Hello, A very simple test : I had opened two tabs on amphi and read a parquet file on each. I then close the two tabs. The used RAM hasn't changed at all. <img width="965" height="457" alt="Image" src="https://github.com/user-attachments/assets/a25333aa-535a-4b52-92ac-4da151027d2a" /> <img width="643" height="355" alt="Image" src="https://github.com/user-attachments/assets/95cd58c0-1ed6-44a0-bf9d-7471ccf23379" /> The only way I see is to shut down Amphi. Best regards, Simon