In the Manual, Page 62:
"Acquisition Rate, typical: Up to 2000 waveform per second per channel (Normal acquisition mode, no measurement)"
Its limited by the CPU's interface with the FPGA, pretty typical of an entry level scope. Only issue it might miss triggering on short duration, intermittent, transient signals if you're troubleshooting for some rare, specific event. Certainly if you're troubleshooting for such issues, you'll want a higher end scope with more wfms/s.. I feel 2K has been plenty for my basic use needs, certainly well faster than what it can display on screen.