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                    <h1 id="get-dbalatchstatistic">Get-DbaLatchStatistic</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-DbaLatchStatistic.ps1">Get-DbaLatchStatistic</a> on GitHub.
<br>
Want to see the Bill Of Health for this command? Check out <a href="https://dataplat.github.io/boh#Get-DbaLatchStatistic">Get-DbaLatchStatistic</a>.</p>
<h2 id="synopsis">Synopsis</h2>
<p>Displays latch statistics from sys.dm_os_latch_stats</p>
<h2 id="description">Description</h2>
<p>This command is based off of Paul Randal's post &quot;Advanced SQL Server performance tuning&quot;</p>
<p>Returns:<br />
LatchClass<br />
WaitSeconds<br />
WaitCount<br />
Percentage<br />
AverageWaitSeconds<br />
URL</p>
<p>Reference:  <a href="https://www.sqlskills.com/blogs/paul/advanced-performance-troubleshooting-waits-latches-spinlocks/">https://www.sqlskills.com/blogs/paul/advanced-performance-troubleshooting-waits-latches-spinlocks/</a><br />
<a href="https://www.sqlskills.com/blogs/paul/most-common-latch-classes-and-what-they-mean/">https://www.sqlskills.com/blogs/paul/most-common-latch-classes-and-what-they-mean/</a></p>
<h2 id="syntax">Syntax</h2>
<pre><code>Get-DbaLatchStatistic
    [-SqlInstance] &lt;DbaInstanceParameter[]&gt;
    [[-SqlCredential] &lt;PSCredential&gt;]
    [[-Threshold] &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-DbaLatchStatistic -SqlInstance sql2008, sqlserver2012
</code></pre>
<p>Check latch statistics for servers sql2008 and sqlserver2012<br></p>
<h5 id="example-2">Example:  2</h5>
<pre><code>PS C:\&gt; Get-DbaLatchStatistic -SqlInstance sql2008 -Threshold 98
</code></pre>
<p>Check latch statistics on server sql2008 for thresholds above 98%<br></p>
<h5 id="example-3">Example:  3</h5>
<pre><code>PS C:\&gt; $output = Get-DbaLatchStatistic -SqlInstance sql2008 -Threshold 100 | Select-Object * | ConvertTo-DbaDataTable
</code></pre>
<p>Collects all latch statistics on server sql2008 into a Data Table.<br></p>
<h5 id="example-4">Example:  4</h5>
<pre><code>PS C:\&gt; 'sql2008','sqlserver2012' | Get-DbaLatchStatistic
</code></pre>
<p>Get latch statistics for servers sql2008 and sqlserver2012 via pipline<br></p>
<h5 id="example-5">Example:  5</h5>
<pre><code>PS C:\&gt; $cred = Get-Credential sqladmin
PS C:\&gt; Get-DbaLatchStatistic -SqlInstance sql2008 -SqlCredential $cred
</code></pre>
<p>Connects using sqladmin credential and returns latch statistics from sql2008<br></p>
<h5 id="example-6">Example:  6</h5>
<pre><code>PS C:\&gt; $output = Get-DbaLatchStatistic -SqlInstance sql2008
PS C:\&gt; $output
PS C:\&gt; foreach ($row in ($output | Sort-Object -Unique Url)) { Start-Process ($row).Url }
</code></pre>
<p>Displays the output then loads the associated sqlskills website for each result. Opens one tab per unique URL.<br></p>
<h3 id="required-parameters">Required Parameters</h3>
<h5 id="sqlinstance">-SqlInstance</h5>
<p>The SQL Server instance. Server version must be SQL Server version 2005 or higher. <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="threshold">-Threshold</h5>
<p>Threshold, in percentage of all latch stats on the system. Default per Paul's post is 95%.<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>95</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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