<DD>Test the configuration file syntax (<EM>i.e.</EM>, read all configuration files
and interpret them) but do not start the server. If the configuration contains
errors, display an error message and exit with a non-zero exit status,
-otherwise display "Syntax OK" and terminate with a zero exit status.
+otherwise display "Syntax OK" and terminate with a zero exit status. This
+command checks to see if all DocumentRoot entries exist and are directories.
+For sites with many vhosts, this is expensive; consider the <CODE>-T</CODE>
+command instead.
+
+<DT><CODE>-T</CODE>
+<DD>Test the configuration file syntax (<EM>i.e.</EM>, read all configuration files
+and interpret them) but do not start the server. If the configuration contains
+errors, display an error message and exit with a non-zero exit status,
+otherwise display "Syntax OK" and terminate with a zero exit status. This
+command does not perform any checking of the DocumentRoot entries.
<DT><CODE>-k</CODE> <EM>option</EM>
<DD>Windows only: signal Apache to restart or shutdown. <EM>option</EM>
<DD>Test the configuration file syntax (<EM>i.e.</EM>, read all configuration files
and interpret them) but do not start the server. If the configuration contains
errors, display an error message and exit with a non-zero exit status,
-otherwise display "Syntax OK" and terminate with a zero exit status.
+otherwise display "Syntax OK" and terminate with a zero exit status. This
+command checks to see if all DocumentRoot entries exist and are directories.
+For sites with many vhosts, this is expensive; consider the <CODE>-T</CODE>
+command instead.
+
+<DT><CODE>-T</CODE>
+<DD>Test the configuration file syntax (<EM>i.e.</EM>, read all configuration files
+and interpret them) but do not start the server. If the configuration contains
+errors, display an error message and exit with a non-zero exit status,
+otherwise display "Syntax OK" and terminate with a zero exit status. This
+command does not perform any checking of the DocumentRoot entries.
<DT><CODE>-k</CODE> <EM>option</EM>
<DD>Windows only: signal Apache to restart or shutdown. <EM>option</EM>