Debug high CPU usage in tModloader

Terraria has a single main game thread that is used for all game activities including monster spawn, ai, and more. Sometimes a mod will cause misbehavior which will drastically increase the CPU usage where you experience this kind of behavior and the server will constantly use a full CPU core (100%). We recommend finding the mod causing this issue and removing it from your server. Adding an additional CPU core generally will not help performance outside a few mod cases where their functions run on a separate core.

Debugging Steps

Go to the AleForge Panel
Go to the Console and Stop the server
Go to Backups and create a backup
Open your enabled.json in the /mods folder in the File Manager tab
Disable one mod
Start the server
Join the server with two or more players to test
Stop the Server
Repeat steps 3-6 until the issue is resolved
Stop the server
Restore the backup
Edit the enable.json to disable the mod you determined was the issue
Start the server

Likely Mods

Our customers have reported several mods that can cause these problems so these are usually a good place to start if you have them installed.

Spirit Mod
MagicStorage
MagicStorageExtra
AnotherRPGMod
Alchemist Mod
WeaponSoutLite