You can disable the cache but trust me you don't want to. Your host would be complaining about the server load (CPU) and your members would hate the performance.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.