178 lines
5.0 KiB
Plaintext
178 lines
5.0 KiB
Plaintext
[[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/_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, all stats are returned. You can limit this by combining any
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of `indices`, `os`, `process`, `jvm`, `transport`, `http`,
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`fs`, `breaker` and `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 (see <<fs-info,FS information>>)
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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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`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 (see <<process-stats,Process statistics>>)
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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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`breaker`::
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Statistics about the field data circuit breaker
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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'
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# return just os and process
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curl -XGET 'http://localhost:9200/_nodes/stats/os,process'
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# specific type endpoint
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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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[[fs-info]]
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==== FS information
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The `fs` flag can be set to retrieve
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information that concern the file system:
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`fs.timestamp`::
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Last time the file stores statistics have been refreshed
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`os.total.total_in_bytes`::
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Total size (in bytes) of all file stores
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`os.total.free_in_bytes`::
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Total number of unallocated bytes in all file stores
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`os.total.available_in_bytes`::
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Totalnumber of bytes available to this Java virtual machine on all file stores
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`os.data`::
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List of all file stores
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`os.data.path`::
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Path to the file store
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`os.data.mount`::
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Mount point of the file store (ex: /dev/sda2)
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`os.data.type`::
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Type of the file store (ex: ext4)
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`os.data.total_in_bytes`::
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Total size (in bytes) of thefile store
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`os.data.free_in_bytes`::
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Total number of unallocated bytes in the file store
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`os.data.available_in_bytes`::
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Totalnumber of bytes available to this Java virtual machine on this file store
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`os.data.spins` (Linux only)::
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Indicates if the file store is backed by spinning storage.
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`null` means we could not determine it, `true` means the device possibly spins
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and `false` means it does not (ex: solid-state disks).
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[float]
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[[process-stats]]
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==== Process statistics
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The `process` flag can be set to retrieve statistics that concern
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the current running process:
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`process.timestamp`::
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Last time the process statistics have been refreshed
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`process.open_file_descriptors`::
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Number of opened file descriptors associated with the current process, or -1 if not supported
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`process.max_file_descriptors`::
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Maximum number of file descriptors allowed on the system, or -1 if not supported
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`process.cpu.percent`::
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CPU usage in percent
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`process.cpu.total_in_millis`::
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CPU time (in milliseconds) used by the process on which the Java virtual machine is running, or -1 if not supported
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`process.mem.total_virtual_in_bytes`::
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Size in bytes of virtual memory that is guaranteed to be available to the running process
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[float]
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[[field-data]]
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=== Field data statistics
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You can get information about field data memory usage on node
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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 -XGET 'http://localhost:9200/_nodes/stats/indices/?fields=field1,field2&pretty'
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# Indices Stat
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curl -XGET 'http://localhost:9200/_stats/fielddata/?fields=field1,field2&pretty'
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# You can use wildcards for field names
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curl -XGET 'http://localhost:9200/_stats/fielddata/?fields=field*&pretty'
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curl -XGET 'http://localhost:9200/_nodes/stats/indices/?fields=field*&pretty'
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--------------------------------------------------
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[float]
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[[search-groups]]
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=== Search groups
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You can get statistics about search groups for searches executed
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on this node.
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[source,js]
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--------------------------------------------------
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# All groups with all stats
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curl -XGET 'http://localhost:9200/_nodes/stats?pretty&groups=_all'
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# Some groups from just the indices stats
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curl -XGET 'http://localhost:9200/_nodes/stats/indices?pretty&groups=foo,bar'
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--------------------------------------------------
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