Nodes

Activity

Indexing rate

Number of documents being indexed per second on all primary and replica shards hosted on the node.

Indexing latency

Average latency for indexing documents, which is the time it takes to index documents divided by the number that were indexed in all primary and replica shards hosted on the node.

Search rate

Number of search requests being executed per second on all shards hosted on the node.

Search latency

Average latency for searching, which is the time it takes to execute searches divided by the number of searches submitted to the node.

Host and Process

Load

Load average of the node over the last five minutes.

CPU

Percentage of the CPU usage for the Elasticsearch process running on the node.

Heap used in bytes

Total JVM heap memory used by the Elasticsearch process running on the node.

GC

Average time spent doing GC in milliseconds on the node.

Thread pools

Write

Number of index, bulk and write operations in the queue, as well as the total number of completed and rejected operations in those pools.

Search

Number of search operations in the queue, as well as the total number of completed and rejected operations in that pool.

Management

Number of management operations in the queue, as well as the total number of completed and rejected operations in that pool.

Snapshot

Number of snapshot operations in the queue, as well as the total number of completed and rejected operations in that pool.

Data

Disk usage

Amount of used disk storage on the node.

Shards count

Number of primary and replica shards hosted on the node.

Segment count

Number of segments hosted on the node.

Documents count

Number of documents hosted on the node.

HTTP

HTTP current open

Current number of open HTTP connections for the node.

HTTP connections open rate

Number of HTTP connections opened per second.

Circuit breakers

Parent Used

Estimated memory used for the parent circuit breaker.

Field Data used

Estimated memory used for the field data circuit breaker.

Request used

Estimated memory used for the request circuit breaker.

Parent tripped

Total number of times the parent circuit breaker has been triggered and prevented an out-of-memory error.

Field data tripped

Total number of times the field data circuit breaker has been triggered and prevented an-out-of memory error.

Request tripped

Total number of times the request circuit breaker has been triggered and prevented an out-of-memory error.

Network

Network rx bytes

Size of RX packets received by the node during internal cluster communication.

Network rx count

Total number of RX packets received by the node during internal cluster communication.

Network tx bytes

Size of TX packets sent by the node during internal cluster communication.

Network tx count

Total number of TX packets received by the node during internal cluster communication.

Disk

Disk read bytes

The total number of bytes read across all devices used by Elasticsearch.

Disk read IOPS

The total number of completed read operations across all devices used by Elasticsearch.

Disk write bytes

The total number of bytes written across all devices used by Elasticsearch.

Disk write IOPS

The total number of completed write operations across all devices used by Elasticsearch.

Activity-Additional

Merge rate

Number of merge operations being executed per second on all shards hosted on the node.

Merge latency

Average latency for merging, which is the time it takes to execute merges divided by the number of merge operations submitted to the node.

Indexing failed

Number of failed indexing operations on the node.