problems doing shaper calibrate (solved)

Hi
I am trying to run shaper calibrate it runs the X axis test and then stops and tries to do the calculations but it seems the pi throttles itself because the system loads show that the CPU is 100% and the ram is at 97% and it won't finish the task.
The pi is a pi 3 A+ and the adxl is connected to the octopus pro board.
Thank you DS