In case of Guest OS, What is the main difference between metrics namespace of virtual machine guest and Guest(classic) for windows and in case of linux azure.vm.linux.guest vs Guest(classic).

Question

In case of Guest OS, What is the main difference between metrics namespace of virtual machine guest and Guest(classic) for windows and for Linux azure.vm.linux.guest vs Guest(classic).

we are trying to figure out difference between metrics collected by azure.vm.linux.guest vs Guest(classic) for Linux guest OS. So can you please explain difference between this two.
we are also facing issue with units, description for guest OS metrics. No Units mentioned to metrics in case of azure.vm.linux.guest namespace.

Answer 1

@Abhijit Jirole Welcome to Microsoft Q & A Community Forum. I understand that you are trying to understand the namespaces that are displayed in metrics explorer. Kindly note that there are 3 namespaces which are used by virtual machines as shown below.

Namespace	Description	Requirement
Virtual Machine Host	Host metrics automatically collected for all Azure virtual machines. Detailed list of metrics at Microsoft.Compute/virtualMachines.	Collected automatically with no configuration required.
Guest (classic)	Limited set of guest operating system and application performance data. Available in metrics explorer but not other Azure Monitor features, such as metric alerts.	Diagnostic extension installed. Data is read from Azure Storage.
Virtual Machine Guest	Guest operating system and application performance data available to all Azure Monitor features using metrics.	Azure Monitor agent installed with a Data Collection Rule.

To understand metrics collected by Diagnostic extension i.e., Guest(classic), refer this document for Windows and this document for Linux. For more information, refer this document.