在托管我的Web应用程序的办公室里，LOG4J显示在本地测试的典型操作花费的时间不到1秒，

07 Nov 2019 12:30:01,860 INFO  ParticipantServiceImpl(Line 272) - User 1: Operation Start
...
07 Nov 2019 12:30:02,796 INFO  ParticipantServiceImpl(Line 881) - User 1: Operation End

Production LOG4J显示，由于许多并发用户通过手机连接世界各地，因此平均操作时间接近5-7秒。输出通常是混乱的，而且混乱的，但是我担心时间戳：时间戳本身是否可靠（即使混乱）？在真实的用户体验中确实存在性能问题，还是LOG4J会出现刷新或并发延迟？

07 Nov 2019 12:30:01,860 INFO  ParticipantServiceImpl(Line 272) - User 1: Operation Start
07 Nov 2019 12:31:01,860 INFO  ParticipantServiceImpl(Line 272) - User 2: Operation Start
...
07 Nov 2019 12:37:02,796 INFO  ParticipantServiceImpl(Line 881) - User 1: Operation End

LOG4J配置为

    <RollingFile name="file" fileName="/local/content/tomcat/app/logs/app.log" append="true"
        filePattern="/local/content/tomcat/app/logs/app.log.%i"> 
        <PatternLayout>
            <Pattern>%d{DATE} %-5p %c{1}(Line %L) - %m%n</Pattern>
        </PatternLayout>
        <Policies>
            <SizeBasedTriggeringPolicy size="5 MB" />
        </Policies>
        <DefaultRolloverStrategy max="5" />
    </RollingFile>
</Appenders>

<Loggers>    
    <Logger name="com.app" level="debug">
    <AppenderRef ref="console"/>
        <AppenderRef ref="file"/>
    </Logger>

    <Logger name="com.opensymphony.xwork2.interceptor" level="info">
        <AppenderRef ref="file" />
    </Logger>

    <Logger name="org.springframework.orm" level="info">
        <AppenderRef ref="file" />
    </Logger>    

    <Logger name="org.hibernate.engine.transaction" level="DEBUG">
        <AppenderRef ref="console" />
    </Logger>   

    <Logger name="net.sf.ehcache" level="trace">
        <AppenderRef ref="file" />
    </Logger>

    <Root level="info">
      <AppenderRef ref="console"/>
      <AppenderRef ref="file"/>
    </Root>
</Loggers>