public Integer getPerformanceInsightsRetentionPeriod() {
        return this.performanceInsightsRetentionPeriod;
    }
<p>
The number of days to retain Performance Insights data.
</p>
<p>
This setting doesn't apply to RDS Custom DB instances.
</p>
<p>
Valid Values:
</p>
<ul>
<li>
<p>
<code>7</code>
</p>
</li>
<li>
<p>
<i>month</i> * 31, where <i>month</i> is a number of months from 1-23. Examples: <code>93</code> (3 months * 31),
<code>341</code> (11 months * 31), <code>589</code> (19 months * 31)
</p>
</li>
<li>
<p>
<code>731</code>
</p>
</li>
</ul>
<p>
Default: <code>7</code> days
</p>
<p>
If you specify a retention period that isn't valid, such as <code>94</code>, Amazon RDS returns an error.
</p>

@return The number of days to retain Performance Insights data.</p>
        <p>
        This setting doesn't apply to RDS Custom DB instances.
        </p>
        <p>
        Valid Values:
        </p>
        <ul>
        <li>
        <p>
        <code>7</code>
        </p>
        </li>
        <li>
        <p>
        <i>month</i> * 31, where <i>month</i> is a number of months from 1-23. Examples: <code>93</code> (3
        months * 31), <code>341</code> (11 months * 31), <code>589</code> (19 months * 31)
        </p>
        </li>
        <li>
        <p>
        <code>731</code>
        </p>
        </li>
        </ul>
        <p>
        Default: <code>7</code> days
        </p>
        <p>
        If you specify a retention period that isn't valid, such as <code>94</code>, Amazon RDS returns an error.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/CreateDBInstanceReadReplicaRequest.java