Thank, Ceki. I obviously take your concerns very seriously and will look into these asap.
Ralph On Sep 22, 2012, at 6:21 AM, ceki wrote: > Hello, > > Looking at the log4j/log42/logback comparison [1], I have noticed a > number of inaccuracies. > > item 2) The performance of deciding whether to log or not to log when > logging is turned on. > > Logback does not walk the hierarchy. No, really. It doesn't. > > item 2) Actually outputting log messages > > For the log4j2 figures your have the "immediateFlush" property set to > false. For the logback figures you have "immediateFlush" property set > to true. > > Quoting from [2] and [3] > > By default, the OutputStream is immediately flushed, unless the > immediateFlush property is explicitly set to 'false'. Setting the > immediateFlush property to false can significantly improve logging > throughput. > > The default value for immediateFlush is 'true'. Immediate flushing of > the output stream ensures that logging events are immediately written > to disk and will not be lost in case your application exits without > properly closing appenders. On the other hand, setting this property > to 'false' is likely to quintuple (your mileage may vary) logging > throughput. As mentioned previously, if immediateFlush is set to > 'false' and if appenders are not closed properly when your application > exits, then logging events not yet written to disk may be lost. === > ==== > > For an honest comparison, both frameworks should use comparable > settings. In this particular case, the setting is called > "immediateFlush" and carries the same name in both frameworks. > > > [1] http://logging.apache.org/log4j/2.x/performance.html > [2] http://logback.qos.ch/manual/encoders.html#LayoutWrappingEncoder > [3] http://logback.qos.ch/manual/encoders.html#immediateFlush > > -- > Ceki > > --------------------------------------------------------------------- > To unsubscribe, e-mail: log4j-dev-unsubscr...@logging.apache.org > For additional commands, e-mail: log4j-dev-h...@logging.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: log4j-dev-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-dev-h...@logging.apache.org
