Figure 5

Memory needed to process each database. The memory required to deal with different databases depends not only on their number of samples and SNPs, but also on the raw data files structure. Although not more than 1 GB of memory has been enough for most the databases, the Stanford data needed some more due to its high population coverage. The fact of containing so many samples and representing so many populations on single files per chromosome forced the processing script to store plenty of indexed information that demanded high computational resources. The optimized design of the variables, along with the strict memory handling of the script, minimized this issue never requiring more than 2 GB.