[danielmyst777]

Is it possible to update sourcemod to a new snapshot when the server is running? If it is possible, will the server detect the new SM build upon a map change?

[Drixevel]

You cannot replace over the DLL files while the server is running so no. It would tell you the file is currently in use, try again, etc.

[1nsane]

On Linux you can. Just delete the files first.

But that won't make it load the new version until the server is restarted.