Disk Metrics
Every 10 seconds, the collectd service uses the disk plugin to gather the following disk metrics on each node in the cluster.
Name | Description | Additional Tag(s) |
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disk.disk_await | The average time in milliseconds to complete I/O requests. This includes the time request are waiting in queue and the time spent processing the request. This metric is available as of EEP 3.0. |
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disk.disk_avg_requests_size | The average size in kilobytes for I/O requests issued to the disk. This metric is available as of EEP 3.0. |
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disk.disk_avg_queue_size | The average number of requests issued to the disk. This metric is available as of EEP 3.0. |
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disk.disk_io_time.io_time | The disk I/O time in milliseconds (ms). |
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disk.disk_io_time.weighted_io_time | The aggregate time in milliseconds (ms) spent on I/O operations that are either in progress or have completed |
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disk.disk_merged.read | The number of physical read operations. |
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disk.disk_merged.write | The number of physical write operations. |
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disk.disk_octets.read | The number of bytes read from disk. |
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disk.disk_octets.write | The number of bytes written to disk. |
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disk.disk_ops.read | The number of completed read operations. |
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disk.disk_ops.write | The number of completed write operations. |
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disk.disk_time.read | The average time in milliseconds(ms) to read from disk. |
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disk.disk_time.write | The average time in milliseconds(ms) to write to disk. |
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disk.disk_utilization | The disk utilization percentage. This metric is available as of EEP 3.0. |
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disk.pending_operations | The number of pending disk operations. |
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