public java.util.List<String> getMetricTypes() {
        return metricTypes;
    }
<p>
The types of metrics to return in the response. Valid values in the array include the following:
</p>
<ul>
<li>
<p>
<code>os</code> (OS counter metrics) - All engines
</p>
</li>
<li>
<p>
<code>db</code> (DB load metrics) - All engines except for Amazon DocumentDB
</p>
</li>
<li>
<p>
<code>db.sql.stats</code> (per-SQL metrics) - All engines except for Amazon DocumentDB
</p>
</li>
<li>
<p>
<code>db.sql_tokenized.stats</code> (per-SQL digest metrics) - All engines except for Amazon DocumentDB
</p>
</li>
</ul>

@return The types of metrics to return in the response. Valid values in the array include the following:</p>
        <ul>
        <li>
        <p>
        <code>os</code> (OS counter metrics) - All engines
        </p>
        </li>
        <li>
        <p>
        <code>db</code> (DB load metrics) - All engines except for Amazon DocumentDB
        </p>
        </li>
        <li>
        <p>
        <code>db.sql.stats</code> (per-SQL metrics) - All engines except for Amazon DocumentDB
        </p>
        </li>
        <li>
        <p>
        <code>db.sql_tokenized.stats</code> (per-SQL digest metrics) - All engines except for Amazon DocumentDB
        </p>
        </li>
aws-java-sdk-pi/src/main/java/com/amazonaws/services/pi/model/ListAvailableResourceMetricsRequest.java