Technologies/Elasticsearch/elasticsearch.node.disk.io.write
ElasticsearchElasticsearchMetric

elasticsearch.node.disk.io.write

Disk write operations
Dimensions:None
Available on:DynatraceDynatrace (2)PrometheusPrometheus (1)DatadogDatadog (1)OpenTelemetryOpenTelemetry (1)

Summary

Measures disk write I/O operations performed by the node, tracking indexing activity and segment merge overhead. High write rates indicate active indexing or merge operations. Sustained writes at disk capacity limits trigger I/O saturation, slowing indexing throughput and potentially causing merge throttling (see "Merge Throttling Write Amplification" insight). Monitoring write operations helps identify disk bottlenecks before they impact cluster performance.

Interface Metrics (5)
DynatraceDynatrace
Total kilobytes written to disk
Dimensions:None
PrometheusPrometheus
Total kilobytes written to disk
Dimensions:None
DatadogDatadog
The total number of writes to the file store [v1.0+].
Dimensions:None
OpenTelemetryOpenTelemetry
The total number of kilobytes written across all file stores for this node.
Dimensions:None
DynatraceDynatrace
Amount of write operations per second
Dimensions:None
Sources
elasticsearch_filesystem_io_stats_device_write_size_kilobytes_sumwww.dynatrace.com
filesystem_io_stats_device_write_size_kilobytes_sumgithub.com
elasticsearch.fs.total.disk_writesgithub.com
elasticsearch.node.disk.io.writegithub.com
Related Insights (1)
Index Recovery Prolonged Durationwarning

Slow shard recovery after node failures or restarts delays cluster stabilization and can indicate network issues, disk I/O bottlenecks, or configuration problems.

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