Use PowerShell to monitor and scale an elastic pool in Azure SQL Database

This PowerShell script example monitors the performance metrics of an elastic pool, scales it to a higher compute size, and creates an alert rule on one of the performance metrics.

If you don't have an Azure subscription, create a free account before you begin.

Note

This article has been updated to use the new Azure PowerShell Az module. You can still use the AzureRM module, which will continue to receive bug fixes until at least December 2020. To learn more about the new Az module and AzureRM compatibility, see Introducing the new Azure PowerShell Az module. For Az module installation instructions, see Install Azure PowerShell.

Launch Azure Cloud Shell

The Azure Cloud Shell is a free interactive shell that you can use to run the steps in this article. It has common Azure tools preinstalled and configured to use with your account. Just click the Copy to copy the code, paste it into the Cloud Shell, and then press enter to run it. There are a few ways to launch the Cloud Shell:

Click Try It in the upper right corner of a code block. Cloud Shell in this article
Open Cloud Shell in your browser. https://shell.azure.com/powershell
Click the Cloud Shell button on the menu in the upper right of the Azure portal. Cloud Shell in the portal

If you choose to install and use the PowerShell locally, this tutorial requires AZ PowerShell 1.4.0 or later. If you need to upgrade, see Install Azure PowerShell module. If you are running PowerShell locally, you also need to run Connect-AzAccount to create a connection with Azure.

Sample script

# Connect-AzAccount
$SubscriptionId = ''
# Set the resource group name and location for your server
$resourceGroupName = "myResourceGroup-$(Get-Random)"
$location = "westus2"
# Set elastic pool names
$poolName = "MySamplePool"
# Set an admin login and password for your database
$adminSqlLogin = "SqlAdmin"
$password = "ChangeYourAdminPassword1"
# The logical server name has to be unique in the system
$serverName = "server-$(Get-Random)"
# The sample database names
$firstDatabaseName = "myFirstSampleDatabase"
$secondDatabaseName = "mySecondSampleDatabase"
# The ip address range that you want to allow to access your server
$startIp = "0.0.0.0"
$endIp = "0.0.0.0"

# Set subscription 
Set-AzContext -SubscriptionId $subscriptionId 

# Create a new resource group
$resourceGroup = New-AzResourceGroup -Name $resourceGroupName -Location $location

# Create a new server with a system wide unique server name
$server = New-AzSqlServer -ResourceGroupName $resourceGroupName `
    -ServerName $serverName `
    -Location $location `
    -SqlAdministratorCredentials $(New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $adminSqlLogin, $(ConvertTo-SecureString -String $password -AsPlainText -Force))

# Create elastic database pool
$elasticPool = New-AzSqlElasticPool -ResourceGroupName $resourceGroupName `
    -ServerName $serverName `
    -ElasticPoolName $poolName `
    -Edition "Standard" `
    -Dtu 50 `
    -DatabaseDtuMin 10 `
    -DatabaseDtuMax 50

# Create a server firewall rule that allows access from the specified IP range
$serverFirewallRule = New-AzSqlServerFirewallRule -ResourceGroupName $resourceGroupName `
    -ServerName $serverName `
    -FirewallRuleName "AllowedIPs" -StartIpAddress $startIp -EndIpAddress $endIp

# Create two blank database in the pool
$firstDatabase = New-AzSqlDatabase  -ResourceGroupName $resourceGroupName `
    -ServerName $serverName `
    -DatabaseName $firstDatabaseName `
    -ElasticPoolName $poolName
$secondDatabase = New-AzSqlDatabase  -ResourceGroupName $resourceGroupName `
    -ServerName $serverName `
    -DatabaseName $secondDatabaseName `
    -ElasticPoolName $poolName

# Monitor the pool
$monitorparameters = @{
  ResourceId = "/subscriptions/$($(Get-AzContext).Subscription.Id)/resourceGroups/$resourceGroupName/providers/Microsoft.Sql/servers/$serverName/elasticPools/$poolName"
  TimeGrain = [TimeSpan]::Parse("00:05:00")
  MetricNames = "dtu_consumption_percent"
}
(Get-AzMetric @monitorparameters -DetailedOutput).MetricValues

# Scale the pool
$elasticPool = Set-AzSqlElasticPool -ResourceGroupName $resourceGroupName `
    -ServerName $serverName `
    -ElasticPoolName $poolName `
    -Edition "Standard" `
    -Dtu 100 `
    -DatabaseDtuMin 20 `
    -DatabaseDtuMax 100

# Add an alert that fires when the pool utilization reaches 90%
Add-AzMetricAlertRule -ResourceGroup $resourceGroupName `
    -Name "mySampleAlertRule" `
    -Location $location `
    -TargetResourceId "/subscriptions/$($(Get-AzContext).Subscription.Id)/resourceGroups/$resourceGroupName/providers/Microsoft.Sql/servers/$serverName/elasticPools/$poolName" `
    -MetricName "dtu_consumption_percent" `
    -Operator "GreaterThan" `
    -Threshold 90 `
    -WindowSize $([TimeSpan]::Parse("00:05:00")) `
    -TimeAggregationOperator "Average" `
    -Action $(New-AzAlertRuleEmail -SendToServiceOwner)

# Clean up deployment 
# Remove-AzResourceGroup -ResourceGroupName $resourceGroupName

Clean up deployment

Use the following command to remove the resource group and all resources associated with it.

Remove-AzResourceGroup -ResourceGroupName $resourcegroupname

Script explanation

This script uses the following commands. Each command in the table links to command specific documentation.

Command Notes
New-AzResourceGroup Creates a resource group in which all resources are stored.
New-AzSqlServer Creates a SQL Database server that hosts a single database or elastic pool.
New-AzSqlElasticPool Creates an elastic pool.
New-AzSqlDatabase Creates a single database or database in an elastic pool.
Get-AzMetric Shows the size usage information for the database.
Add-AzMetricAlertRule Adds or updates a metric-based alert rule.
Set-AzSqlElasticPool Updates elastic pool properties
Add-AzMetricAlertRule Sets an alert rule to automatically monitor DTUs in the future.
Remove-AzResourceGroup Deletes a resource group including all nested resources.

Next steps

For more information on the Azure PowerShell, see Azure PowerShell documentation.

Additional SQL Database PowerShell script samples can be found in the Azure SQL Database PowerShell scripts.