集群统计
集群统计 API 提供了和 节点统计 相似的输出。 但有一个重要的区别：节点统计显示的是每个节点上的统计值，而 集群统计 展示的是对于单个指标，所有节点的总和值。
这里面提供一些很值得一看的统计值。比如说你可以看到，整个集群用了 50% 的堆内存，或者说过滤器缓存的驱逐情况不严重。这个接口主要用途是提供一个比 集群健康 更详细、但又没有 节点统计 那么详细的快速概览。对于非常大的集群来说也很有用，因为那时候 节点统计 的输出已经非常难于阅读了。
这个 API 可以像下面这样调用：
GET _cluster/stats
{
"_nodes": {
"total": 3,
"successful": 3,
"failed": 0
},
"cluster_name": "a2ff16d9aa2645dc87ab1714e6e16a84",
"cluster_uuid": "ZjfLI0y8QkyT28Q0cVcI2w",
"timestamp": 1657862967234,
"status": "yellow",
"indices": {
"count": 95,
"shards": {
"total": 194,
"primaries": 97,
"replication": 1,
"index": {
"shards": {
"min": 2,
"max": 6,
"avg": 2.042105263157895
},
"primaries": {
"min": 1,
"max": 3,
"avg": 1.0210526315789474
},
"replication": {
"min": 1,
"max": 1,
"avg": 1
}
}
},
"docs": {
"count": 8179616,
"deleted": 3604
},
"store": {
"size_in_bytes": 7312447557,
"total_data_set_size_in_bytes": 7312447557,
"reserved_in_bytes": 0
},
"fielddata": {
"memory_size_in_bytes": 928,
"evictions": 0
},
"query_cache": {
"memory_size_in_bytes": 3102124,
"total_count": 26571348,
"hit_count": 2356601,
"miss_count": 24214747,
"cache_size": 418,
"cache_count": 27062,
"evictions": 26644
},
"completion": {
"size_in_bytes": 0
},
"segments": {
"count": 434,
"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": 10516644,
"version_map_memory_in_bytes": 1212,
"fixed_bit_set_memory_in_bytes": 1592256,
"max_unsafe_auto_id_timestamp": 1657774689022,
"file_sizes": {}
},
"mappings": {
"field_types": [
{
"name": "alias",
"count": 1027,
"index_count": 8,
"script_count": 0
},
{
"name": "boolean",
"count": 207,
"index_count": 28,
"script_count": 0
},
{
"name": "byte",
"count": 1,
"index_count": 1,
"script_count": 0
},
{
"name": "constant_keyword",
"count": 15,
"index_count": 5,
"script_count": 0
},
{
"name": "date",
"count": 373,
"index_count": 64,
"script_count": 0
},
{
"name": "date_range",
"count": 1,
"index_count": 1,
"script_count": 0
},
{
"name": "double",
"count": 343,
"index_count": 6,
"script_count": 0
},
{
"name": "flattened",
"count": 12,
"index_count": 1,
"script_count": 0
},
{
"name": "float",
"count": 314,
"index_count": 15,
"script_count": 0
},
{
"name": "geo_point",
"count": 38,
"index_count": 8,
"script_count": 0
},
{
"name": "half_float",
"count": 24,
"index_count": 6,
"script_count": 0
},
{
"name": "integer",
"count": 13,
"index_count": 9,
"script_count": 0
},
{
"name": "ip",
"count": 78,
"index_count": 7,
"script_count": 0
},
{
"name": "ip_range",
"count": 1,
"index_count": 1,
"script_count": 0
},
{
"name": "keyword",
"count": 4783,
"index_count": 77,
"script_count": 0
},
{
"name": "long",
"count": 4229,
"index_count": 34,
"script_count": 0
},
{
"name": "match_only_text",
"count": 63,
"index_count": 1,
"script_count": 0
},
{
"name": "nested",
"count": 20,
"index_count": 4,
"script_count": 0
},
{
"name": "object",
"count": 5448,
"index_count": 43,
"script_count": 0
},
{
"name": "scaled_float",
"count": 154,
"index_count": 3,
"script_count": 0
},
{
"name": "short",
"count": 14,
"index_count": 7,
"script_count": 0
},
{
"name": "text",
"count": 239,
"index_count": 19,
"script_count": 0
},
{
"name": "version",
"count": 1,
"index_count": 1,
"script_count": 0
},
{
"name": "wildcard",
"count": 17,
"index_count": 1,
"script_count": 0
}
],
"runtime_field_types": []
},
"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
}
]
},
"versions": [
{
"version": "8.3.1",
"index_count": 95,
"primary_shard_count": 97,
"total_primary_bytes": 3385710034
}
]
},
"nodes": {
"count": {
"total": 3,
"coordinating_only": 0,
"data": 0,
"data_cold": 0,
"data_content": 2,
"data_frozen": 0,
"data_hot": 2,
"data_warm": 0,
"ingest": 2,
"master": 3,
"ml": 0,
"remote_cluster_client": 2,
"transform": 2,
"voting_only": 1
},
"versions": [
"8.3.1"
],
"os": {
"available_processors": 6,
"allocated_processors": 6,
"names": [
{
"name": "Linux",
"count": 3
}
],
"pretty_names": [
{
"pretty_name": "Ubuntu 20.04.4 LTS",
"count": 3
}
],
"architectures": [
{
"arch": "amd64",
"count": 3
}
],
"mem": {
"total_in_bytes": 9663676416,
"adjusted_total_in_bytes": 8531214336,
"free_in_bytes": 924491776,
"used_in_bytes": 8739184640,
"free_percent": 10,
"used_percent": 90
}
},
"process": {
"cpu": {
"percent": 6
},
"open_file_descriptors": {
"min": 852,
"max": 1372,
"avg": 1154
}
},
"jvm": {
"max_uptime_in_millis": 867151943,
"versions": [
{
"version": "18.0.1.1",
"vm_name": "OpenJDK 64-Bit Server VM",
"vm_version": "18.0.1.1+2-6",
"vm_vendor": "Oracle Corporation",
"bundled_jdk": true,
"using_bundled_jdk": true,
"count": 3
}
],
"mem": {
"heap_used_in_bytes": 2435488768,
"heap_max_in_bytes": 4198498304
},
"threads": 176
},
"fs": {
"total_in_bytes": 434865438720,
"free_in_bytes": 425859817472,
"available_in_bytes": 425859817472
},
"plugins": [],
"network_types": {
"transport_types": {
"security4": 3
},
"http_types": {
"security4": 3
}
},
"discovery_types": {
"multi-node": 3
},
"packaging_types": [
{
"flavor": "default",
"type": "docker",
"count": 3
}
],
"ingest": {
"number_of_pipelines": 35,
"processor_stats": {
"append": {
"count": 0,
"failed": 0,
"current": 0,
"time_in_millis": 0
},
"conditional": {
"count": 13757,
"failed": 2,
"current": 0,
"time_in_millis": 2039
},
"convert": {
"count": 0,
"failed": 0,
"current": 0,
"time_in_millis": 0
},
"date": {
"count": 1361166,
"failed": 2,
"current": 0,
"time_in_millis": 13095
},
"dot_expander": {
"count": 44712,
"failed": 0,
"current": 0,
"time_in_millis": 94
},
"geoip": {
"count": 0,
"failed": 0,
"current": 0,
"time_in_millis": 0
},
"grok": {
"count": 1366785,
"failed": 11,
"current": 0,
"time_in_millis": 45211
},
"gsub": {
"count": 0,
"failed": 0,
"current": 0,
"time_in_millis": 0
},
"json": {
"count": 5600,
"failed": 11,
"current": 0,
"time_in_millis": 134
},
"pipeline": {
"count": 0,
"failed": 0,
"current": 0,
"time_in_millis": 0
},
"remove": {
"count": 1391685,
"failed": 0,
"current": 0,
"time_in_millis": 522
},
"rename": {
"count": 61004,
"failed": 0,
"current": 0,
"time_in_millis": 101
},
"script": {
"count": 13745,
"failed": 11,
"current": 0,
"time_in_millis": 136
},
"set": {
"count": 6822207,
"failed": 0,
"current": 0,
"time_in_millis": 21445
},
"set_security_user": {
"count": 0,
"failed": 0,
"current": 0,
"time_in_millis": 0
},
"split": {
"count": 1355575,
"failed": 0,
"current": 0,
"time_in_millis": 1466
},
"trim": {
"count": 0,
"failed": 0,
"current": 0,
"time_in_millis": 0
},
"user_agent": {
"count": 0,
"failed": 0,
"current": 0,
"time_in_millis": 0
}
}
},
"indexing_pressure": {
"memory": {
"current": {
"combined_coordinating_and_primary_in_bytes": 0,
"coordinating_in_bytes": 0,
"primary_in_bytes": 0,
"replica_in_bytes": 0,
"all_in_bytes": 0
},
"total": {
"combined_coordinating_and_primary_in_bytes": 0,
"coordinating_in_bytes": 0,
"primary_in_bytes": 0,
"replica_in_bytes": 0,
"all_in_bytes": 0,
"coordinating_rejections": 0,
"primary_rejections": 0,
"replica_rejections": 0
},
"limit_in_bytes": 0
}
}
}
}
