[water1]

Where can I see what cfg is used for my server cfg

[TomL.]

Which game?

[Bacardi]

If you type in server console cvar name, without value:
servercfgfile

...you see which server cfg file it execute every map change
https://developer.valvesoftware.com/wiki/Servercfgfile

But, it is not only file which get executed. You need tell us which game you mean.

[water1]

Originally Posted by TomL. Which game?

CS:GO

[TomL.]

For CS:GO you basically want to work with these 3 configs.

The autoexec.cfg which will be only executed on server start. It should only contain cvar/commands that have to be set only one time such as sv_downloadurl.

The server.cfg which will be executed after every map change. It should contain basic cvar/commands you want to set which will not be changed by game mode or other configs.

The gamemode_X_server.cfg (X is the gamemode name such as casual) which will be executed every map change after the server.cfg. This file should contain all cvar/commands based on the game mode you want to run like mp_roundtime, mp_maxrounds etc..