# 集群统计(Cluster Stats) Cluster Stats API 允许从集群范围的角度检索统计数据。该API返回基本的索引指标(shard数据、存储大小、内存使用量)以及关于当前节点的信息，这些节点形成集群(数量、角色、os、jvm版本、内存使用、cpu和安装的插件)。 ~~~ GET /_cluster/stats?human&pretty ~~~ 将会返回 ~~~ { "_nodes" : { "total" : 1, "successful" : 1, "failed" : 0 }, "cluster_name": "elasticsearch", "timestamp": 1459427693515, "status": "green", "indices": { "count": 1, "shards": { "total": 5, "primaries": 5, "replication": 0, "index": { "shards": { "min": 5, "max": 5, "avg": 5 }, "primaries": { "min": 5, "max": 5, "avg": 5 }, "replication": { "min": 0, "max": 0, "avg": 0 } } }, "docs": { "count": 10, "deleted": 0 }, "store": { "size": "16.2kb", "size_in_bytes": 16684 }, "fielddata": { "memory_size": "0b", "memory_size_in_bytes": 0, "evictions": 0 }, "query_cache": { "memory_size": "0b", "memory_size_in_bytes": 0, "total_count": 0, "hit_count": 0, "miss_count": 0, "cache_size": 0, "cache_count": 0, "evictions": 0 }, "completion": { "size": "0b", "size_in_bytes": 0 }, "segments": { "count": 4, "memory": "8.6kb", "memory_in_bytes": 8898, "terms_memory": "6.3kb", "terms_memory_in_bytes": 6522, "stored_fields_memory": "1.2kb", "stored_fields_memory_in_bytes": 1248, "term_vectors_memory": "0b", "term_vectors_memory_in_bytes": 0, "norms_memory": "384b", "norms_memory_in_bytes": 384, "points_memory" : "0b", "points_memory_in_bytes" : 0, "doc_values_memory": "744b", "doc_values_memory_in_bytes": 744, "index_writer_memory": "0b", "index_writer_memory_in_bytes": 0, "version_map_memory": "0b", "version_map_memory_in_bytes": 0, "fixed_bit_set": "0b", "fixed_bit_set_memory_in_bytes": 0, "max_unsafe_auto_id_timestamp" : -9223372036854775808, "file_sizes": {} } }, "nodes": { "count": { "total": 1, "data": 1, "coordinating_only": 0, "master": 1, "ingest": 1 }, "versions": [ "6.0.0" ], "os": { "available_processors": 8, "allocated_processors": 8, "names": [ { "name": "Mac OS X", "count": 1 } ], "mem" : { "total" : "16gb", "total_in_bytes" : 17179869184, "free" : "78.1mb", "free_in_bytes" : 81960960, "used" : "15.9gb", "used_in_bytes" : 17097908224, "free_percent" : 0, "used_percent" : 100 } }, "process": { "cpu": { "percent": 9 }, "open_file_descriptors": { "min": 268, "max": 268, "avg": 268 } }, "jvm": { "max_uptime": "13.7s", "max_uptime_in_millis": 13737, "versions": [ { "version": "1.8.0_74", "vm_name": "Java HotSpot(TM) 64-Bit Server VM", "vm_version": "25.74-b02", "vm_vendor": "Oracle Corporation", "count": 1 } ], "mem": { "heap_used": "57.5mb", "heap_used_in_bytes": 60312664, "heap_max": "989.8mb", "heap_max_in_bytes": 1037959168 }, "threads": 90 }, "fs": { "total": "200.6gb", "total_in_bytes": 215429193728, "free": "32.6gb", "free_in_bytes": 35064553472, "available": "32.4gb", "available_in_bytes": 34802409472 }, "plugins": [ { "name": "analysis-icu", "version": "6.0.0", "description": "The ICU Analysis plugin integrates Lucene ICU module into elasticsearch, adding ICU relates analysis components.", "classname": "org.elasticsearch.plugin.analysis.icu.AnalysisICUPlugin", "has_native_controller": false }, { "name": "ingest-geoip", "version": "6.0.0", "description": "Ingest processor that uses looksup geo data based on ip adresses using the Maxmind geo database", "classname": "org.elasticsearch.ingest.geoip.IngestGeoIpPlugin", "has_native_controller": false }, { "name": "ingest-user-agent", "version": "6.0.0", "description": "Ingest processor that extracts information from a user agent", "classname": "org.elasticsearch.ingest.useragent.IngestUserAgentPlugin", "has_native_controller": false } ], "network_types" : { "transport_types" : { "netty4" : 1 }, "http_types" : { "netty4" : 1 } } } } ~~~