And just one more thing to factor in:
log4j.threshold=........
This property defines the base threshold that ALL log events must be
greater than or equal to before going on and evaluating the
category/logger & appender thresholds that have been discussed.
This property is like the primary valve in a water pipe system
regulating the main flow in a very very course manor.
By default this top level threshold is "ALL". But you could set it to,
say, INFO to effectively discard/ignore all DEBUGs in the quickest way
possible.
Hope that helps.
Paul Smith
On Fri, 2004-04-02 at 14:25, Kawthar Bt M Sulaiman wrote:
> Oh ok.... now I understand.
>
> Thank you.
> --Kawthar
>
> >>> [EMAIL PROTECTED] 02/04/2004 12:15:20 PM >>>
> On Fri, 2004-04-02 at 16:01, Kawthar Bt M Sulaiman wrote:
> > Hi,
> >
> > In this file, there's:
> >
> > log4j.rootCategory=debug, MO ----> <first>
> >
> > Then,
> >
> > log4j.appender.MO=org.apache.log4j.DailyRollingFileAppender
> > log4j.appender.MO.Threshold=DEBUG. -----> <second>
> > ...
> >
> > My question, is the debug <on first> and <debug on second> has the
> > same
> > meaning? So, if I just want to log INFO and above, do I change the
> > Threashold=INFO only or both?
>
> When some code logs a message, it specifies a priority and a category.
> If the message priority is less than the category priority, then the
> message is totally ignored.
>
> Once the message gets past that first cutoff, some significant work
> gets
> done (creating a LogEvent object etc), then the message is sent on to
> each appender (ie "outputter") associated with the category.
>
> If any of those appenders has a threshold set, then that appender
> discards (ignores) the message if its priority is less than the
> threshold.
>
> So this allows you to say:
> * category X has two appenders: file and email
> * for category X, ignore everything lower than INFO
> * for the file appender, accept all that pass the category priority
> (ie no threshold set)
> * for the email appender, ignore those messages which got past the
> category filtering, but are lower than WARN
>
> It is more efficient to filter at the category level than the appender
> level, but if you want different amounts of detail written to different
>
> appenders for the same category, then the threshold setting allows you
> to do this.
>
> Cheers,
>
> Simon
>
>
>
>
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