buffer size to send waveform to AWG

I am using MATLAB to communicate with a Tektronix AWG70002A Waveform Generator. I currently have code to send waveform data from a .mat file to the waveform generator, but the command requires two variables named 'DataBuf' and 'DataBufBufferSize'. I have been unable to locate any information regarding waveform buffer size. Is there a specific number or a general size that can be used to send the data to the generator?