alert_memory_template.json

{
  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "virtualMachineName": {
      "type": "string",
      "metadata": {
        "description": "Name of the Virtual Machine to create the alert for."
      }
    },
    "actionGroupId": {
      "type": "string",
      "metadata": {
        "description": "Resource ID of the action group to assign to this alert."
      }
    }
  },
  "variables": {
    "alertName": "[concat('memory_80_',parameters('virtualMachineName'))]",
    "alertDescription": "Email when memory greater than 80 percent for 5 min",
    "resourceId": "[resourceId('Microsoft.Compute/virtualMachines', parameters('virtualMachineName'))]",
    "alertSeverity": 2,
    "isEnabled": true,
    "metricName": "Memory\\% Committed Bytes In Use",
    "metricNamespace": "Azure.VM.Windows.GuestMetrics",
    "operator": "GreaterThan",
    "threshold": 80,
    "timeAggregation": "Average",
    "windowSize": "PT5M",
    "evaluationFrequency": "PT1M"
  },
  "resources": [
    {
      "name": "[variables('alertName')]",
      "type": "Microsoft.Insights/metricAlerts",
      "location": "global",
      "apiVersion": "2018-03-01",
      "tags": {},
      "properties": {
        "description": "[variables('alertDescription')]",
        "severity": "[variables('alertSeverity')]",
        "enabled": "[variables('isEnabled')]",
        "scopes": [ "[variables('resourceId')]" ],
        "evaluationFrequency": "[variables('evaluationFrequency')]",
        "windowSize": "[variables('windowSize')]",
        "criteria": {
          "odata.type": "Microsoft.Azure.Monitor.SingleResourceMultipleMetricCriteria",
          "allOf": [
            {
              "name": "1st criterion",
              "metricName": "[variables('metricName')]",
              "metricNamespace": "[variables('metricNamespace')]",
              "dimensions": [],
              "operator": "[variables('operator')]",
              "threshold": "[variables('threshold')]",
              "timeAggregation": "[variables('timeAggregation')]"
            }
          ]
        },
        "actions": [
          {
            "actionGroupId": "[parameters('actionGroupId')]"
          }
        ]
      }
    }
  ]
}