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

  1. GET /_stats
  2. GET /_stats/<metric>
  3. GET /<index_ids>/_stats
  4. GET /<index_ids>/_stats/<metric>

Path parameters

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

ParameterData typeDescription
<index_ids>StringA comma-separated list of indexes, data streams, or index aliases used to filter results. Supports wildcard expressions. Defaults to _all (*).
<metric>StringA 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.

MetricDescription
_allReturn all statistics.
completionCompletion suggester statistics.
docsReturns the number of documents and the number of deleted documents that have not yet been merged. Index refresh operations can affect this statistic.
fielddataField data statistics.
flushFlush statistics.
getGet statistics, including missing stats.
indexingIndexing statistics.
mergeMerge statistics.
query_cacheQuery cache statistics.
refreshRefresh statistics.
request_cacheShard request cache statistics.
searchSearch 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.
segmentsStatistics 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.
storeSize of the index in byte units.
translogTranslog statistics.
warmerWarmer statistics.

Query parameters

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

ParameterData typeDescription
expand_wildcardsStringSpecifies 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.
fieldsStringA 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_fieldsStringA comma-separated list or wildcard expression specifying fields to include in field-level completion statistics.
fielddata_fieldsStringA comma-separated list or wildcard expression specifying fields to include in field-level fielddata statistics.
forbid_closed_indicesBooleanSpecifies not to collect statistics for closed indexes. Default is true.
groupsStringA comma-separated list of search groups to include in the search statistics.
levelStringSpecifies 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_sizesBooleanSpecifies whether to report the aggregated disk usage of each Lucene index file. Only applies to segments statistics. Default is false.
include_unloaded_segmentsBooleanSpecifies whether to include information from segments that are not loaded into memory. Default is false.

Example requests

The following example requests show how to use the Index Stats API.

One index

The following example returns index stats for a single index:

  1. GET /testindex/_stats

copy

Comma-separated list of indexes

The following example returns stats for multiple indexes:

  1. GET /testindex1,testindex2/_stats

copy

Wildcard expression

The following example returns starts about any index that starts with testindex:

  1. GET /testindex*/_stats

copy

Specific stats

The following example returns index stats related to the index and flush operations:

  1. GET /testindex/_stats/refresh,flush

copy

Expand wildcards

The following example expands all wildcards related to index stats:

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

copy

Shard-level statistics

The following example returns shard level stats about a test index:

  1. 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

  1. {
  2.   "_shards": {
  3.     "total": 2,
  4.     "successful": 1,
  5.     "failed": 0
  6.   },
  7.   "_all": {
  8.     "primaries": {
  9.       "docs": {
  10.         "count": 4,
  11.         "deleted": 0
  12.       },
  13.       "store": {
  14.         "size_in_bytes": 15531,
  15.         "reserved_in_bytes": 0
  16.       },
  17.       "indexing": {
  18.         "index_total": 4,
  19.         "index_time_in_millis": 10,
  20.         "index_current": 0,
  21.         "index_failed": 0,
  22.         "delete_total": 0,
  23.         "delete_time_in_millis": 0,
  24.         "delete_current": 0,
  25.         "noop_update_total": 0,
  26.         "is_throttled": false,
  27.         "throttle_time_in_millis": 0
  28.       },
  29.       "get": {
  30.         "total": 0,
  31.         "time_in_millis": 0,
  32.         "exists_total": 0,
  33.         "exists_time_in_millis": 0,
  34.         "missing_total": 0,
  35.         "missing_time_in_millis": 0,
  36.         "current": 0
  37.       },
  38.       "search": {
  39.         "open_contexts": 0,
  40.         "query_total": 12,
  41.         "query_time_in_millis": 11,
  42.         "query_current": 0,
  43.         "fetch_total": 12,
  44.         "fetch_time_in_millis": 5,
  45.         "fetch_current": 0,
  46.         "scroll_total": 0,
  47.         "scroll_time_in_millis": 0,
  48.         "scroll_current": 0,
  49.         "point_in_time_total": 0,
  50.         "point_in_time_time_in_millis": 0,
  51.         "point_in_time_current": 0,
  52.         "suggest_total": 0,
  53.         "suggest_time_in_millis": 0,
  54.         "suggest_current": 0
  55.       },
  56.       "merges": {
  57.         "current": 0,
  58.         "current_docs": 0,
  59.         "current_size_in_bytes": 0,
  60.         "total": 0,
  61.         "total_time_in_millis": 0,
  62.         "total_docs": 0,
  63.         "total_size_in_bytes": 0,
  64.         "total_stopped_time_in_millis": 0,
  65.         "total_throttled_time_in_millis": 0,
  66.         "total_auto_throttle_in_bytes": 20971520
  67.       },
  68.       "refresh": {
  69.         "total": 8,
  70.         "total_time_in_millis": 58,
  71.         "external_total": 7,
  72.         "external_total_time_in_millis": 60,
  73.         "listeners": 0
  74.       },
  75.       "flush": {
  76.         "total": 1,
  77.         "periodic": 1,
  78.         "total_time_in_millis": 21
  79.       },
  80.       "warmer": {
  81.         "current": 0,
  82.         "total": 6,
  83.         "total_time_in_millis": 0
  84.       },
  85.       "query_cache": {
  86.         "memory_size_in_bytes": 0,
  87.         "total_count": 0,
  88.         "hit_count": 0,
  89.         "miss_count": 0,
  90.         "cache_size": 0,
  91.         "cache_count": 0,
  92.         "evictions": 0
  93.       },
  94.       "fielddata": {
  95.         "memory_size_in_bytes": 0,
  96.         "evictions": 0
  97.       },
  98.       "completion": {
  99.         "size_in_bytes": 0
  100.       },
  101.       "segments": {
  102.         "count": 4,
  103.         "memory_in_bytes": 0,
  104.         "terms_memory_in_bytes": 0,
  105.         "stored_fields_memory_in_bytes": 0,
  106.         "term_vectors_memory_in_bytes": 0,
  107.         "norms_memory_in_bytes": 0,
  108.         "points_memory_in_bytes": 0,
  109.         "doc_values_memory_in_bytes": 0,
  110.         "index_writer_memory_in_bytes": 0,
  111.         "version_map_memory_in_bytes": 0,
  112.         "fixed_bit_set_memory_in_bytes": 0,
  113.         "max_unsafe_auto_id_timestamp": -1,
  114.         "remote_store" : {
  115.           "upload" : {
  116.             "total_upload_size" : {
  117.               "started_bytes" : 152419,
  118.               "succeeded_bytes" : 152419,
  119.               "failed_bytes" : 0
  120.             },
  121.             "refresh_size_lag" : {
  122.               "total_bytes" : 0,
  123.               "max_bytes" : 0
  124.             },
  125.             "max_refresh_time_lag_in_millis" : 0,
  126.             "total_time_spent_in_millis" : 516,
  127.             "pressure" : {
  128.               "total_rejections" : 0
  129.             }
  130.           },
  131.           "download" : {
  132.             "total_download_size" : {
  133.               "started_bytes" : 0,
  134.               "succeeded_bytes" : 0,
  135.               "failed_bytes" : 0
  136.             },
  137.             "total_time_spent_in_millis" : 0
  138.           }
  139.         },
  140.         "file_sizes": {}
  141.       },
  142.       "translog": {
  143.         "operations": 0,
  144.         "size_in_bytes": 55,
  145.         "uncommitted_operations": 0,
  146.         "uncommitted_size_in_bytes": 55,
  147.         "earliest_last_modified_age": 142622215,
  148.         "remote_store" : {
  149.           "upload" : {
  150.             "total_uploads" : {
  151.               "started" : 57,
  152.               "failed" : 0,
  153.               "succeeded" : 57
  154.             },
  155.             "total_upload_size" : {
  156.               "started_bytes" : 16830,
  157.               "failed_bytes" : 0,
  158.               "succeeded_bytes" : 16830
  159.             }
  160.           }
  161.         }
  162.       },
  163.       "request_cache": {
  164.         "memory_size_in_bytes": 0,
  165.         "evictions": 0,
  166.         "hit_count": 0,
  167.         "miss_count": 0
  168.       },
  169.       "recovery": {
  170.         "current_as_source": 0,
  171.         "current_as_target": 0,
  172.         "throttle_time_in_millis": 0
  173.       }
  174.     },
  175.     "total": {
  176.       "docs": {
  177.         "count": 4,
  178.         "deleted": 0
  179.       },
  180.       "store": {
  181.         "size_in_bytes": 15531,
  182.         "reserved_in_bytes": 0
  183.       },
  184.       "indexing": {
  185.         "index_total": 4,
  186.         "index_time_in_millis": 10,
  187.         "index_current": 0,
  188.         "index_failed": 0,
  189.         "delete_total": 0,
  190.         "delete_time_in_millis": 0,
  191.         "delete_current": 0,
  192.         "noop_update_total": 0,
  193.         "is_throttled": false,
  194.         "throttle_time_in_millis": 0
  195.       },
  196.       "get": {
  197.         "total": 0,
  198.         "time_in_millis": 0,
  199.         "exists_total": 0,
  200.         "exists_time_in_millis": 0,
  201.         "missing_total": 0,
  202.         "missing_time_in_millis": 0,
  203.         "current": 0
  204.       },
  205.       "search": {
  206.         "open_contexts": 0,
  207.         "query_total": 12,
  208.         "query_time_in_millis": 11,
  209.         "query_current": 0,
  210.         "fetch_total": 12,
  211.         "fetch_time_in_millis": 5,
  212.         "fetch_current": 0,
  213.         "scroll_total": 0,
  214.         "scroll_time_in_millis": 0,
  215.         "scroll_current": 0,
  216.         "point_in_time_total": 0,
  217.         "point_in_time_time_in_millis": 0,
  218.         "point_in_time_current": 0,
  219.         "suggest_total": 0,
  220.         "suggest_time_in_millis": 0,
  221.         "suggest_current": 0
  222.       },
  223.       "merges": {
  224.         "current": 0,
  225.         "current_docs": 0,
  226.         "current_size_in_bytes": 0,
  227.         "total": 0,
  228.         "total_time_in_millis": 0,
  229.         "total_docs": 0,
  230.         "total_size_in_bytes": 0,
  231.         "total_stopped_time_in_millis": 0,
  232.         "total_throttled_time_in_millis": 0,
  233.         "total_auto_throttle_in_bytes": 20971520
  234.       },
  235.       "refresh": {
  236.         "total": 8,
  237.         "total_time_in_millis": 58,
  238.         "external_total": 7,
  239.         "external_total_time_in_millis": 60,
  240.         "listeners": 0
  241.       },
  242.       "flush": {
  243.         "total": 1,
  244.         "periodic": 1,
  245.         "total_time_in_millis": 21
  246.       },
  247.       "warmer": {
  248.         "current": 0,
  249.         "total": 6,
  250.         "total_time_in_millis": 0
  251.       },
  252.       "query_cache": {
  253.         "memory_size_in_bytes": 0,
  254.         "total_count": 0,
  255.         "hit_count": 0,
  256.         "miss_count": 0,
  257.         "cache_size": 0,
  258.         "cache_count": 0,
  259.         "evictions": 0
  260.       },
  261.       "fielddata": {
  262.         "memory_size_in_bytes": 0,
  263.         "evictions": 0
  264.       },
  265.       "completion": {
  266.         "size_in_bytes": 0
  267.       },
  268.       "segments": {
  269.         "count": 4,
  270.         "memory_in_bytes": 0,
  271.         "terms_memory_in_bytes": 0,
  272.         "stored_fields_memory_in_bytes": 0,
  273.         "term_vectors_memory_in_bytes": 0,
  274.         "norms_memory_in_bytes": 0,
  275.         "points_memory_in_bytes": 0,
  276.         "doc_values_memory_in_bytes": 0,
  277.         "index_writer_memory_in_bytes": 0,
  278.         "version_map_memory_in_bytes": 0,
  279.         "fixed_bit_set_memory_in_bytes": 0,
  280.         "max_unsafe_auto_id_timestamp": -1,
  281.         "remote_store" : {
  282.           "upload" : {
  283.             "total_upload_size" : {
  284.               "started_bytes" : 152419,
  285.               "succeeded_bytes" : 152419,
  286.               "failed_bytes" : 0
  287.             },
  288.             "refresh_size_lag" : {
  289.               "total_bytes" : 0,
  290.               "max_bytes" : 0
  291.             },
  292.             "max_refresh_time_lag_in_millis" : 0,
  293.             "total_time_spent_in_millis" : 516,
  294.             "pressure" : {
  295.               "total_rejections" : 0
  296.             }
  297.           },
  298.           "download" : {
  299.             "total_download_size" : {
  300.               "started_bytes" : 0,
  301.               "succeeded_bytes" : 0,
  302.               "failed_bytes" : 0
  303.             },
  304.             "total_time_spent_in_millis" : 0
  305.           }
  306.         },
  307.         "file_sizes": {}
  308.       },
  309.       "translog": {
  310.         "operations": 0,
  311.         "size_in_bytes": 55,
  312.         "uncommitted_operations": 0,
  313.         "uncommitted_size_in_bytes": 55,
  314.         "earliest_last_modified_age": 142622215,
  315.         "remote_store" : {
  316.           "upload" : {
  317.             "total_uploads" : {
  318.               "started" : 57,
  319.               "failed" : 0,
  320.               "succeeded" : 57
  321.             },
  322.             "total_upload_size" : {
  323.               "started_bytes" : 16830,
  324.               "failed_bytes" : 0,
  325.               "succeeded_bytes" : 16830
  326.             }
  327.           }
  328.         }
  329.       },
  330.       "request_cache": {
  331.         "memory_size_in_bytes": 0,
  332.         "evictions": 0,
  333.         "hit_count": 0,
  334.         "miss_count": 0
  335.       },
  336.       "recovery": {
  337.         "current_as_source": 0,
  338.         "current_as_target": 0,
  339.         "throttle_time_in_millis": 0
  340.       }
  341.     }
  342.   },
  343.   "indices": {
  344.     "testindex": {
  345.       "uuid": "0SXXSpe9Rp-FpxXXWLOD8Q",
  346.       "primaries": {
  347.         "docs": {
  348.           "count": 4,
  349.           "deleted": 0
  350.         },
  351.         "store": {
  352.           "size_in_bytes": 15531,
  353.           "reserved_in_bytes": 0
  354.         },
  355.         "indexing": {
  356.           "index_total": 4,
  357.           "index_time_in_millis": 10,
  358.           "index_current": 0,
  359.           "index_failed": 0,
  360.           "delete_total": 0,
  361.           "delete_time_in_millis": 0,
  362.           "delete_current": 0,
  363.           "noop_update_total": 0,
  364.           "is_throttled": false,
  365.           "throttle_time_in_millis": 0
  366.         },
  367.         "get": {
  368.           "total": 0,
  369.           "time_in_millis": 0,
  370.           "exists_total": 0,
  371.           "exists_time_in_millis": 0,
  372.           "missing_total": 0,
  373.           "missing_time_in_millis": 0,
  374.           "current": 0
  375.         },
  376.         "search": {
  377.           "open_contexts": 0,
  378.           "query_total": 12,
  379.           "query_time_in_millis": 11,
  380.           "query_current": 0,
  381.           "fetch_total": 12,
  382.           "fetch_time_in_millis": 5,
  383.           "fetch_current": 0,
  384.           "scroll_total": 0,
  385.           "scroll_time_in_millis": 0,
  386.           "scroll_current": 0,
  387.           "point_in_time_total": 0,
  388.           "point_in_time_time_in_millis": 0,
  389.           "point_in_time_current": 0,
  390.           "suggest_total": 0,
  391.           "suggest_time_in_millis": 0,
  392.           "suggest_current": 0
  393.         },
  394.         "merges": {
  395.           "current": 0,
  396.           "current_docs": 0,
  397.           "current_size_in_bytes": 0,
  398.           "total": 0,
  399.           "total_time_in_millis": 0,
  400.           "total_docs": 0,
  401.           "total_size_in_bytes": 0,
  402.           "total_stopped_time_in_millis": 0,
  403.           "total_throttled_time_in_millis": 0,
  404.           "total_auto_throttle_in_bytes": 20971520
  405.         },
  406.         "refresh": {
  407.           "total": 8,
  408.           "total_time_in_millis": 58,
  409.           "external_total": 7,
  410.           "external_total_time_in_millis": 60,
  411.           "listeners": 0
  412.         },
  413.         "flush": {
  414.           "total": 1,
  415.           "periodic": 1,
  416.           "total_time_in_millis": 21
  417.         },
  418.         "warmer": {
  419.           "current": 0,
  420.           "total": 6,
  421.           "total_time_in_millis": 0
  422.         },
  423.         "query_cache": {
  424.           "memory_size_in_bytes": 0,
  425.           "total_count": 0,
  426.           "hit_count": 0,
  427.           "miss_count": 0,
  428.           "cache_size": 0,
  429.           "cache_count": 0,
  430.           "evictions": 0
  431.         },
  432.         "fielddata": {
  433.           "memory_size_in_bytes": 0,
  434.           "evictions": 0
  435.         },
  436.         "completion": {
  437.           "size_in_bytes": 0
  438.         },
  439.         "segments": {
  440.           "count": 4,
  441.           "memory_in_bytes": 0,
  442.           "terms_memory_in_bytes": 0,
  443.           "stored_fields_memory_in_bytes": 0,
  444.           "term_vectors_memory_in_bytes": 0,
  445.           "norms_memory_in_bytes": 0,
  446.           "points_memory_in_bytes": 0,
  447.           "doc_values_memory_in_bytes": 0,
  448.           "index_writer_memory_in_bytes": 0,
  449.           "version_map_memory_in_bytes": 0,
  450.           "fixed_bit_set_memory_in_bytes": 0,
  451.           "max_unsafe_auto_id_timestamp": -1,
  452.           "remote_store" : {
  453.             "upload" : {
  454.               "total_upload_size" : {
  455.                 "started_bytes" : 152419,
  456.                 "succeeded_bytes" : 152419,
  457.                 "failed_bytes" : 0
  458.               },
  459.               "refresh_size_lag" : {
  460.                 "total_bytes" : 0,
  461.                 "max_bytes" : 0
  462.               },
  463.               "max_refresh_time_lag_in_millis" : 0,
  464.               "total_time_spent_in_millis" : 516,
  465.               "pressure" : {
  466.                 "total_rejections" : 0
  467.               }
  468.             },
  469.             "download" : {
  470.               "total_download_size" : {
  471.                 "started_bytes" : 0,
  472.                 "succeeded_bytes" : 0,
  473.                 "failed_bytes" : 0
  474.               },
  475.               "total_time_spent_in_millis" : 0
  476.             }
  477.           },
  478.           "file_sizes": {}
  479.         },
  480.         "translog": {
  481.           "operations": 0,
  482.           "size_in_bytes": 55,
  483.           "uncommitted_operations": 0,
  484.           "uncommitted_size_in_bytes": 55,
  485.           "earliest_last_modified_age": 142622215,
  486.           "remote_store" : {
  487.             "upload" : {
  488.               "total_uploads" : {
  489.                 "started" : 57,
  490.                 "failed" : 0,
  491.                 "succeeded" : 57
  492.               },
  493.               "total_upload_size" : {
  494.                 "started_bytes" : 16830,
  495.                 "failed_bytes" : 0,
  496.                 "succeeded_bytes" : 16830
  497.               }
  498.             }
  499.           }
  500.         },
  501.         "request_cache": {
  502.           "memory_size_in_bytes": 0,
  503.           "evictions": 0,
  504.           "hit_count": 0,
  505.           "miss_count": 0
  506.         },
  507.         "recovery": {
  508.           "current_as_source": 0,
  509.           "current_as_target": 0,
  510.           "throttle_time_in_millis": 0
  511.         }
  512.       },
  513.       "total": {
  514.         "docs": {
  515.           "count": 4,
  516.           "deleted": 0
  517.         },
  518.         "store": {
  519.           "size_in_bytes": 15531,
  520.           "reserved_in_bytes": 0
  521.         },
  522.         "indexing": {
  523.           "index_total": 4,
  524.           "index_time_in_millis": 10,
  525.           "index_current": 0,
  526.           "index_failed": 0,
  527.           "delete_total": 0,
  528.           "delete_time_in_millis": 0,
  529.           "delete_current": 0,
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  533.         },
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  537.           "exists_total": 0,
  538.           "exists_time_in_millis": 0,
  539.           "missing_total": 0,
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  543.         "search": {
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  547.           "query_current": 0,
  548.           "fetch_total": 12,
  549.           "fetch_time_in_millis": 5,
  550.           "fetch_current": 0,
  551.           "scroll_total": 0,
  552.           "scroll_time_in_millis": 0,
  553.           "scroll_current": 0,
  554.           "point_in_time_total": 0,
  555.           "point_in_time_time_in_millis": 0,
  556.           "point_in_time_current": 0,
  557.           "suggest_total": 0,
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  570.           "total_throttled_time_in_millis": 0,
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  573.         "refresh": {
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  575.           "total_time_in_millis": 58,
  576.           "external_total": 7,
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  592.           "total_count": 0,
  593.           "hit_count": 0,
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  599.         "fielddata": {
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  609.           "terms_memory_in_bytes": 0,
  610.           "stored_fields_memory_in_bytes": 0,
  611.           "term_vectors_memory_in_bytes": 0,
  612.           "norms_memory_in_bytes": 0,
  613.           "points_memory_in_bytes": 0,
  614.           "doc_values_memory_in_bytes": 0,
  615.           "index_writer_memory_in_bytes": 0,
  616.           "version_map_memory_in_bytes": 0,
  617.           "fixed_bit_set_memory_in_bytes": 0,
  618.           "max_unsafe_auto_id_timestamp": -1,
  619.           "remote_store" : {
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  623.                 "succeeded_bytes" : 152419,
  624.                 "failed_bytes" : 0
  625.               },
  626.               "refresh_size_lag" : {
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  628.                 "max_bytes" : 0
  629.               },
  630.               "max_refresh_time_lag_in_millis" : 0,
  631.               "total_time_spent_in_millis" : 516,
  632.               "pressure" : {
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  634.               }
  635.             },
  636.             "download" : {
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  640.                 "failed_bytes" : 0
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  644.           },
  645.           "file_sizes": {}
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  647.         "translog": {
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  652.           "earliest_last_modified_age": 142622215,
  653.           "remote_store" : {
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  657.                 "failed" : 0,
  658.                 "succeeded" : 57
  659.               },
  660.               "total_upload_size" : {
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  663.                 "succeeded_bytes" : 16830
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  667.         },
  668.         "request_cache": {
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  670.           "evictions": 0,
  671.           "hit_count": 0,
  672.           "miss_count": 0
  673.         },
  674.         "recovery": {
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  676.           "current_as_target": 0,
  677.           "throttle_time_in_millis": 0
  678.         }
  679.       }
  680.     }
  681.   }
  682. }

Response body fields

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