public MetricQuery withMetric(String metric) {
        setMetric(metric);
        return this;
    }
<p>
The name of a Performance Insights metric to be measured.
</p>
<p>
Valid values for <code>Metric</code> are:
</p>
<ul>
<li>
<p>
<code>db.load.avg</code> - A scaled representation of the number of active sessions for the database engine.
</p>
</li>
<li>
<p>
<code>db.sampledload.avg</code> - The raw number of active sessions for the database engine.
</p>
</li>
<li>
<p>
The counter metrics listed in <a href=
"https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/USER_PerfInsights_Counters.html#USER_PerfInsights_Counters.OS"
>Performance Insights operating system counters</a> in the <i>Amazon Aurora User Guide</i>.
</p>
</li>
<li>
<p>
The counter metrics listed in <a href=
"https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_PerfInsights_Counters.html#USER_PerfInsights_Counters.OS"
>Performance Insights operating system counters</a> in the <i>Amazon RDS User Guide</i>.
</p>
</li>
</ul>
<p>
If the number of active sessions is less than an internal Performance Insights threshold,
<code>db.load.avg</code> and <code>db.sampledload.avg</code> are the same value. If the number of active sessions
is greater than the internal threshold, Performance Insights samples the active sessions, with
<code>db.load.avg</code> showing the scaled values, <code>db.sampledload.avg</code> showing the raw values, and
<code>db.sampledload.avg</code> less than <code>db.load.avg</code>. For most use cases, you can query
<code>db.load.avg</code> only.
</p>

@param metric
       The name of a Performance Insights metric to be measured.</p>
       <p>
       Valid values for <code>Metric</code> are:
       </p>
       <ul>
       <li>
       <p>
       <code>db.load.avg</code> - A scaled representation of the number of active sessions for the database
       engine.
       </p>
       </li>
       <li>
       <p>
       <code>db.sampledload.avg</code> - The raw number of active sessions for the database engine.
       </p>
       </li>
       <li>
       <p>
       The counter metrics listed in <a href=
       "https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/USER_PerfInsights_Counters.html#USER_PerfInsights_Counters.OS"
       >Performance Insights operating system counters</a> in the <i>Amazon Aurora User Guide</i>.
       </p>
       </li>
       <li>
       <p>
       The counter metrics listed in <a href=
       "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_PerfInsights_Counters.html#USER_PerfInsights_Counters.OS"
       >Performance Insights operating system counters</a> in the <i>Amazon RDS User Guide</i>.
       </p>
       </li>
       </ul>
       <p>
       If the number of active sessions is less than an internal Performance Insights threshold,
       <code>db.load.avg</code> and <code>db.sampledload.avg</code> are the same value. If the number of active
       sessions is greater than the internal threshold, Performance Insights samples the active sessions, with
       <code>db.load.avg</code> showing the scaled values, <code>db.sampledload.avg</code> showing the raw
       values, and <code>db.sampledload.avg</code> less than <code>db.load.avg</code>. For most use cases, you
       can query <code>db.load.avg</code> only.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-pi/src/main/java/com/amazonaws/services/pi/model/MetricQuery.java