Revision: 16728
          http://sourceforge.net/p/gate/code/16728
Author:   ian_roberts
Date:     2013-07-08 11:26:25 +0000 (Mon, 08 Jul 2013)
Log Message:
-----------
Documentation for the new logging level

Modified Paths:
--------------
    userguide/trunk/machine-learning.tex

Modified: userguide/trunk/machine-learning.tex
===================================================================
--- userguide/trunk/machine-learning.tex        2013-07-08 11:12:19 UTC (rev 
16727)
+++ userguide/trunk/machine-learning.tex        2013-07-08 11:26:25 UTC (rev 
16728)
@@ -561,14 +561,22 @@
 value \texttt{X} is `true' or `false'. The default value is `true'.
 
 \item The parameter {\em {\bf VERBOSITY}} specifies the verbosity level of the
-output of the system, both to the message window of GATE Developer (or 
standard out when
-using GATE Embedded) and into the log file.  Currently there are three 
verbosity
-levels. Level 0 only allows the output of warning messages.  Level 1 outputs 
some
-important setting information and the results for evaluation mode. Level 2 is
-used for debugging purposes. The element in the configuration
-file appears as so:\\
+output of the system, both to the message window of GATE Developer (or standard
+out when using GATE Embedded) and into the log file.  Currently there are
+four verbosity levels. \texttt{MINIMUM} (0) only allows the output of
+warning messages.  \texttt{NORMAL} (1) outputs some important setting
+information and the results for evaluation mode. \texttt{DEBUG} (2) is
+used for debugging purposes. The special level \texttt{NONE} disables {\em all}
+logging, and does not even attempt to open the log file.  This level
+{\em should} be used when running the learning PR in a production system (the
+PR will run much faster with logging disabled), and in particular {\em must} be
+used when running in a multithreaded system (such as GATECloud.net).  The
+element in the configuration file appears as so:\\
 \ \ \ \ \ {\em $<$VERBOSITY level="\texttt{X}"/$>$}\\
-The value \texttt{X} can be set as 0, 1 or 2. The default value is  1.
+The value \texttt{X} can be set as \texttt{NONE}, \texttt{MINIMUM},
+\texttt{NORMAL} or \texttt{DEBUG} (for backwards compatibility the numeric
+equivalents -1, 0, 1 or 2 may be used instead). The default value is
+\texttt{NORMAL}.
 
 \item {\em {\bf MI-TRAINING-INTERVAL}} specifies the minimal number 
 of newly added documents needed to trigger retraining the model. This

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