They paid us $600K every six months to analyze the data and suggest adjustments to their control systems (it's called continuous commissioning, but it's not rea

They paid us $600K every six months to analyze the data and suggest adjustments to their control systems (it's called continuous commissioning, but it's not really continuous due to laws in many places about requiring a person in the loop on controls). They saved millions of dollars every year doing this, because large, complex buildings drift out of optimized airflow and electricity use very quickly. Agreed that 20 year retention is silly. We thought it was silly, but the policies reflected the need for historical analysis for audit purposes. It does in fact matter what you can fit in RAM though. We had to adapt all our systems to a janky SQL Server setup that was horrible for time series data and make our software run on those servers. RAM availability for working sets was a huge bottleneck (hence the cost of analysis).