Enabled and disabled cracking option on monetdb

Hi,

I am a student at Simon Bolivar University in Venezuela , i' ve been performing an experimental study using MonetDB - v11.17.21 (Jan2014-SP3). I was reading two papers by MonetDb developers about Database Cracking where authors got better results with cracking enabled than without it. In these papers, authors stated that they were able to turn on and off the cracking facilities in monetdb. However, I haven' t been able to find information on how this can be done.

In my experimental study, I also need to run my queries and study the performace differences obtained using thes two options.

My actual question: do you know how I can turn on and off the cracking option on monetdb? Do you have documentation that explain this?

Thanks in advance,