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Index stats API

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Index stats API

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Returns statistics for an index.

GET /my-index-000001/_stats

Request

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GET /<index>/_stats/<index-metric>

GET /<index>/_stats

GET /_stats

Description

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Use the index stats API to get high-level aggregation and statistics for an index.

By default, the returned statistics are index-level with primaries and total aggregations. primaries are the values for only the primary shards. total are the accumulated values for both primary and replica shards.

To get shard-level statistics, set the level parameter to shards.

When moving to another node, the shard-level statistics for a shard are cleared. Although the shard is no longer part of the node, that node retains any node-level statistics to which the shard contributed.

Path parameters

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<index>

(Optional, string) Comma-separated list or wildcard expression of index names used to limit the request.

To retrieve statistics for all indices, use a value of _all or * or omit this parameter.

<index-metric>

(Optional, string) Comma-separated list of metrics used to limit the request. Supported metrics are:

_all

Return all statistics.

completion

Completion suggester statistics.

docs

Number of documents and deleted docs, which have not yet merged out. Index refreshes can affect this statistic.

fielddata

Fielddata 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 statistics. You can include statistics for custom groups by adding an extra groups parameter (search operations can be associated with one or more groups). The groups parameter accepts a comma separated list of group names. Use _all to return statistics for all groups.

segments

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.

suggest

Suggester statistics.

translog

Translog statistics.

warmer

Warmer statistics.

Query parameters

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expand_wildcards

(Optional, string) Controls what kind of indices that wildcard expressions can expand to. Multiple values are accepted when separated by a comma, as in open,hidden. Valid values are:

all: Expand to open and closed indices, including hidden indices.
open: Expand only to open indices.
closed: Expand only to closed indices.
hidden: Expansion of wildcards will include hidden indices. Must be combined with open, closed, or both.
none: Wildcard expressions are not accepted.

Defaults to open.

fields

(Optional, string) Comma-separated list or wildcard expressions of fields to include in the statistics.

Used as the default list unless a specific field list is provided in the completion_fields or fielddata_fields parameters.

completion_fields

(Optional, string) Comma-separated list or wildcard expressions of fields to include in fielddata and suggest statistics.

fielddata_fields

(Optional, string) Comma-separated list or wildcard expressions of fields to include in fielddata statistics.

forbid_closed_indices

(Optional, boolean) If true, statistics are not collected from closed indices. Defaults to true.

groups

(Optional, string) Comma-separated list of search groups to include in the search statistics.

level

(Optional, string) Indicates whether statistics are aggregated at the cluster, index, or shard level.

Valid values are:

cluster
indices
shards

include_segment_file_sizes

(Optional, boolean) If true, the call reports the aggregated disk usage of each one of the Lucene index files (only applies if segment stats are requested). Defaults to false.

include_unloaded_segments