To put the system into maintenance mode @ Maintenance @ MentDB Weak

Copy#Set the MQL engine to maintenance;
maintenance set 1 0 0 0 0;
#Set the WS engine to maintenance;
maintenance set 0 1 0 0 0;
#Set the WEB engine to maintenance;
maintenance set 0 0 1 0 0;
#Set the JOB engine to maintenance;
maintenance set 0 0 0 1 0;
#Set the STACK engine to maintenance;
maintenance set 0 0 0 0 1;
#Set many engines to maintenance;
maintenance set 0 1 1 1 1;

#to reload maintenance information into your editor;
maintenance get;

Copy# example;
# disable the WEB engine;
maintenance set 0 0 1 0 0;
maintenance get;