_size_in_bytes": 0,
          "total_stopped_time_in_millis": 0,
          "total_throttled_time_in_millis": 0,
          "total_auto_throttle_in_bytes": 20971520
        },
        "refresh": {
          "total": 8,
          "total_time_in_millis": 58,
          "external_total": 7,
          "external_total_time_in_millis": 60,
          "listeners": 0
        },
        "flush": {
          "total": 1,
          "periodic": 1,
          "total_time_in_millis": 21
        },
        "warmer": {
          "current": 0,
          "total": 6,
          "total_time_in_millis": 0
        },
        "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": {
          "memory_size_in_bytes": 0,
          "evictions": 0
        },
        "completion": {
          "size_in_bytes": 0
        },
        "segments": {
          "count": 4,
          "memory_in_bytes": 0,
          "terms_memory_in_bytes": 0,
          "stored_fields_memory_in_bytes": 0,
          "term_vectors_memory_in_bytes": 0,
          "norms_memory_in_bytes": 0,
          "points_memory_in_bytes": 0,
          "doc_values_memory_in_bytes": 0,
          "index_writer_memory_in_bytes": 0,
          "version_map_memory_in_bytes": 0,
          "fixed_bit_set_memory_in_bytes": 0,
          "max_unsafe_auto_id_timestamp": -1,
          "remote_store" : {
            "upload" : {
              "total_upload_size" : {
                "started_bytes" : 152419,
                "succeeded_bytes" : 152419,
                "failed_bytes" : 0
              },
              "refresh_size_lag" : {
                "total_bytes" : 0,
                "max_bytes" : 0
              },
              "max_refresh_time_lag_in_millis" : 0,
              "total_time_spent_in_millis" : 516,
              "pressure" : {
                "total_rejections" : 0
              }
            },
            "download" : {
              "total_download_size" : {
                "started_bytes" : 0,
                "succeeded_bytes" : 0,
                "failed_bytes" : 0
              },
              "total_time_spent_in_millis" : 0
            }
          },
          "file_sizes": {}
        },
        "translog": {
          "operations": 0,
          "size_in_bytes": 55,
          "uncommitted_operations": 0,
          "uncommitted_size_in_bytes": 55,
          "earliest_last_modified_age": 142622215,
          "remote_store" : {
            "upload" : {
              "total_uploads" : {
                "started" : 57,
                "failed" : 0,
                "succeeded" : 57
              },
              "total_upload_size" : {
                "started_bytes" : 16830,
                "failed_bytes" : 0,
                "succeeded_bytes" : 16830
              }
            }
          }
        },
        "request_cache": {
          "memory_size_in_bytes": 0,
          "evictions": 0,
          "hit_count": 0,
          "miss_count": 0
        },
        "recovery": {
          "current_as_source": 0,
          "current_as_target": 0,
          "throttle_time_in_millis": 0
        }
      },
      "total": {
        "docs": {
          "count": 4,
          "deleted": 0
        },
        "store": {
          "size_in_bytes": 15531,
          "reserved_in_bytes": 0
        },
        "indexing": {
          "index_total": 4,
          "index_time_in_millis": 10,
          "index_current": 0,
          "index_failed": 0,
          "delete_total": 0,
          "delete_time_in_millis": 0,
          "delete_current": 0,
          "noop_update_total": 0,
          "is_throttled": false,
          "throttle_time_in_millis": 0
        },
        "get": {
          "total": 0,
          "time_in_millis": 0,
          "exists_total": 0,
          "exists_time_in_millis": 0,
          "missing_total": 0,
          "missing_time_in_millis": 0,
          "current": 0
        },
        "search": {
          "open_contexts": 0,
          "query_total": 12,
          "query_time_in_millis": 11,
          "query_current": 0,
          "fetch_total": 12,
          "fetch_time_in_millis": 5,
          "fetch_current": 0,
          "scroll_total": 0,
          "scroll_time_in_millis": 0,
          "scroll_current": 0,
          "point_in_time_total": 0,
          "point_in_time_time_in_millis": 0,
          "point_in_time_current": 0,
          "suggest_total": 0,
          "suggest_time_in_millis": 0,
          "suggest_current": 0
        },
        "merges": {
          "current": 0,
          "current_docs": 0,
          "current_size_in_bytes": 0,
          "total": 0,
          "total_time_in_millis": 0,
          "total_docs": 0,
          "total_size_in_bytes": 0,
          "total_stopped_time_in_millis": 0,
          "total_throttled_time_in_millis": 0,
          "total_auto_throttle_in_bytes": 20971520
        },
        "refresh": {
          "total": 8,
          "total_time_in_millis": 58,
          "external_total": 7,
          "external_total_time_in_millis": 60,
          "listeners": 0
        },
        "flush": {
          "total": 1,
          "periodic": 1,
          "total_time_in_millis": 21
        },
        "warmer": {
          "current": 0,
          "total": 6,
          "total_time_in_millis": 0
        },
        "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": {
          "memory_size_in_bytes": 0,
          "evictions": 0
        },
        "completion": {
          "size_in_bytes": 0
        },
        "segments": {
          "count": 4,
          "memory_in_bytes": 0,
          "terms_memory_in_bytes": 0,
          "stored_fields_memory_in_bytes": 0,
          "term_vectors_memory_in_bytes": 0,
          "norms_memory_in_bytes": 0,
          "points_memory_in_bytes": 0,
          "doc_values_memory_in_bytes": 0,
          "index_writer_memory_in_bytes": 0,
          "version_map_memory_in_bytes": 0,
          "fixed_bit_set_memory_in_bytes": 0,
          "max_unsafe_auto_id_timestamp": -1,
          "remote_store" : {
            "upload" : {
              "total_upload_size" : {
                "started_bytes" : 152419,
                "succeeded_bytes" : 152419,
                "failed_bytes" : 0
              },
              "refresh_size_lag" : {
                "total_bytes" : 0,
                "max_bytes" : 0
              },
              "max_refresh_time_lag_in_millis" : 0,
              "total_time_spent_in_millis" : 516,
              "pressure" : {
                "total_rejections" : 0
              }
            },
            "download" : {
              "total_download_size" : {
                "started_bytes" : 0,
                "succeeded_bytes" : 0,
                "failed_bytes" : 0
              },
              "total_time_spent_in_millis" : 0
            }
          },
          "file_sizes": {}
        },
        "translog": {
          "operations": 0,
          "size_in_bytes": 55,
          "uncommitted_operations": 0,
          "uncommitted_size_in_bytes": 55,
          "earliest_last_modified_age": 142622215,
          "remote_store" : {
            "upload" : {
              "total_uploads" : {
                "started" : 57,
                "failed" : 0,
                "succeeded" : 57
              },
              "total_upload_size" : {
                "started_bytes" : 16830,
                "failed_bytes" : 0,
                "succeeded_bytes" : 16830
              }
            }
          }
        },
        "request_cache": {
          "memory_size_in_bytes": 0,
          "evictions": 0,
          "hit_count": 0,
          "miss_count": 0
        },
        "recovery": {
          "current_as_source": 0,
          "current_as_target": 0,
          "throttle_time_in_millis": 0
        }
      }
    }
  }
}

Response fields

For information about response fields, see Nodes Stats API response fields.