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---
layout: default
title: Stats
parent: Index APIs
nav_order: 72
---
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# Index Stats
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**Introduced 1.0**
{: .label .label-purple }
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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.
{: .note}
## Path and HTTP methods
```json
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 ](#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: < br > - `all` : Expand to all open and closed indexes, including hidden indexes. < br > - `open` : Expand to open indexes. < br > - `closed` : Expand to closed indexes. < br > - `hidden` : Include hidden indexes when expanding. Must be combined with `open` , `closed` , or both. < br > - `none` : Do not accept wildcard expressions. < br > 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: < br > - `cluster` : Cluster-level statistics. < br > - `indices` : Index-level statistics. < br > - `shards` : Shard-level statistics. < br > 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
```json
GET /testindex/_stats
```
{% include copy-curl.html %}
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#### Example request: Comma-separated list of indexes
```json
GET /testindex1,testindex2/_stats
```
{% include copy-curl.html %}
#### Example request: Wildcard expression
```json
GET /testindex*/_stats
```
{% include copy-curl.html %}
#### Example request: Specific stats
```json
GET /testindex/_stats/refresh,flush
```
{% include copy-curl.html %}
#### Example request: Expand wildcards
```json
GET /testindex*/_stats?expand_wildcards=open,hidden
```
{% include copy-curl.html %}
#### Example request: Shard-level statistics
```json
GET /testindex/_stats?level=shards
```
{% include copy-curl.html %}
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#### 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:
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< details markdown = "block" >
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< summary >
Response
< / summary >
{: .text-delta}
```json
{
"_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,
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"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,
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"total_time_spent_in_millis" : 516,
"pressure" : {
"total_rejections" : 0
}
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},
"download" : {
"total_download_size" : {
"started_bytes" : 0,
"succeeded_bytes" : 0,
"failed_bytes" : 0
},
"total_time_spent_in_millis" : 0
}
},
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"file_sizes": {}
},
"translog": {
"operations": 0,
"size_in_bytes": 55,
"uncommitted_operations": 0,
"uncommitted_size_in_bytes": 55,
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"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
}
}
}
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},
"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,
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"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,
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"total_time_spent_in_millis" : 516,
"pressure" : {
"total_rejections" : 0
}
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},
"download" : {
"total_download_size" : {
"started_bytes" : 0,
"succeeded_bytes" : 0,
"failed_bytes" : 0
},
"total_time_spent_in_millis" : 0
}
},
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"file_sizes": {}
},
"translog": {
"operations": 0,
"size_in_bytes": 55,
"uncommitted_operations": 0,
"uncommitted_size_in_bytes": 55,
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"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
}
}
}
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},
"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,
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"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,
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"total_time_spent_in_millis" : 516,
"pressure" : {
"total_rejections" : 0
}
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},
"download" : {
"total_download_size" : {
"started_bytes" : 0,
"succeeded_bytes" : 0,
"failed_bytes" : 0
},
"total_time_spent_in_millis" : 0
}
},
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"file_sizes": {}
},
"translog": {
"operations": 0,
"size_in_bytes": 55,
"uncommitted_operations": 0,
"uncommitted_size_in_bytes": 55,
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"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
}
}
}
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},
"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,
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"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,
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"total_time_spent_in_millis" : 516,
"pressure" : {
"total_rejections" : 0
}
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},
"download" : {
"total_download_size" : {
"started_bytes" : 0,
"succeeded_bytes" : 0,
"failed_bytes" : 0
},
"total_time_spent_in_millis" : 0
}
},
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"file_sizes": {}
},
"translog": {
"operations": 0,
"size_in_bytes": 55,
"uncommitted_operations": 0,
"uncommitted_size_in_bytes": 55,
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"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
}
}
}
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},
"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
}
}
}
}
}
```
< / details >
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## Response fields
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For information about response fields, see [Nodes Stats API response fields ]({{site.url}}{{site.baseurl}}/api-reference/nodes-apis/nodes-stats/#indices ).
