commands

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Test-DbaDbQueryStore

Author Jess Pomfret (@jpomfret), jesspomfret.com
Availability Windows, Linux, macOS

 

Synopsis

Compares Query Store settings against best practices.

Description

Evaluates Query Store against a set of rules to match best practices. The rules are:

  • ActualState = ReadWrite (This means Query Store is enabled and collecting data.)
  • DataFlushIntervalInSeconds = 900 (Recommended to leave this at the default of 900 seconds (15 mins).)
  • MaxPlansPerQuery = 200 (Number of distinct plans per query. 200 is a good starting point for most environments.)
  • MaxStorageSizeInMB = 2048 (How much disk space Query Store will use. 2GB is a good starting point.)
  • QueryCaptureMode = Auto (With auto, queries that are insignificant from a resource utilization perspective, or executed infrequently, are not captured.)
  • SizeBasedCleanupMode = Auto (With auto, as Query Store gets close to out of space it will automatically purge older data.)
  • StaleQueryThresholdInDays = 30 (Determines how much historic data to keep. 30 days is a good value here.)
  • StatisticsCollectionIntervalInMinutes = 30 (Time window that runtime stats will be aggregated. Use 30 unless you have space concerns, then leave at the default (60).)
  • WaitStatsCaptureMode = ON (Adds valuable data when troubleshooting.)
  • Trace Flag 7745 enabled
  • Trace Flag 7752 enabled

Syntax

Test-DbaDbQueryStore
    [[-SqlInstance] <DbaInstanceParameter[]>]
    [[-SqlCredential] <PSCredential>]
    [[-Database] <Object[]>]
    [[-ExcludeDatabase] <Object[]>]
    [[-InputObject] <Object[]>]
    [-EnableException]
    [<CommonParameters>]

 

Examples

 

Example: 1
PS C:\> Test-DbaDbQueryStore -SqlInstance localhost

Checks that Query Store is enabled and meets best practices for all user databases on the localhost machine.

Example: 2
PS C:\> Test-DbaDbQueryStore -SqlInstance localhost -Database AdventureWorks2017

Checks that Query Store is enabled and meets best practices for the AdventureWorks2017 database on the localhost machine.

Example: 3
PS C:\> Test-DbaDbQueryStore -SqlInstance localhost -ExcludeDatabase AdventureWorks2017

Checks that Query Store is enabled and meets best practices for all user databases except AdventureWorks2017 on the localhost machine.

Example: 4
PS C:\> $databases = Get-DbaDatabase -SqlInstance localhost
PS C:\> $databases | Test-DbaDbQueryStore

Checks that Query Store is enabled and meets best practices for all databases that are piped on the localhost machine.

Optional Parameters

-SqlInstance

The target SQL Server instance or instances.

Alias
Required False
Pipeline false
Default Value
-SqlCredential

Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential). Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported. For MFA support, please use Connect-DbaInstance.

Alias
Required False
Pipeline false
Default Value
-Database

The database(s) to process. This list is auto-populated from the server. If unspecified, all user databases will be processed.

Alias
Required False
Pipeline false
Default Value
-ExcludeDatabase

The database(s) to exclude. This list is auto-populated from the server.

Alias
Required False
Pipeline false
Default Value
-InputObject

Enables piped input from Get-DbaDatabase.

Alias
Required False
Pipeline true (ByValue)
Default Value
-EnableException

By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message. This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting. Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.

Alias
Required False
Pipeline false
Default Value False

 

Want to see the source code for this command? Check out Test-DbaDbQueryStore on GitHub.
Want to see the Bill Of Health for this command? Check out Test-DbaDbQueryStore.