The QSRollingFileAppender configuration is as follows:
<appender name="MyQSRollingFileAppender" type="Qlik.Sense.Logging.log4net.Appender.QSRollingFileAppender">
<param name="threshold" value="info" />
<param name="encoding" value="utf-8" />
<param name="file" value="C:/ProgramData/Qlik/Sense/Log/output.log"/>
<param name="maximumfiletime" value="720" />
<param name="maximumfilesize" value="512KB" />
<layout type="log4net.Layout.PatternLayout">
<converter>
<param name="name" value="rownum" />
<param name="type" value="Qlik.Sense.Logging.log4net.Layout.Pattern.CounterPatternConverter" />
</converter>
<converter>
<param name="name" value="longIso8601date" />
<param name="type" value="Qlik.Sense.Logging.log4net.Layout.Pattern.Iso8601TimeOffsetPatternConverter" />
</converter>
<converter>
<param name="name" value="hostname" />
<param name="type" value="Qlik.Sense.Logging.log4net.Layout.Pattern.HostNamePatternConverter" />
</converter>
<converter>
<param name="name" value="guid" />
<param name="type" value="Qlik.Sense.Logging.log4net.Layout.Pattern.GuidPatternConverter" />
</converter>
<converter>
<param name="name" value="user" />
<param name="type" value="Qlik.Sense.Logging.log4net.Layout.Pattern.ServiceUserNameCachedPatternConverter" />
</converter>
<converter>
<param name="name" value="encodedmessage" />
<param name="type" value="Qlik.Sense.Logging.log4net.Layout.Pattern.EncodedMessagePatternConverter" />
</converter>
<converter>
<param name="name" value="encodedexception" />
<param name="type" value="Qlik.Sense.Logging.log4net.Layout.Pattern.EncodedExceptionPatternConverter" />
</converter>
<param name="ignoresexception" value="false" />
<param name="header" value="Sequence#	Timestamp	Level	Hostname	Logger	Thread	Id	User	
Message	Exception	Id2
" />
<param name="conversionpattern" value="%rownum{9999}	%longIso8601date	%level	%hostname	%logger	%thread	
%guid	%user	%encodedmessage	%encodedexception{innermostmessage}	%guid%newline" />
</layout>
</appender>