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WARNING: Version 0.90 of Elasticsearch has passed its EOL date.

This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.

« Cluster Update Settings Nodes Info »
Elastic Docs ›Reference [0.90] ›Cluster APIs

Nodes Stats

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Nodes Stats

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Nodes statistics

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The cluster nodes stats API allows to retrieve one or more (or all) of the cluster nodes statistics.

curl -XGET 'http://localhost:9200/_cluster/nodes/stats'
curl -XGET 'http://localhost:9200/_cluster/nodes/nodeId1,nodeId2/stats'

# simplified
curl -XGET 'http://localhost:9200/_nodes/stats'
curl -XGET 'http://localhost:9200/_nodes/nodeId1,nodeId2/stats'

The first command retrieves stats of all the nodes in the cluster. The second command selectively retrieves nodes stats of only nodeId1 and nodeId2. All the nodes selective options are explained here.

By default, indices stats are returned. With options for indices, os, process, jvm, network, transport, http, fs, and thread_pool. For example:

indices

Indices stats about size, document count, indexing and deletion times, search times, field cache size , merges and flushes

fs

File system information, data path, free disk space, read/write stats

http

HTTP connection information

jvm

JVM stats, memory pool information, garbage collection, buffer pools

network

TCP information

os

Operating system stats, load average, cpu, mem, swap

process

Process statistics, memory consumption, cpu usage, open file descriptors

thread_pool

Statistics about each thread pool, including current size, queue and rejected tasks

transport

Transport statistics about sent and received bytes in cluster communication

clear

Clears all the flags (first). Useful, if you only want to retrieve specific stats. 

# return indices and os
curl -XGET 'http://localhost:9200/_nodes/stats?os=true'
# return just os and process
curl -XGET 'http://localhost:9200/_nodes/stats?clear=true&os=true&process=true'
# specific type endpoint
curl -XGET 'http://localhost:9200/_nodes/process/stats'
curl -XGET 'http://localhost:9200/_nodes/10.0.0.1/process/stats'
# or, if you like the other way
curl -XGET 'http://localhost:9200/_nodes/stats/process'
curl -XGET 'http://localhost:9200/_nodes/10.0.0.1/stats/process'

The all flag can be set to return all the stats.

Field data statistics

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From 0.90, you can get information about field data memory usage on node level or on index level.

# Node Stats
curl localhost:9200/_nodes/stats/indices/fielddata/field1,field2?pretty

# Indices Stat
curl localhost:9200/_stats/fielddata/field1,field2?pretty

# You can use wildcards for field names
curl localhost:9200/_stats/fielddata/field*?pretty
curl localhost:9200/_nodes/stats/indices/fielddata/field*?pretty
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