Use the virtual client, and uses the same game logic, so that a large number of players login the robot simulation game server, we can observe that the server is running condition, with debug to find bottlenecks.
[kbe@gameserver ~]$ ./bots &
kbe/bin/server/!(win)start_bots.bat
kbe/bin/server/bots_start.sh
see also kbengine_defaults.xml->bots
Reference: assets/scripts/bots script-sources(https://github.com/kbengine/kbengine_demos_assets).