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                    <h1 id="test-dbamaxdop">Test-DbaMaxDop</h1>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>Author</strong></td>
<td>Claudio Silva (@claudioessilva)</td>
</tr>
<tr>
<td><strong>Availability</strong></td>
<td>Windows, Linux, macOS</td>
</tr>
</tbody>
</table>
<p> </p>
<p>Want to see the source code for this command? Check out <a href="https://github.com/dataplat/dbatools/blob/master/public/Test-DbaMaxDop.ps1">Test-DbaMaxDop</a> on GitHub.
<br>
Want to see the Bill Of Health for this command? Check out <a href="https://dataplat.github.io/boh#Test-DbaMaxDop">Test-DbaMaxDop</a>.</p>
<h2 id="synopsis">Synopsis</h2>
<p>Displays information relating to SQL Server Max Degree of Parallelism setting. Works on SQL Server 2005-2016.</p>
<h2 id="description">Description</h2>
<p>Inspired by Sakthivel Chidambaram's post about SQL Server MAXDOP Calculator (<a href="https://blogs.msdn.microsoft.com/sqlsakthi/p/maxdop-calculator/">https://blogs.msdn.microsoft.com/sqlsakthi/p/maxdop-calculator/</a>),<br />
this script displays a SQL Server's: max dop configured, and the calculated recommendation.</p>
<p>For SQL Server 2016 shows:</p>
<ul>
<li>Instance max dop configured and the calculated recommendation</li>
<li>max dop configured per database (new feature)</li>
</ul>
<p>More info:<br />
<a href="https://support.microsoft.com/en-us/kb/2806535">https://support.microsoft.com/en-us/kb/2806535</a><br />
<a href="https://blogs.msdn.microsoft.com/sqlsakthi/2012/05/23/wow-we-have-maxdop-calculator-for-sql-server-it-makes-my-job-easier/">https://blogs.msdn.microsoft.com/sqlsakthi/2012/05/23/wow-we-have-maxdop-calculator-for-sql-server-it-makes-my-job-easier/</a></p>
<p>These are just general recommendations for SQL Server and are a good starting point for setting the &quot;max degree of parallelism&quot; option.</p>
<h2 id="syntax">Syntax</h2>
<pre><code>Test-DbaMaxDop
    [-SqlInstance] &lt;DbaInstanceParameter[]&gt;
    [[-SqlCredential] &lt;PSCredential&gt;]
    [-EnableException]
    [&lt;CommonParameters&gt;]

</code></pre>
<p> </p>
<h2 id="examples">Examples</h2>
<p> </p>
<h5 id="example-1">Example:  1</h5>
<pre><code>PS C:\&gt; Test-DbaMaxDop -SqlInstance sql2008, sqlserver2012
</code></pre>
<p>Get Max DOP setting for servers sql2008 and sqlserver2012 and also the recommended one.<br></p>
<h5 id="example-2">Example:  2</h5>
<pre><code>PS C:\&gt; Test-DbaMaxDop -SqlInstance sql2014 | Select-Object *
</code></pre>
<p>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<br></p>
<h5 id="example-3">Example:  3</h5>
<pre><code>PS C:\&gt; Test-DbaMaxDop -SqlInstance sqlserver2016 | Select-Object *
</code></pre>
<p>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 <br>
instance will be shown 'InstanceVersion', 'Database' and 'DatabaseMaxDop' columns.<br></p>
<h3 id="required-parameters">Required Parameters</h3>
<h5 id="sqlinstance">-SqlInstance</h5>
<p>The target SQL Server instance or instances. <br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>True</td>
</tr>
<tr>
<td>Pipeline</td>
<td>true (ByValue)</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h3 id="optional-parameters">Optional Parameters</h3>
<h5 id="sqlcredential">-SqlCredential</h5>
<p>Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential).<br />
Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported.<br />
For MFA support, please use Connect-DbaInstance.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="enableexception">-EnableException</h5>
<p>By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.<br />
This avoids overwhelming you with &quot;sea of red&quot; exceptions, but is inconvenient because it basically disables advanced scripting.<br />
Using this switch turns this &quot;nice by default&quot; feature off and enables you to catch exceptions with your own try/catch.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>False</td>
</tr>
</tbody>
</table>
<p> </p>

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