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Test-DbaMaxDop
Post
NAME Test-DbaMaxDop
SYNOPSIS
Displays information relating to SQL Server Max Degree of Parallelism setting. Works on SQL Server 2005-2016.
SYNTAX
Test-DbaMaxDop [-SqlInstance] <Sqlcollaborative.Dbatools.Parameter.DbaInstanceParameter[]> [[-SqlCredential]
<Pscredential>] [-EnableException <Switch>] [<CommonParameters>]
DESCRIPTION
Inspired by Sakthivel Chidambaram's post about SQL Server MAXDOP Calculator
(https://blogs.msdn.microsoft.com/sqlsak ... alculator/),
this script displays a SQL Server's: max dop configured, and the calculated recommendation.
For SQL Server 2016 shows:
- Instance max dop configured and the calculated recommendation
- max dop configured per database (new feature)
More info:
https://support.microsoft.com/en-us/kb/2806535
https://blogs.msdn.microsoft.com/sqlsak ... es-my-job-
easier/
These are just general recommendations for SQL Server and are a good starting point for setting the "max degree of
parallelism" option.
PARAMETERS
-EnableException [<Switch>]
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.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
-SqlCredential [<Pscredential>]
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.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
-SqlInstance [<Sqlcollaborative.Dbatools.Parameter.DbaInstanceParameter[]>]
The target SQL Server instance or instances.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
<CommonParameters>
This cmdlet supports the common parameters: Verbose, Debug,
ErrorAction, ErrorVariable, WarningAction, WarningVariable,
OutBuffer, PipelineVariable, and OutVariable. For more information, see
about_CommonParameters (https:/go.microsoft.com/fwlink/?LinkID=113216).
INPUTS
OUTPUTS
System.Collections.ArrayList
NOTES
Tags: MaxDop, SpConfigure
Author: Claudio Silva (@claudioessilva)
Website: https://dbatools.io
Copyright: (c) 2018 by dbatools, licensed under MIT
License: MIT https://opensource.org/licenses/MIT
Requires: sysadmin access on SQL Servers
-------------------------- EXAMPLE 1 --------------------------
PS C:\\>Test-DbaMaxDop -SqlInstance sql2008, sqlserver2012
Get Max DOP setting for servers sql2008 and sqlserver2012 and also the recommended one.
-------------------------- EXAMPLE 2 --------------------------
PS C:\\>Test-DbaMaxDop -SqlInstance sql2014 | Select-Object *
Shows Max DOP setting for server sql2014 with the recommended value. Piping the output to Select-Object * will
also show the 'NumaNodes' and 'NumberOfCores' of each instance
-------------------------- EXAMPLE 3 --------------------------
PS C:\\>Test-DbaMaxDop -SqlInstance sqlserver2016 | Select-Object *
Get Max DOP setting for servers sql2016 with the recommended value. Piping the output to Select-Object * will also
show the 'NumaNodes' and 'NumberOfCores' of each instance. Because it is an 2016 instance will be shown
'InstanceVersion', 'Database' and 'DatabaseMaxDop' columns.
RELATED LINKS
https://dbatools.io/Test-DbaMaxDop
SYNOPSIS
Displays information relating to SQL Server Max Degree of Parallelism setting. Works on SQL Server 2005-2016.
SYNTAX
Test-DbaMaxDop [-SqlInstance] <Sqlcollaborative.Dbatools.Parameter.DbaInstanceParameter[]> [[-SqlCredential]
<Pscredential>] [-EnableException <Switch>] [<CommonParameters>]
DESCRIPTION
Inspired by Sakthivel Chidambaram's post about SQL Server MAXDOP Calculator
(https://blogs.msdn.microsoft.com/sqlsak ... alculator/),
this script displays a SQL Server's: max dop configured, and the calculated recommendation.
For SQL Server 2016 shows:
- Instance max dop configured and the calculated recommendation
- max dop configured per database (new feature)
More info:
https://support.microsoft.com/en-us/kb/2806535
https://blogs.msdn.microsoft.com/sqlsak ... es-my-job-
easier/
These are just general recommendations for SQL Server and are a good starting point for setting the "max degree of
parallelism" option.
PARAMETERS
-EnableException [<Switch>]
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.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
-SqlCredential [<Pscredential>]
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.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
-SqlInstance [<Sqlcollaborative.Dbatools.Parameter.DbaInstanceParameter[]>]
The target SQL Server instance or instances.
Required? false
Position? named
Default value
Accept pipeline input? False
Accept wildcard characters? false
<CommonParameters>
This cmdlet supports the common parameters: Verbose, Debug,
ErrorAction, ErrorVariable, WarningAction, WarningVariable,
OutBuffer, PipelineVariable, and OutVariable. For more information, see
about_CommonParameters (https:/go.microsoft.com/fwlink/?LinkID=113216).
INPUTS
OUTPUTS
System.Collections.ArrayList
NOTES
Tags: MaxDop, SpConfigure
Author: Claudio Silva (@claudioessilva)
Website: https://dbatools.io
Copyright: (c) 2018 by dbatools, licensed under MIT
License: MIT https://opensource.org/licenses/MIT
Requires: sysadmin access on SQL Servers
-------------------------- EXAMPLE 1 --------------------------
PS C:\\>Test-DbaMaxDop -SqlInstance sql2008, sqlserver2012
Get Max DOP setting for servers sql2008 and sqlserver2012 and also the recommended one.
-------------------------- EXAMPLE 2 --------------------------
PS C:\\>Test-DbaMaxDop -SqlInstance sql2014 | Select-Object *
Shows Max DOP setting for server sql2014 with the recommended value. Piping the output to Select-Object * will
also show the 'NumaNodes' and 'NumberOfCores' of each instance
-------------------------- EXAMPLE 3 --------------------------
PS C:\\>Test-DbaMaxDop -SqlInstance sqlserver2016 | Select-Object *
Get Max DOP setting for servers sql2016 with the recommended value. Piping the output to Select-Object * will also
show the 'NumaNodes' and 'NumberOfCores' of each instance. Because it is an 2016 instance will be shown
'InstanceVersion', 'Database' and 'DatabaseMaxDop' columns.
RELATED LINKS
https://dbatools.io/Test-DbaMaxDop