Index stats APIedit
Returns statistics for an index.
GET /twitter/_stats
Descriptionedit
Use the index stats API to get highlevel aggregation and statistics for an index.
By default,
the returned statistics are indexlevel
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 shardlevel statistics,
set the level
parameter to shards
.
When moving to another node, the shardlevel statistics for a shard are cleared. Although the shard is no longer part of the node, that node retains any nodelevel statistics to which the shard contributed.
Path parametersedit

<index>

(Optional, string) Commaseparated 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. 
<indexmetric>

(Optional, string) Commaseparated 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). Thegroups
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 istrue
, 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 parametersedit

expand_wildcards

(Optional, string) Controls what kind of indices that wildcard expressions can expand to. Valid values are:

all
 Expand to open and closed indices.

open
 Expand only to open indices.

closed
 Expand only to closed indices.

none
 Wildcard expressions are not accepted.
Defaults to
open
. 

fields

(Optional, string) Commaseparated 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
orfielddata_fields
parameters. 
completion_fields

(Optional, string)
Commaseparated list or wildcard expressions of fields
to include in
fielddata
andsuggest
statistics. 
fielddata_fields

(Optional, string)
Commaseparated 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 totrue
. 
groups

(Optional, string)
Commaseparated 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 tofalse
. 
include_unloaded_segments

(Optional, boolean) If
true
, the response includes information from segments that are not loaded into memory. Defaults tofalse
.
Examplesedit
Get statistics for multiple indicesedit
GET /index1,index2/_stats
Get statistics for all indicesedit
GET /_stats
Get specific statisticsedit
The following request returns
only the merge
and refresh
statistics
for all indices.
GET /_stats/merge,refresh
Get statistics for specific search groupsedit
The following request returns
only search statistics
for the group1
and group2
search groups.
GET /_stats/search?groups=group1,group2