spring-session-data-mongodb-examples/spring-session-data-mongodb-reactive-boot/src/main/resources/logback.xml

<configuration>
	<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
		<encoder>
			<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
		</encoder>
	</appender>

	 <logger name="org.springframework.data.mongodb" level="DEBUG"/>

	<root level="INFO">
		<appender-ref ref="STDOUT" />
	</root>

</configuration>