Azure Virtual Machines monitoring data reference
This article contains all the monitoring reference information for this service.
See Monitor Azure Virtual Machines for details on the data you can collect for Azure Virtual Machines and how to use it.
Metrics
This section lists all the automatically collected platform metrics for this service. These metrics are also part of the global list of all platform metrics supported in Azure Monitor.
For information on metric retention, see Azure Monitor Metrics overview.
Important
Metrics for the guest operating system (guest OS) that runs in a virtual machine (VM) aren't listed here. Guest OS metrics must be collected through one or more agents that run on or as part of the guest operating system. Guest OS metrics include performance counters that track guest CPU percentage or memory usage, both of which are frequently used for autoscaling or alerting.
Host OS metrics are available and listed in the following tables. Host OS metrics relate to the Hyper-V session that's hosting your guest OS session. For more information, see Guest OS and host OS metrics.
Supported metrics for Microsoft.Compute/virtualMachines
The following table lists the metrics available for the Microsoft.Compute/virtualMachines resource type.
- All columns might not be present in every table.
- Some columns might be beyond the viewing area of the page. Select Expand table to view all available columns.
Table headings
- Category - The metrics group or classification.
- Metric - The metric display name as it appears in the Azure portal.
- Name in REST API - The metric name as referred to in the REST API.
- Unit - Unit of measure.
- Aggregation - The default aggregation type. Valid values: Average (Avg), Minimum (Min), Maximum (Max), Total (Sum), Count.
- Dimensions - Dimensions available for the metric.
- Time Grains - Intervals at which the metric is sampled. For example,
PT1Mindicates that the metric is sampled every minute,PT30Mevery 30 minutes,PT1Hevery hour, and so on. - DS Export- Whether the metric is exportable to Azure Monitor Logs via diagnostic settings. For information on exporting metrics, see Create diagnostic settings in Azure Monitor.
| Metric | Name in REST API | Unit | Aggregation | Dimensions | Time Grains | DS Export |
|---|---|---|---|---|---|---|
| Available Memory Bytes (Preview) Amount of physical memory, in bytes, immediately available for allocation to a process or for system use in the Virtual Machine |
Available Memory Bytes |
Bytes | Average | <none> | PT1M | Yes |
| CPU Credits Consumed Total number of credits consumed by the Virtual Machine. Only available on B-series burstable VMs |
CPU Credits Consumed |
Count | Average | <none> | PT1M | Yes |
| CPU Credits Remaining Total number of credits available to burst. Only available on B-series burstable VMs |
CPU Credits Remaining |
Count | Average | <none> | PT1M | Yes |
| Data Disk Bandwidth Consumed Percentage Percentage of data disk bandwidth consumed per minute. Only available on VM series that support premium storage. |
Data Disk Bandwidth Consumed Percentage |
Percent | Average | LUN |
PT1M | Yes |
| Data Disk IOPS Consumed Percentage Percentage of data disk I/Os consumed per minute. Only available on VM series that support premium storage. |
Data Disk IOPS Consumed Percentage |
Percent | Average | LUN |
PT1M | Yes |
| Data Disk Latency (Preview) Average time to complete each IO during monitoring period for Data Disk. Values are in milliseconds. |
Data Disk Latency |
Milliseconds | Average | LUN |
PT1M | Yes |
| Data Disk Max Burst Bandwidth Maximum bytes per second throughput Data Disk can achieve with bursting |
Data Disk Max Burst Bandwidth |
Count | Average | LUN |
PT1M | Yes |
| Data Disk Max Burst IOPS Maximum IOPS Data Disk can achieve with bursting |
Data Disk Max Burst IOPS |
Count | Average | LUN |
PT1M | Yes |
| Data Disk Queue Depth Data Disk Queue Depth(or Queue Length) |
Data Disk Queue Depth |
Count | Average | LUN |
PT1M | Yes |
| Data Disk Read Bytes/Sec Bytes/Sec read from a single disk during monitoring period |
Data Disk Read Bytes/sec |
BytesPerSecond | Average | LUN |
PT1M | Yes |
| Data Disk Read Operations/Sec Read IOPS from a single disk during monitoring period |
Data Disk Read Operations/Sec |
CountPerSecond | Average | LUN |
PT1M | Yes |
| Data Disk Target Bandwidth Baseline bytes per second throughput Data Disk can achieve without bursting |
Data Disk Target Bandwidth |
Count | Average | LUN |
PT1M | Yes |
| Data Disk Target IOPS Baseline IOPS Data Disk can achieve without bursting |
Data Disk Target IOPS |
Count | Average | LUN |
PT1M | Yes |
| Data Disk Used Burst BPS Credits Percentage Percentage of Data Disk burst bandwidth credits used so far |
Data Disk Used Burst BPS Credits Percentage |
Percent | Average | LUN |
PT1M | Yes |
| Data Disk Used Burst IO Credits Percentage Percentage of Data Disk burst I/O credits used so far |
Data Disk Used Burst IO Credits Percentage |
Percent | Average | LUN |
PT1M | Yes |
| Data Disk Write Bytes/Sec Bytes/Sec written to a single disk during monitoring period |
Data Disk Write Bytes/sec |
BytesPerSecond | Average | LUN |
PT1M | Yes |
| Data Disk Write Operations/Sec Write IOPS from a single disk during monitoring period |
Data Disk Write Operations/Sec |
CountPerSecond | Average | LUN |
PT1M | Yes |
| Disk Read Bytes Bytes read from disk during monitoring period |
Disk Read Bytes |
Bytes | Total (Sum) | <none> | PT1M | Yes |
| Disk Read Operations/Sec Disk Read IOPS |
Disk Read Operations/Sec |
CountPerSecond | Average | <none> | PT1M | Yes |
| Disk Write Bytes Bytes written to disk during monitoring period |
Disk Write Bytes |
Bytes | Total (Sum) | <none> | PT1M | Yes |
| Disk Write Operations/Sec Disk Write IOPS |
Disk Write Operations/Sec |
CountPerSecond | Average | <none> | PT1M | Yes |
| Inbound Flows Inbound Flows are number of current flows in the inbound direction (traffic going into the VM) |
Inbound Flows |
Count | Average | <none> | PT1M | Yes |
| Inbound Flows Maximum Creation Rate The maximum creation rate of inbound flows (traffic going into the VM) |
Inbound Flows Maximum Creation Rate |
CountPerSecond | Average | <none> | PT1M | Yes |
| Network In Billable (Deprecated) The number of billable bytes received on all network interfaces by the Virtual Machine(s) (Incoming Traffic) (Deprecated) |
Network In |
Bytes | Total (Sum) | <none> | PT1M | Yes |
| Network In Total The number of bytes received on all network interfaces by the Virtual Machine(s) (Incoming Traffic) |
Network In Total |
Bytes | Total (Sum) | <none> | PT1M | Yes |
| Network Out Billable (Deprecated) The number of billable bytes out on all network interfaces by the Virtual Machine(s) (Outgoing Traffic) (Deprecated) |
Network Out |
Bytes | Total (Sum) | <none> | PT1M | Yes |
| Network Out Total The number of bytes out on all network interfaces by the Virtual Machine(s) (Outgoing Traffic) |
Network Out Total |
Bytes | Total (Sum) | <none> | PT1M | Yes |
| OS Disk Bandwidth Consumed Percentage Percentage of operating system disk bandwidth consumed per minute. Only available on VM series that support premium storage. |
OS Disk Bandwidth Consumed Percentage |
Percent | Average | LUN |
PT1M | Yes |
| OS Disk IOPS Consumed Percentage Percentage of operating system disk I/Os consumed per minute. Only available on VM series that support premium storage. |
OS Disk IOPS Consumed Percentage |
Percent | Average | LUN |
PT1M | Yes |
| OS Disk Latency (Preview) Average time to complete each IO during monitoring period for OS Disk. Values are in milliseconds. |
OS Disk Latency |
Milliseconds | Average | <none> | PT1M | Yes |
| OS Disk Max Burst Bandwidth Maximum bytes per second throughput OS Disk can achieve with bursting |
OS Disk Max Burst Bandwidth |
Count | Average | LUN |
PT1M | Yes |
| OS Disk Max Burst IOPS Maximum IOPS OS Disk can achieve with bursting |
OS Disk Max Burst IOPS |
Count | Average | LUN |
PT1M | Yes |
| OS Disk Queue Depth OS Disk Queue Depth(or Queue Length) |
OS Disk Queue Depth |
Count | Average | <none> | PT1M | Yes |
| OS Disk Read Bytes/Sec Bytes/Sec read from a single disk during monitoring period for OS disk |
OS Disk Read Bytes/sec |
BytesPerSecond | Average | <none> | PT1M | Yes |
| OS Disk Read Operations/Sec Read IOPS from a single disk during monitoring period for OS disk |
OS Disk Read Operations/Sec |
CountPerSecond | Average | <none> | PT1M | Yes |
| OS Disk Target Bandwidth Baseline bytes per second throughput OS Disk can achieve without bursting |
OS Disk Target Bandwidth |
Count | Average | LUN |
PT1M | Yes |
| OS Disk Target IOPS Baseline IOPS OS Disk can achieve without bursting |
OS Disk Target IOPS |
Count | Average | LUN |
PT1M | Yes |
| OS Disk Used Burst BPS Credits Percentage Percentage of OS Disk burst bandwidth credits used so far |
OS Disk Used Burst BPS Credits Percentage |
Percent | Average | LUN |
PT1M | Yes |
| OS Disk Used Burst IO Credits Percentage Percentage of OS Disk burst I/O credits used so far |
OS Disk Used Burst IO Credits Percentage |
Percent | Average | LUN |
PT1M | Yes |
| OS Disk Write Bytes/Sec Bytes/Sec written to a single disk during monitoring period for OS disk |
OS Disk Write Bytes/sec |
BytesPerSecond | Average | <none> | PT1M | Yes |
| OS Disk Write Operations/Sec Write IOPS from a single disk during monitoring period for OS disk |
OS Disk Write Operations/Sec |
CountPerSecond | Average | <none> | PT1M | Yes |
| Outbound Flows Outbound Flows are number of current flows in the outbound direction (traffic going out of the VM) |
Outbound Flows |
Count | Average | <none> | PT1M | Yes |
| Outbound Flows Maximum Creation Rate The maximum creation rate of outbound flows (traffic going out of the VM) |
Outbound Flows Maximum Creation Rate |
CountPerSecond | Average | <none> | PT1M | Yes |
| Percentage CPU The percentage of allocated compute units that are currently in use by the Virtual Machine(s) |
Percentage CPU |
Percent | Average | <none> | PT1M | Yes |
| Premium Data Disk Cache Read Hit Premium Data Disk Cache Read Hit |
Premium Data Disk Cache Read Hit |
Percent | Average | LUN |
PT1M | Yes |
| Premium Data Disk Cache Read Miss Premium Data Disk Cache Read Miss |
Premium Data Disk Cache Read Miss |
Percent | Average | LUN |
PT1M | Yes |
| Premium OS Disk Cache Read Hit Premium OS Disk Cache Read Hit |
Premium OS Disk Cache Read Hit |
Percent | Average | <none> | PT1M | Yes |
| Premium OS Disk Cache Read Miss Premium OS Disk Cache Read Miss |
Premium OS Disk Cache Read Miss |
Percent | Average | <none> | PT1M | Yes |
| Temp Disk Latency (Preview) Average time to complete each IO during monitoring period for Temp Disk. Values are in milliseconds. |
Temp Disk Latency |
Milliseconds | Average | <none> | PT1M | Yes |
| Temp Disk Queue Depth Temp Disk Queue Depth(or Queue Length). |
Temp Disk Queue Depth |
Count | Average | <none> | PT1M | Yes |
| Temp Disk Read Bytes/Sec Bytes/Sec read from a single disk during monitoring period for Temp Disk. |
Temp Disk Read Bytes/sec |
BytesPerSecond | Average | <none> | PT1M | Yes |
| Temp Disk Read Operations/Sec Read IOPS from a single disk during monitoring period for Temp Disk. |
Temp Disk Read Operations/Sec |
CountPerSecond | Average | <none> | PT1M | Yes |
| Temp Disk Write Bytes/Sec Bytes/Sec written to a single disk during monitoring period for Temp Disk. |
Temp Disk Write Bytes/sec |
BytesPerSecond | Average | <none> | PT1M | Yes |
| Temp Disk Write Operations/Sec Write IOPS from a single disk during monitoring period for Temp Disk. |
Temp Disk Write Operations/Sec |
CountPerSecond | Average | <none> | PT1M | Yes |
| VM Cached Bandwidth Consumed Percentage Percentage of cached disk bandwidth consumed by the VM. Only available on VM series that support premium storage. |
VM Cached Bandwidth Consumed Percentage |
Percent | Average | <none> | PT1M | Yes |
| VM Cached IOPS Consumed Percentage Percentage of cached disk IOPS consumed by the VM. Only available on VM series that support premium storage. |
VM Cached IOPS Consumed Percentage |
Percent | Average | <none> | PT1M | Yes |
| VM Cached Used Burst BPS Credits Percentage Percentage of Cached Burst BPS Credits used by the VM. |
VM Local Used Burst BPS Credits Percentage |
Percent | Average, Minimum, Maximum | <none> | PT1M | Yes |
| VM Cached Used Burst IO Credits Percentage Percentage of Cached Burst IO Credits used by the VM. |
VM Local Used Burst IO Credits Percentage |
Percent | Average, Minimum, Maximum | <none> | PT1M | Yes |
| VM Uncached Used Burst BPS Credits Percentage Percentage of Uncached Burst BPS Credits used by the VM. |
VM Remote Used Burst BPS Credits Percentage |
Percent | Average, Minimum, Maximum | <none> | PT1M | Yes |
| VM Uncached Used Burst IO Credits Percentage Percentage of Uncached Burst IO Credits used by the VM. |
VM Remote Used Burst IO Credits Percentage |
Percent | Average, Minimum, Maximum | <none> | PT1M | Yes |
| VM Uncached Bandwidth Consumed Percentage Percentage of uncached disk bandwidth consumed by the VM. Only available on VM series that support premium storage. |
VM Uncached Bandwidth Consumed Percentage |
Percent | Average | <none> | PT1M | Yes |
| VM Uncached IOPS Consumed Percentage Percentage of uncached disk IOPS consumed by the VM. Only available on VM series that support premium storage. |
VM Uncached IOPS Consumed Percentage |
Percent | Average | <none> | PT1M | Yes |
| VM Availability Metric (Preview) Measure of Availability of Virtual machines over time. |
VmAvailabilityMetric |
Count | Average, Minimum, Maximum | Context |
PT1M | Yes |
For an example that shows how to collect the Percentage CPU metric from a VM, see Get virtual machine usage metrics using the REST API.
VM availability metric (preview)
The VM availability metric is currently in public preview. This metric value indicates whether a machine is currently running and available. You can use the metric to trend availability over time and to alert if the machine is stopped. VM availability displays the following values.
To learn how to use the VM availability metric to monitor Azure Virtual Machine availability, see Use Azure Monitor to monitor Azure Virtual Machine availability.
| Value | Description |
|---|---|
| 1 | VM is running and available. |
| 0 | VM is unavailable. The VM could be stopped or rebooting. If you shut down a VM from within the VM, it emits this value. |
| Null (dashed line) | State of the VM is unknown. If you stop a VM from the Azure portal, CLI, or PowerShell, it immediately stops emitting the availability metric, and you see null values. |
Context dimension informs whether VM availability was influenced due to Azure or user orchestrated activity. It can assume values of Platform, Customer, or Unknown.
| Display name | Description |
|---|---|
| Aggregation | Average (default aggregation): for prioritized investigations based on extent of downtime incurred. Min: immediately pinpoints all the times where the VM was unavailable. Max: immediately pinpoints all the instances where the VM was available. For more information on chart range, granularity, and data aggregation, see Azure Monitor metrics aggregation and display explained. |
| Data retention | Data for the VM availability metric is stored for 93 days to help trend analysis and historical lookback. |
| Pricing | Refer to the Pricing breakdown, specifically in the Metrics and Alert Rules sections. |
Metric dimensions
For information about what metric dimensions are, see Multi-dimensional metrics.
The dimension Logical Unit Number (LUN) is associated with some of the preceding metrics.
Azure Monitor Logs tables
This section lists the Azure Monitor Logs tables relevant to this service, which are available for query by Log Analytics using Kusto queries. The tables contain resource log data and possibly more depending on what is collected and routed to them.
| Table | Categories | Data collection method | Supports basic log plan | Queries |
|---|---|---|---|---|
| ADAssessmentRecommendation Recommendations generated by AD assessments that are started through a scheduled task. When you schedule the assessment it runs by default every seven days and uploads the data into Azure Log Analytics. |
workloads | Active Directory On-Demand Assessment | No | Yes |
| AzureActivity Entries from the Azure Activity log that provides insight into any subscription-level or management group level events that have occurred in Azure. |
resources, audit, security | Export Activity log | No | Yes |
| CommonSecurityLog This table is for collecting events in the Common Event Format, that are most often sent from different security appliances such as Check Point, Palo Alto and more. |
security | Common Event Format (CEF) via AMA connector for Microsoft Sentinel | No | Yes |
| ConfigurationChange View changes to in-guest configuration data such as Files Software Registry Keys Windows Services and Linux Daemons |
management | Enable Change Tracking and Inventory | No | Yes |
| ConfigurationData View the last reported state for in-guest configuration data such as Files Software Registry Keys Windows Services and Linux Daemons |
management | Enable Change Tracking and Inventory | No | Yes |
| ContainerLog Log lines collected from stdout and stderr streams for containers. |
container, applications | Container Insights | No | Yes |
| DnsEvents | network | Stream and filter data from Windows DNS servers with Azure Monitor Agent | No | Yes |
| DnsInventory | network | Stream and filter data from Windows DNS servers with Azure Monitor Agent | No | - |
| Event Events from Windows Event Log on Windows computers using Azure Monitor Agent Analytics agent. |
virtualmachines | Collect events with Azure Monitor Agent | No | Yes |
| HealthStateChangeEvent Workload Monitor Health. This data represents state transitions of a health monitor. |
undefined | VM Insights | No | - |
| Heartbeat Records logged by Azure Monitor Agent once per minute to report on agent health. |
virtualmachines, container, management | Azure Monitor Agent | No | Yes |
| InsightsMetrics Table that stores metrics. 'Perf' table also stores many metrics and over time they all will converge to InsightsMetrics. |
virtualmachines, container, resources | VM Insights, Container Insights | No | Yes |
| Perf Performance counters from Windows and Linux agents that provide insight into the performance of hardware components operating systems and applications. |
virtualmachines, container | Collect performance counters from VMs with Azure Monitor Agent | No | Yes |
| ProtectionStatus Antimalware installation info and security health status of the machine: |
security | Enable Azure Monitor Agent in Defender for Cloud | No | Yes |
| SQLAssessmentRecommendation Recommendations generated by SQL assessments that are started through a scheduled task. When you schedule the assessment it runs by default every seven days and uploads the data into Azure Log Analytics. |
workloads | SQL Server On-Demand Assessment | No | Yes |
| SecurityBaseline | security | Enable Azure Monitor Agent in Defender for Cloud | No | - |
| SecurityBaselineSummary | security | Enable Azure Monitor Agent in Defender for Cloud | No | - |
| SecurityEvent Security events collected from windows machines by Azure Security Center or Azure Sentinel. |
security | Windows Security Events via AMA connector for Microsoft Sentinel | No | Yes |
| Syslog Syslog events on Linux computers using Azure Monitor Agent. |
virtualmachines, security | Collect Syslog events with Azure Monitor Agent | No | Yes |
| Update Details for update schedule run. Includes information such as which updates where available and which were installed. |
management, security | Enable Update Management | No | Yes |
| UpdateRunProgress Breaks down each run of your update schedule by the patches available at the time with details on the installation status of each patch. |
management | Enable Update Management | No | Yes |
| UpdateSummary Summary for each update schedule run. Includes information such as how many updates weren't installed. |
virtualmachines | Enable Update Management | No | Yes |
| VMBoundPort Traffic for open server ports on the monitored machine. |
virtualmachines | VM Insights | No | - |
| VMComputer Inventory data for servers collected by the Service Map and VM insights solutions using the Dependency agent and Azure Monitor Agent. |
virtualmachines | VM Insights | No | - |
| VMConnection Traffic for inbound and outbound connections to and from monitored computers. |
virtualmachines | VM Insights | No | - |
| VMProcess Process data for servers collected by the Service Map and VM insights solutions using the Dependency agent and Azure Monitor Agent. |
virtualmachines | VM Insights | No | - |
| W3CIISLog Internet Information Server (IIS) log on Windows computers using Azure Monitor Agent. |
management, virtualmachines | Collect IIS logs with Azure Monitor Agent | No | Yes |
| WindowsFirewall | security | Enable Azure Monitor Agent in Defender for Cloud | No | - |
Activity log
The linked table lists the operations that can be recorded in the activity log for this service. These operations are a subset of all the possible resource provider operations in the activity log.
For more information on the schema of activity log entries, see Activity Log schema.
The following table lists a few example operations that relate to creating VMs in the activity log. For a complete list of operations, see Microsoft.Compute resource provider operations.
| Operation | Description |
|---|---|
| Microsoft.Compute/virtualMachines/start/action | Starts the virtual machine |
| Microsoft.Compute/virtualMachines/restart/action | Deletes a managed cluster |
| Microsoft.Compute/virtualMachines/write | Creates a new virtual machine or updates an existing one |
| Microsoft.Compute/virtualMachines/deallocate/action | Powers off the virtual machine and releases the compute resources |
| Microsoft.Compute/virtualMachines/extensions/write | Creates a new virtual machine extension or updates an existing one |
| Microsoft.Compute/virtualMachineScaleSets/write | Starts the instances of the virtual machine scale set |
Related content
- See Monitor Virtual Machines for a description of monitoring Virtual Machines.
- See Monitor Azure resources with Azure Monitor for details on monitoring Azure resources.