Oracle Cloud Infrastructure Documentation

Block Volume Metrics

You can monitor the health, capacity, and performance of your block volumes and boot volumes by using metrics , alarms , and notifications.

This topic describes the metrics emitted by the metric namespace oci_blockstore (the Block Volume service)

Resources: Block volumes and boot volumes

See Using Block Volumes Service Metrics to Calculate Block Volume Throughput and IOPS for a walkthrough of a performance testing scenario with FIO that shows how you can use these metrics to determine the performance characteristics of your block volume.

Overview of Metrics for an Instance and Its Storage Devices

If you're not already familiar with the different types of metrics available for an instance and its storage and network devices, see Compute Instance Metrics.

Available Metrics: oci_blockstore

The Block Volume service metrics help you measure volume operations and throughput related to Compute instances.

The metrics listed in the following table are automatically available for any block volume or boot volume, regardless of whether the attached instance has monitoring enabled. You do not need to enable monitoring on the volumes to get these metrics.

You also can use the Monitoring service to create custom queries.

Each metric includes the following dimensions :

ATTACHMENTID
The OCID  of the volume attachment.
RESOURCEID
The OCID  of the volume.
Metric Metric Display Name Unit Description Dimensions
VolumeReadThroughput* Volume Read Throughput bytes Read throughput. Expressed as bytes read per interval.

attachmentId

resourceId

VolumeWriteThroughput* Volume Write Throughput bytes Write throughput. Expressed as bytes written per interval.
VolumeReadOps* Volume Read Operations reads Activity level from I/O reads. Expressed as reads per interval.
VolumeWriteOps* Volume Write Operations writes Activity level from I/O writes. Expressed as writes per interval.

* The Compute service separately reports network-related metrics as measured on the instance itself and aggregated across all the attached volumes. Those metrics are available in the oci_computeagent metric namespace. For more information, see Compute Instance Metrics.

Using the Console

To view default metric charts for a single volume
  1. Open the navigation menu. Under Core Infrastructure, go to Compute and click Instances.
  2. Click the instance to view its details.
  3. Under Resources, click either Attached Block Volumes or Boot Volume to view the volume you're interested in.
  4. Click the volume to view its details.
  5. Under Resources, click Metrics.

For more information about monitoring metrics and using alarms, see Monitoring Overview. For information about notifications for alarms, see Notifications Overview.

To view default metric charts for multiple volumes
  1. Open the navigation menu. Under Solutions and Platform, go to Monitoring and click Service Metrics.
  2. For Compartment, select the compartment that contains the volumes you're interested in.

  3. For Metric Namespace, select oci_blockstore.

    The Service Metrics page dynamically updates the page to show charts for each metric that is emitted by the selected metric namespace.

For more information about monitoring metrics and using alarms, see Monitoring Overview. For information about notifications for alarms, see Notifications Overview.