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                    <h1 id="get-dbacpuringbuffer">Get-DbaCpuRingBuffer</h1>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>Author</strong></td>
<td>Patrick Flynn (@sqllensman)</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/Get-DbaCpuRingBuffer.ps1">Get-DbaCpuRingBuffer</a> on GitHub.
<br>
Want to see the Bill Of Health for this command? Check out <a href="https://dataplat.github.io/boh#Get-DbaCpuRingBuffer">Get-DbaCpuRingBuffer</a>.</p>
<h2 id="synopsis">Synopsis</h2>
<p>Collects CPU data from sys.dm_os_ring_buffers.  Works on SQL Server 2005 and above.</p>
<h2 id="description">Description</h2>
<p>This command is based off of Glen Berry's diagnostic query for average CPU</p>
<p>The sys.dm_os_ring_buffers stores the average CPU utilization history<br />
by the current instance of SQL Server, plus the summed average CPU utilization<br />
by all other processes on your machine are captured in one minute increments<br />
for the past 256 minutes.</p>
<p>Reference: <a href="https://www.sqlskills.com/blogs/glenn/sql-server-diagnostic-information-queries-detailed-day-16//">https://www.sqlskills.com/blogs/glenn/sql-server-diagnostic-information-queries-detailed-day-16//</a></p>
<h2 id="syntax">Syntax</h2>
<pre><code>Get-DbaCpuRingBuffer
    [-SqlInstance] &lt;DbaInstanceParameter[]&gt;
    [[-SqlCredential] &lt;PSCredential&gt;]
    [[-CollectionMinutes] &lt;Int32&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; Get-DbaCpuRingBuffer -SqlInstance sql2008, sqlserver2012
</code></pre>
<p>Gets CPU Statistics from sys.dm_os_ring_buffers for servers sql2008 and sqlserver2012 for last 60 minutes.<br></p>
<h5 id="example-2">Example:  2</h5>
<pre><code>PS C:\&gt; Get-DbaCpuRingBuffer -SqlInstance sql2008 -CollectionMinutes 240
</code></pre>
<p>Gets CPU Statistics from sys.dm_os_ring_buffers for server sql2008 for last 240 minutes<br></p>
<h5 id="example-3">Example:  3</h5>
<pre><code>PS C:\&gt; $output = Get-DbaCpuRingBuffer -SqlInstance sql2008 -CollectionMinutes 240 | Select-Object * | ConvertTo-DbaDataTable
</code></pre>
<p>Gets CPU Statistics from sys.dm_os_ring_buffers for server sql2008 for last 240 minutes into a Data Table.<br></p>
<h5 id="example-4">Example:  4</h5>
<pre><code>PS C:\&gt; 'sql2008','sql2012' | Get-DbaCpuRingBuffer
</code></pre>
<p>Gets CPU Statistics from sys.dm_os_ring_buffers for servers sql2008 and sqlserver2012<br></p>
<h5 id="example-5">Example:  5</h5>
<pre><code>PS C:\&gt; $cred = Get-Credential sqladmin
PS C:\&gt; Get-DbaCpuRingBuffer -SqlInstance sql2008 -SqlCredential $cred
</code></pre>
<p>Connects using sqladmin credential and returns CPU Statistics from sys.dm_os_ring_buffers from sql2008<br></p>
<h3 id="required-parameters">Required Parameters</h3>
<h5 id="sqlinstance">-SqlInstance</h5>
<p>Allows you to specify a comma separated list of servers to query. <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. To use:<br />
$cred = Get-Credential, this pass this $cred to the param.<br />
Windows Authentication will be used if DestinationSqlCredential is not specified. To connect as a different Windows user, run PowerShell as that user.<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="collectionminutes">-CollectionMinutes</h5>
<p>Allows you to specify a Collection Period in Minutes. Default is 60 minutes<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>60</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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