Nodes Statsedit

Nodes statisticsedit

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


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


HTTP connection information


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


TCP information


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


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


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


Transport statistics about sent and received bytes in cluster communication


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/'
# or, if you like the other way
curl -XGET 'http://localhost:9200/_nodes/stats/process'
curl -XGET 'http://localhost:9200/_nodes/'

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

Field data statisticsedit

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