
…t you have to know how the system works. The query is slow. The database is experiencing high load. Before approaching an optimisation problem, first you cannot work blind. Having a monitoring infrastructure that surfaces all the key metrics allows the engineer to understand what is going on under the hood of the data warehouse/database engine. This will allow engineers to take precise action that delivers the biggest impact, as any optimisation work is done only because the key metrics insights says so. This will save hours of engineering time, and allows preventive measures to be in place before the …