I do not know if this has been answered in a previous post as I do not find one.
I am in the process of migrating to the AMA agent and I am reusing the same Log Analytics workspace that was created for the old agent.
When I check the dashboards I see that the data is displaying for CPU. Mem and Disk usage on the VMs.
However when I run the query to check the percent of Disk Space consumed I get no data back regardless of how small a time window I put in or the default available space.
So I am wondering if I need to create a new AMA log analytics workspace or if my query is wrong I started with the sample below just to get the initial free disk space and it returns nothing.
// Virtual Machine free disk space
// Show the latest report of free disk space, per instance.
// To create an alert for this query, click '+ New alert rule'
Perf
| where ObjectName == "LogicalDisk" or // the object name used in Windows records
ObjectName == "Logical Disk" // the object name used in Linux records
| where CounterName == "Free Megabytes"
| summarize arg_max(TimeGenerated, *) by InstanceName // arg_max over TimeGenerated returns the latest record
| project TimeGenerated, InstanceName, CounterValue, Computer, _ResourceId
However if I use the InsightMetrics I get the data.
InsightsMetrics
| where Origin == "vm.azm.ms"
and Namespace == "LogicalDisk" and Name == "FreeSpacePercentage"
| extend Disk=tostring(todynamic(Tags)["vm.azm.ms/mountId"])
| summarize Disk_Free_Space = avg(Val) by Computer, Disk, _ResourceId
| project Computer, Disk, Disk_Free_Space
Is there a document that outlines what parts of the logs tables are the old Log Analytics and what are now under the AMA agents?
