Monitor a VM Cluster

You can monitor the health, capacity, and performance of a VM Cluster by using metrics, alarms, and notifications. Oracle Base Database Cloud@Customer publishes metrics to the Monitoring service, where you can view them by using the Console, the Monitoring API, or other supported tools.

Before you begin, review the following:

• Viewing metrics requires the appropriate IAM permissions. For more information, see Getting Started with Policies.
• By default, the Console displays metrics for the previous hour.
• Up to one hour of metric data might be unavailable after network connectivity is restored before metric collection resumes.

View metrics

Perform the following steps in the Console.

1. On the Data Infrastructures list page, select the Data Infrastructure that you want to work with. If you need help finding the list page or the Data Infrastructure, see List Data Infrastructures.

2. On the Data Infrastructure details page, select the VM Clusters tab to view the list of all VM Clusters.

3. On the VM Clusters tab, select the VM Cluster that you want to work with.

4. On the VM Clusters details page, select the Metrics tab.

   A chart for each metric is displayed. By default, the metrics for the last hour are displayed.

Metric filters

Use filters to select the resource and time range for which you want to view the metrics.

Filter by date

Optionally, use the Date filter to constrain results to a specific start and end time (in UTC) or to select a predefined range.

1. Next to Applied filters, select Date.

2. Specify a custom time range by providing the following values:

   • Start date(Required): Select the start date for the time range.
   • Start time(Required): Enter the start time (UTC).
   • End date(Required): Select the end date for the time range.
   • End time(Required): Enter the end time (UTC).

   • Or, select a preset range:

     • Last hour
     • Last 6 hours
     • Last 12 hours
     • Last 24 hours
     • Last 7 days
     • Last 30 days
     • Last 90 days
3. Select Apply filter to refresh the results.

Metric charts

A separate chart is displayed for each metric. By default, charts show data for the last hour.

Change the interval and statistic

For each metric, you can set the Interval and Statistic independently, and then apply your changes.

1. For a metric chart, select the Interval and Statistic values.
2. Select Apply filter.

Interval

The time period used to calculate the metric data points. The default is Auto. Available intervals are: Auto, 1 minute, 5 minutes, 1 hour, 1 day.

Statistic

The aggregation method used to calculate the metric. The default is Mean. Available statistics are: Rate, Sum, Mean, Min, Max, Count, P50, P90, P95, P99, P99.9.

Metric Actions menu options

For each metric chart, you can select the following options from the Actions menu:

• Hide Legend
• View query in Metrics Explorer
• Copy chart URL
• Copy query (MQL)
• Create an alarm on this query
• Table view

Metrics emitted by the VM Cluster

This section describes the metrics emitted by the VM Cluster in the oci_database_cluster namespace.

The metrics in this section use the following dimensions.

• resourceId: The OCID of the Data Infrastructure.
• resourceName: The name of the VM Cluster.
• vmId: The id of the VM.
• clusterId: The id of the VM Cluster.

The following metrics are automatically available for the VM Cluster. In addition to the metrics documented here, Oracle may analyze other operational metrics to support service operations and help maintain high availability.

Metric Display Name	Metric Name	Unit	Description	Dimensions
CPU Utilization	CpuUtilization	Percentage	Percent CPU utilization.	deploymentType, diskgroupName
ASM Diskgroup Utilization	ASMDiskgroupUtilization	Percentage	Percentage of usable space used in a Disk Group. Usable space is the space available for growth. DATA disk group stores our Oracle AI Database files. RECO disk group contains database files for recovery such as archives and flashback logs.	hostname, deploymentType, resourceId_dbnode, resourceName_dbnode
Memory Utilization	MemoryUtilization	Percentage	Percentage of memory available for starting new applications, without swapping. The available memory can be obtained via the following command: cat /proc/meminfo	hostname, deploymentType, resourceId_dbnode, resourceName_dbnode
Swap Utilization	SwapUtilization	Percentage	Percent utilization of total swap space.	hostname, deploymentType, resourceId_dbnode, resourceName_dbnode
Load Average	LoadAverage	Number	System load average over 5 minutes.	hostname, deploymentType, resourceId_dbnode, resourceName_dbnode
Node Status	NodeStatus	Integer	Indicates whether the host is reachable.	hostname, deploymentType, resourceId_dbnode, resourceName_dbnode