2013-08-28 19:24:34 -04:00
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[[cluster-nodes-stats]]
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== Nodes Stats
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[float]
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=== Nodes statistics
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The cluster nodes stats API allows to retrieve one or more (or all) of
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the cluster nodes statistics.
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[source,js]
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--------------------------------------------------
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curl -XGET 'http://localhost:9200/_cluster/nodes/stats'
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curl -XGET 'http://localhost:9200/_cluster/nodes/nodeId1,nodeId2/stats'
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# simplified
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curl -XGET 'http://localhost:9200/_nodes/stats'
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curl -XGET 'http://localhost:9200/_nodes/nodeId1,nodeId2/stats'
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--------------------------------------------------
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The first command retrieves stats of all the nodes in the cluster. The
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second command selectively retrieves nodes stats of only `nodeId1` and
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`nodeId2`. All the nodes selective options are explained
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<<cluster-nodes,here>>.
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By default, `indices` stats are returned. With options for `indices`,
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`os`, `process`, `jvm`, `network`, `transport`, `http`, `fs`, and
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`thread_pool`. For example:
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[horizontal]
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`indices`::
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Indices stats about size, document count, indexing and
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deletion times, search times, field cache size , merges and flushes
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`fs`::
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File system information, data path, free disk space, read/write
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stats
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`http`::
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HTTP connection information
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`jvm`::
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JVM stats, memory pool information, garbage collection, buffer
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pools
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`network`::
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TCP information
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`os`::
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Operating system stats, load average, cpu, mem, swap
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`process`::
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Process statistics, memory consumption, cpu usage, open
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file descriptors
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`thread_pool`::
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Statistics about each thread pool, including current
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size, queue and rejected tasks
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`transport`::
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Transport statistics about sent and received bytes in
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cluster communication
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`clear`::
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Clears all the flags (first). Useful, if you only want to
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retrieve specific stats.
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[source,js]
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--------------------------------------------------
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# return indices and os
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curl -XGET 'http://localhost:9200/_nodes/stats?os=true'
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# return just os and process
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curl -XGET 'http://localhost:9200/_nodes/stats?clear=true&os=true&process=true'
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# specific type endpoint
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curl -XGET 'http://localhost:9200/_nodes/process/stats'
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curl -XGET 'http://localhost:9200/_nodes/10.0.0.1/process/stats'
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# or, if you like the other way
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curl -XGET 'http://localhost:9200/_nodes/stats/process'
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curl -XGET 'http://localhost:9200/_nodes/10.0.0.1/stats/process'
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--------------------------------------------------
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The `all` flag can be set to return all the stats.
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[float]
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=== Field data statistics
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2013-09-03 15:27:49 -04:00
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You can get information about field data memory usage on node
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2013-08-28 19:24:34 -04:00
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level or on index level.
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[source,js]
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--------------------------------------------------
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# Node Stats
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curl localhost:9200/_nodes/stats/indices/fielddata/field1,field2?pretty
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# Indices Stat
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curl localhost:9200/_stats/fielddata/field1,field2?pretty
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# You can use wildcards for field names
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curl localhost:9200/_stats/fielddata/field*?pretty
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curl localhost:9200/_nodes/stats/indices/fielddata/field*?pretty
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--------------------------------------------------
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