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                    <h1 id="invoke-dbadbccfreecache">Invoke-DbaDbccFreeCache</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/Invoke-DbaDbccFreeCache.ps1">Invoke-DbaDbccFreeCache</a> on GitHub.
<br>
Want to see the Bill Of Health for this command? Check out <a href="https://dataplat.github.io/boh#Invoke-DbaDbccFreeCache">Invoke-DbaDbccFreeCache</a>.</p>
<h2 id="synopsis">Synopsis</h2>
<p>Execution of Database Console Commands that clear Server level Memory caches</p>
<h2 id="description">Description</h2>
<p>Allows execution of Database Console Commands that act at Server Level to clear Memory caches</p>
<p>Allows execution of the following commands<br />
DBCC FREEPROCCACHE<br />
DBCC FREESESSIONCACHE<br />
DBCC FREESYSTEMCACHE</p>
<p>Read more:<br />
- <a href="https://docs.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-freeproccache-transact-sql">https://docs.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-freeproccache-transact-sql</a><br />
- <a href="https://docs.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-freesessioncache-transact-sql">https://docs.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-freesessioncache-transact-sql</a><br />
- <a href="https://docs.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-freesystemcache-transact-sql">https://docs.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-freesystemcache-transact-sql</a></p>
<h2 id="syntax">Syntax</h2>
<pre><code>Invoke-DbaDbccFreeCache
    [-SqlInstance] &lt;DbaInstanceParameter[]&gt;
    [[-SqlCredential] &lt;PSCredential&gt;]
    [[-Operation] &lt;String&gt;]
    [[-InputValue] &lt;String&gt;]
    [-NoInformationalMessages]
    [-MarkInUseForRemoval]
    [-EnableException]
    [-WhatIf]
    [-Confirm]
    [&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; Invoke-DbaDbccFreeCache -SqlInstance SqlServer2017 -Operation FREEPROCCACHE
</code></pre>
<p>Runs the command DBCC FREEPROCCACHE against the instance SqlServer2017 using Windows Authentication<br></p>
<h5 id="example-2">Example:  2</h5>
<pre><code>PS C:\&gt; Invoke-DbaDbccFreeCache -SqlInstance SqlServer2017 -Operation FREESESSIONCACHE -NoInformationalMessages
</code></pre>
<p>Runs the command DBCC FREESESSIONCACHE WITH NO_INFOMSGS against the instance SqlServer2017 using Windows Authentication<br></p>
<h5 id="example-3">Example:  3</h5>
<pre><code>PS C:\&gt; Invoke-DbaDbccFreeCache -SqlInstance SqlServer2017 -Operation FREESYSTEMCACHE -NoInformationalMessages
</code></pre>
<p>Runs the command DBCC FREESYSTEMCACHE WITH NO_INFOMSGS against the instance SqlServer2017 using Windows Authentication<br></p>
<h5 id="example-4">Example:  4</h5>
<pre><code>PS C:\&gt; Invoke-DbaDbccFreeCache -SqlInstance SqlServer2017 -Operation FREEPROCCACHE -InputValue 0x060006001ECA270EC0215D05000000000000000000000000
</code></pre>
<p>Remove a specific plan with plan_handle 0x060006001ECA270EC0215D05000000000000000000000000 from the cache via the command DBCC FREEPROCCACHE(0x060006001ECA270EC0215D05000000000000000000000000) <br>
against the instance SqlServer2017 using Windows Authentication<br></p>
<h5 id="example-5">Example:  5</h5>
<pre><code>PS C:\&gt; Invoke-DbaDbccFreeCache -SqlInstance SqlServer2017 -Operation FREEPROCCACHE -InputValue default
</code></pre>
<p>Runs the command DBCC FREEPROCCACHE('default') against the instance SqlServer2017 using Windows Authentication. This clears all cache entries associated with a resource pool 'default'.<br></p>
<h5 id="example-6">Example:  6</h5>
<pre><code>PS C:\&gt; Invoke-DbaDbccFreeCache -SqlInstance SqlServer2017 -Operation FREESYSTEMCACHE -InputValue default
</code></pre>
<p>Runs the command DBCC FREESYSTEMCACHE ('ALL', default) against the instance SqlServer2017 using Windows Authentication. This will clean all the caches with entries specific to the resource pool named <br>
&quot;default&quot;.<br></p>
<h5 id="example-7">Example:  7</h5>
<pre><code>PS C:\&gt; Invoke-DbaDbccFreeCache -SqlInstance SqlServer2017 -Operation FREESYSTEMCACHE -InputValue default -MarkInUseForRemoval
</code></pre>
<p>Runs the command DBCC FREESYSTEMCACHE ('ALL', default) WITH MARK_IN_USE_FOR_REMOVAL against the instance SqlServer2017 using Windows Authentication. This will to release entries once the entries <br>
become unused for all the caches with entries specific to the resource pool named &quot;default&quot;.<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="operation">-Operation</h5>
<p>DBCC Operation to Perform - Supports specific set of operations<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>FreeProcCache</td>
</tr>
<tr>
<td>Accepted Values</td>
<td>FreeProcCache,FreeSessionCache,FreeSystemCache</td>
</tr>
</tbody>
</table>
<h5 id="inputvalue">-InputValue</h5>
<p>Value used for Operation - meaning depends on Operation<br />
DBCC FREEPROCCACHE accepts<br />
a plan_handle of type varbinary(64)<br />
a sql_handle of type varbinary(64)<br />
or the name of a Resource Governor resource pool of type sysname<br />
If blank then clears all elements from the plan cache<br />
DBCC FREESYSTEMCACHE accepts<br />
'ALL' for ALL specifies all supported caches<br />
or name of a Resource Governor pool cache<br />
Not required for other values<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="noinformationalmessages">-NoInformationalMessages</h5>
<p>Suppresses all informational messages.<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>
<h5 id="markinuseforremoval">-MarkInUseForRemoval</h5>
<p>Used when Operation = DBCC FREESYSTEMCACHE<br />
Asynchronously frees currently used entries from their respective caches after they become unused<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>
<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>
<h5 id="whatif">-WhatIf</h5>
<p>Shows what would happen if the cmdlet runs. The cmdlet is not run.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td>wi</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="confirm">-Confirm</h5>
<p>Prompts you for confirmation before running the cmdlet.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td>cf</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>
<p> </p>

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