Understanding the need for monitoring

Imagine that you're asked to provide historical data to the CIO, as an ongoing project requires information on how much CPU the entire ecosystem is using on average, but the business never invested the time to implement a good monitoring system. Therefore, your only option is to log into each system and run local commands, record results into a spreadsheet, do some math to obtain the average results, and, after all this, you realize that the data is no longer valid and you have to go through all of this again. This is precisely why we have monitoring systems such as Elasticsearch. The same process could've taken you a couple of minutes. Not just that, you would be getting accurate data and real-time reports. Let's find out more about what monitoring is, and why you, as an architect, should consider it to be the best thing ever...