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In this commit we are introducing a new section in REST API Reference for Nodes APIs. We are adding documentation for "Nodes hot threads" and "Nodes info". Because Nodes APIs share common request parameters we also add more detailed section into parent index page (notice that the nodes-filter parameter was moved from "Cluster stats" page and was improved, and relevant links were updated). There are more Nodes APIs that still need to be documented, this is just a good start. We updated nav_order parameter for some pages as well. Relevant ticket: #424 Signed-off-by: Lukáš Vlček <lukas.vlcek@aiven.io>
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| layout | title | parent | nav_order |
|---|---|---|---|
| default | Cluster stats | REST API reference | 65 |
Cluster stats
Introduced 1.0 {: .label .label-purple }
The cluster stats API operation returns statistics about your cluster.
Examples
GET _cluster/stats/nodes/_master
Path and HTTP methods
GET _cluster/stats
GET _cluster/stats/nodes/<node-filters>
URL parameters
All cluster stats parameters are optional.
| Parameter | Type | Description |
|---|---|---|
| <node-filters> | List | A comma-separated list of node-filters that OpenSearch uses to filter results. |
Response
{
"_nodes": {
"total": 1,
"successful": 1,
"failed": 0
},
"cluster_name": "opensearch-cluster",
"cluster_uuid": "QravFieJS_SlZJyBMcDMqQ",
"timestamp": 1644607845054,
"status": "yellow",
"indices": {
"count": 114,
"shards": {
"total": 121,
"primaries": 60,
"replication": 1.0166666666666666,
"index": {
"shards": {
"min": 1,
"max": 2,
"avg": 1.0614035087719298
},
"primaries": {
"min": 0,
"max": 2,
"avg": 0.5263157894736842
},
"replication": {
"min": 0.0,
"max": 1.0,
"avg": 0.008771929824561403
}
}
},
"docs": {
"count": 134263,
"deleted": 115
},
"store": {
"size_in_bytes": 70466547,
"reserved_in_bytes": 0
},
"fielddata": {
"memory_size_in_bytes": 664,
"evictions": 0
},
"query_cache": {
"memory_size_in_bytes": 0,
"total_count": 1,
"hit_count": 0,
"miss_count": 1,
"cache_size": 0,
"cache_count": 0,
"evictions": 0
},
"completion": {
"size_in_bytes": 0
},
"segments": {
"count": 341,
"memory_in_bytes": 3137244,
"terms_memory_in_bytes": 2488992,
"stored_fields_memory_in_bytes": 167672,
"term_vectors_memory_in_bytes": 0,
"norms_memory_in_bytes": 346816,
"points_memory_in_bytes": 0,
"doc_values_memory_in_bytes": 133764,
"index_writer_memory_in_bytes": 0,
"version_map_memory_in_bytes": 0,
"fixed_bit_set_memory_in_bytes": 1112,
"max_unsafe_auto_id_timestamp": 1644269449096,
"file_sizes": {}
},
"mappings": {
"field_types": [
{
"name": "alias",
"count": 1,
"index_count": 1
},
{
"name": "binary",
"count": 1,
"index_count": 1
},
{
"name": "boolean",
"count": 87,
"index_count": 22
},
{
"name": "date",
"count": 185,
"index_count": 91
},
{
"name": "double",
"count": 5,
"index_count": 2
},
{
"name": "float",
"count": 4,
"index_count": 1
},
{
"name": "geo_point",
"count": 4,
"index_count": 3
},
{
"name": "half_float",
"count": 12,
"index_count": 1
},
{
"name": "integer",
"count": 144,
"index_count": 29
},
{
"name": "ip",
"count": 2,
"index_count": 1
},
{
"name": "keyword",
"count": 1939,
"index_count": 109
},
{
"name": "knn_vector",
"count": 1,
"index_count": 1
},
{
"name": "long",
"count": 158,
"index_count": 92
},
{
"name": "nested",
"count": 25,
"index_count": 10
},
{
"name": "object",
"count": 420,
"index_count": 91
},
{
"name": "text",
"count": 1768,
"index_count": 102
}
]
},
"analysis": {
"char_filter_types": [],
"tokenizer_types": [],
"filter_types": [],
"analyzer_types": [],
"built_in_char_filters": [],
"built_in_tokenizers": [],
"built_in_filters": [],
"built_in_analyzers": [
{
"name": "english",
"count": 1,
"index_count": 1
}
]
}
},
"nodes": {
"count": {
"total": 1,
"coordinating_only": 0,
"data": 1,
"ingest": 1,
"master": 1,
"remote_cluster_client": 1
},
"versions": [
"1.2.4"
],
"os": {
"available_processors": 6,
"allocated_processors": 6,
"names": [
{
"name": "Linux",
"count": 1
}
],
"pretty_names": [
{
"pretty_name": "Amazon Linux 2",
"count": 1
}
],
"mem": {
"total_in_bytes": 6232674304,
"free_in_bytes": 1452658688,
"used_in_bytes": 4780015616,
"free_percent": 23,
"used_percent": 77
}
},
"process": {
"cpu": {
"percent": 0
},
"open_file_descriptors": {
"min": 970,
"max": 970,
"avg": 970
}
},
"jvm": {
"max_uptime_in_millis": 108800629,
"versions": [
{
"version": "15.0.1",
"vm_name": "OpenJDK 64-Bit Server VM",
"vm_version": "15.0.1+9",
"vm_vendor": "AdoptOpenJDK",
"bundled_jdk": true,
"using_bundled_jdk": true,
"count": 1
}
],
"mem": {
"heap_used_in_bytes": 178956256,
"heap_max_in_bytes": 536870912
},
"threads": 112
},
"fs": {
"total_in_bytes": 62725623808,
"free_in_bytes": 28442726400,
"available_in_bytes": 25226010624
},
"plugins": [
{
"name": "opensearch-index-management",
"version": "1.2.4.0",
"opensearch_version": "1.2.4",
"java_version": "1.8",
"description": "OpenSearch Index Management Plugin",
"classname": "org.opensearch.indexmanagement.IndexManagementPlugin",
"custom_foldername": "",
"extended_plugins": [
"opensearch-job-scheduler"
],
"has_native_controller": false
},
{
"name": "opensearch-security",
"version": "1.2.4.0",
"opensearch_version": "1.2.4",
"java_version": "1.8",
"description": "Provide access control related features for OpenSearch 1.0.0",
"classname": "org.opensearch.security.OpenSearchSecurityPlugin",
"custom_foldername": "opensearch-security",
"extended_plugins": [],
"has_native_controller": false
},
{
"name": "opensearch-cross-cluster-replication",
"version": "1.2.4.0",
"opensearch_version": "1.2.4",
"java_version": "1.8",
"description": "OpenSearch Cross Cluster Replication Plugin",
"classname": "org.opensearch.replication.ReplicationPlugin",
"custom_foldername": "",
"extended_plugins": [],
"has_native_controller": false
},
{
"name": "opensearch-job-scheduler",
"version": "1.2.4.0",
"opensearch_version": "1.2.4",
"java_version": "1.8",
"description": "OpenSearch Job Scheduler plugin",
"classname": "org.opensearch.jobscheduler.JobSchedulerPlugin",
"custom_foldername": "",
"extended_plugins": [],
"has_native_controller": false
},
{
"name": "opensearch-anomaly-detection",
"version": "1.2.4.0",
"opensearch_version": "1.2.4",
"java_version": "1.8",
"description": "OpenSearch anomaly detector plugin",
"classname": "org.opensearch.ad.AnomalyDetectorPlugin",
"custom_foldername": "",
"extended_plugins": [
"lang-painless",
"opensearch-job-scheduler"
],
"has_native_controller": false
},
{
"name": "opensearch-performance-analyzer",
"version": "1.2.4.0",
"opensearch_version": "1.2.4",
"java_version": "1.8",
"description": "OpenSearch Performance Analyzer Plugin",
"classname": "org.opensearch.performanceanalyzer.PerformanceAnalyzerPlugin",
"custom_foldername": "",
"extended_plugins": [],
"has_native_controller": false
},
{
"name": "opensearch-reports-scheduler",
"version": "1.2.4.0",
"opensearch_version": "1.2.4",
"java_version": "1.8",
"description": "Scheduler for Dashboards Reports Plugin",
"classname": "org.opensearch.reportsscheduler.ReportsSchedulerPlugin",
"custom_foldername": "",
"extended_plugins": [
"opensearch-job-scheduler"
],
"has_native_controller": false
},
{
"name": "opensearch-asynchronous-search",
"version": "1.2.4.0",
"opensearch_version": "1.2.4",
"java_version": "1.8",
"description": "Provides support for asynchronous search",
"classname": "org.opensearch.search.asynchronous.plugin.AsynchronousSearchPlugin",
"custom_foldername": "",
"extended_plugins": [],
"has_native_controller": false
},
{
"name": "opensearch-knn",
"version": "1.2.4.0",
"opensearch_version": "1.2.4",
"java_version": "1.8",
"description": "OpenSearch k-NN plugin",
"classname": "org.opensearch.knn.plugin.KNNPlugin",
"custom_foldername": "",
"extended_plugins": [
"lang-painless"
],
"has_native_controller": false
},
{
"name": "opensearch-alerting",
"version": "1.2.4.0",
"opensearch_version": "1.2.4",
"java_version": "1.8",
"description": "Amazon OpenSearch alerting plugin",
"classname": "org.opensearch.alerting.AlertingPlugin",
"custom_foldername": "",
"extended_plugins": [
"lang-painless"
],
"has_native_controller": false
},
{
"name": "opensearch-observability",
"version": "1.2.4.0",
"opensearch_version": "1.2.4",
"java_version": "1.8",
"description": "OpenSearch Plugin for OpenSearch Dashboards Observability",
"classname": "org.opensearch.observability.ObservabilityPlugin",
"custom_foldername": "",
"extended_plugins": [],
"has_native_controller": false
},
{
"name": "opensearch-sql",
"version": "1.2.4.0",
"opensearch_version": "1.2.4",
"java_version": "1.8",
"description": "OpenSearch SQL",
"classname": "org.opensearch.sql.plugin.SQLPlugin",
"custom_foldername": "",
"extended_plugins": [],
"has_native_controller": false
}
],
"network_types": {
"transport_types": {
"org.opensearch.security.ssl.http.netty.SecuritySSLNettyTransport": 1
},
"http_types": {
"org.opensearch.security.http.SecurityHttpServerTransport": 1
}
},
"discovery_types": {
"zen": 1
},
"packaging_types": [
{
"type": "tar",
"count": 1
}
],
"ingest": {
"number_of_pipelines": 0,
"processor_stats": {}
}
}
}
Response body fields
| Field | Description |
|---|---|
| nodes | How many nodes returned in the response. |
| cluster_name | The cluster's name. |
| cluster_uuid | The cluster's uuid. |
| timestamp | The Unix epoch time of when the cluster was last refreshed. |
| status | The cluster's health status. |
| indices | Statistics about the indexes in the cluster. |
| indices.count | How many indexes are in the cluster. |
| indices.shards | Information about the cluster's shards. |
| indices.docs | How many documents are still in the cluster and how many documents are deleted. |
| indices.store | Information about the cluster's storage. |
| indices.fielddata | Information about the cluster's field data |
| indices.query_cache | Data about the cluster's query cache. |
| indices.completion | How many bytes in memory are used to complete operations. |
| indices.segments | Information about the cluster's segments, which are small Lucene indexes. |
| indices.mappings | Mappings within the cluster. |
| indices.analysis | Information about analyzers used in the cluster. |
| nodes | Statistics about the nodes in the cluster. |
| nodes.count | How many nodes were returned from the request. |
| nodes.versions | OpenSearch's version number. |
| nodes.os | Information abotu the operating systems used in the nodes. |
| nodes.process | The processes the returned nodes use. |
| nodes.jvm | Statistics about the Java Virtual Machines in use. |
| nodes.fs | The nodes' file storage. |
| nodes.plugins | The OpenSearch plugins integrated within the nodes. |
| nodes.network_types | The transport and HTTP networks within the nodes. |
| nodes.discovery_type | The method the nodes use to find other nodes within the cluster. |
| nodes.packaging_types | Information about the nodes' OpenSearch distribution. |
| nodes.ingest | Information about the nodes' ingest pipelines/nodes, if there are any. |