--- title: "Observability: Beyond Monitoring | SUMāTO" description: "Monitoring vs. observability: its three pillars (metrics, logs, traces) and why distributed systems demand it. 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[Operación y Soporte](https://sumatogroup.com/en/insights/tag/operación-y-soporte) # Observability: Beyond Monitoring [Andrés Lozada](https://sumatogroup.com/en/insights/author/andres-lozada) · Aug 20, 2019, 8:00:00 AM · 7 min read At three in the morning, an alert warns that the system is down. Monitoring does its job: it tells you **what** failed. But when you open the dashboard, you find everything green except one intermittent service, and the real question goes unanswered: **why** did it fail? In modern architectures, where a single user request crosses dozens of services, that gap between knowing what happened and understanding why it happened is precisely the ground observability comes to occupy. **In short:** Monitoring tells you whether your systems are working according to conditions you defined in advance; observability lets you ask new questions about behaviors you never anticipated. It rests on three pillars -metrics, logs and traces- and becomes indispensable when distributed systems make it impossible to reason about the whole by looking at a single part. ## Monitoring and observability are not synonyms For years, to monitor meant watching a handful of known indicators: CPU usage, memory, the availability of a server. You defined thresholds and, when they were crossed, the alert arrived. It worked well with monolithic applications, where system behavior was relatively predictable and the failure modes were limited. Observability starts from a different premise. Instead of asking only about what you already know can fail, it seeks to give you the ability to interrogate the system about situations you never imagined. The practical difference is this: - **Monitoring answers known questions:** is the service up? how much latency does it have? did the disk fill up? - **Observability answers unknown questions:** why does this 2% of users in a specific region, using a particular payment method, experience slowness only on Monday mornings? It is not about replacing one with the other. Monitoring remains the foundation. Observability is the layer that lets you explore the unexpected, and that capability matters more and more as systems become less predictable. ## The three pillars: metrics, logs and traces Observability is built on three types of telemetry data. Each offers a different view, and their real value appears when they are used together. ### Metrics These are numeric values aggregated over time: requests per second, latency, error rate, resource consumption. They are cheap to store and fast to query, which makes them ideal for dashboards and alerts. Their limit is that they summarize: they tell you the error rate went up, but not which individual request failed or why. ### Logs These are records of discrete events, with a timestamp and context. They capture the detail that metrics lose. The challenge in large systems is volume and dispersion: thousands of lines spread across services. That is why it is best to move toward **structured logs** -in a consistent format, ideally with identifiers that allow them to be correlated- rather than free text that is hard to query. ### Traces These are the pillar that distributed systems made essential. A trace follows the complete journey of a request as it passes from one service to another, measuring how long it takes at each hop. When an operation that crosses eight microservices becomes slow, the trace shows you exactly which leg the time was lost in, something neither metrics nor isolated logs can reveal clearly. The strength lies in correlation. A metric alerts you to the anomaly, the trace points to the culprit service and that service's logs explain the cause. Together, the three pillars tell a story that, separately, would remain incomplete. ## Why distributed systems demand it In a monolith, almost everything happened within a single process. If something broke, the trail was in one place. The adoption of microservices, containers and orchestrators changed that landscape radically: - **State is spread out:** a user transaction may touch dozens of services, each with its own lifecycle and its own data. - **Infrastructure is ephemeral:** containers are born and die in minutes, so connecting to a machine to check what happened is no longer a viable option. - **Failures are partial and combined:** rarely does everything go down at once; the usual pattern is subtle degradation that emerges from the interaction between components that are healthy on their own. In this context, watching individual components is no longer enough. You need to understand the behavior of the system as a whole, and that is only possible if each service emits enough telemetry to reconstruct what happened without having to reproduce the problem. That is the essence of observability: making the system's internal state inferable from the outside. ## How to start without getting overwhelmed Adopting observability does not require transforming everything at once. A sensible path is incremental: - **Instrument what hurts most:** start with the critical services or those that generate the most incidents, not with all of them at once. - **Standardize telemetry:** adopt structured logs and a common instrumentation format, so the data is correlatable across teams. - **Propagate context:** make sure a request identifier travels through all the services; without that connecting thread, traces do not link together. - **Define signals that matter:** latency, traffic, errors and saturation are usually a good starting point for deciding what to measure first. - **Watch the cost:** storing everything, always, gets expensive fast. Have a sampling and retention policy from the outset. And, above all, remember that observability is as much culture as it is tooling. There is little point in instrumenting if no one uses that data to investigate. The goal is that, faced with an incident, the team can formulate and answer questions with evidence, instead of guessing. ## The role of the team that watches Technology enables observability, but someone has to watch, interpret and act. In operations that run around the clock, having a [network operations center (NOC)](https://sumatogroup.com/noc) that combines the three telemetry sources makes the difference between catching a degradation early and finding out only when the customer is already complaining. For many organizations in the region, building that capability internally -with staff on shifts, tools and processes- is costly and slow. That is why relying on [managed services](https://sumatogroup.com/servicios-administrados) often accelerates operational maturity: you gain observability practices that are already road-tested, without having to learn them the hard way during a crisis. ## Frequently asked questions ### Does observability replace monitoring? No. Monitoring is still needed to watch known conditions and trigger alerts. Observability is a broader layer that lets you investigate behaviors you did not anticipate. They coexist and complement each other. ### Do I need all three pillars from day one? It is not mandatory, but it is advisable to work toward them. Many teams start with metrics and logs, which they already have, and later add traces when distributed complexity justifies it. The value grows as the data becomes correlated. ### Does it only apply to microservices? That is where it becomes indispensable, but the principles benefit any system. Even a more traditional application gains clarity with structured logs and good metrics. The difference is that in distributed systems it stops being optional. ### What is the biggest obstacle to adopting it? More than technical, it is usually cultural and cost-related. Instrumenting generates large volumes of data that cost money and discipline to manage, and it is useless if the team does not adopt the habit of investigating with that evidence. ## The first step Observability is not a product you buy or a switch you flip: it is a capability you build service by service, habit by habit. The first step is usually the simplest and the most revealing: choose a critical system, look honestly at which questions you could answer today if it failed at midnight, and start closing the gaps you find. At SUMāTO we accompany organizations across LATAM along that journey, from the initial instrumentation to continuous operation. If you would like to talk about how to take that first step in your context, [let's talk](https://sumatogroup.com/contacto). Next step Where does your IT function stand today, and what closes the gap? [IT Maturity Assessment →](https://sumatogroup.com/en/it-maturity-assessment) [Operación y Soporte](https://sumatogroup.com/en/insights/tag/operación-y-soporte) ![Andrés Lozada](https://sumatogroup.com/hs-fs/hubfs/SPEAKERS/AL.jpeg?width=56&height=56&name=AL.jpeg) Andrés Lozada Aug 20, 2019, 8:00:00 AM [LinkedIn](https://www.linkedin.com/in/andreslozada/) ### Explore more from SUMāTO [Enterprise AI](https://sumatogroup.com/en/artificial-intelligence) [Enterprise Transformation](https://sumatogroup.com/en/enterprise-transformation) [Strategic Consulting](https://sumatogroup.com/en/strategic-consulting) [AI Agent](https://sumatogroup.com/en/artificial-intelligence) [AI Contact Center](https://sumatogroup.com/en/artificial-intelligence) [Cybersecurity](https://sumatogroup.com/en/cybersecurity) ### Related Posts #### [2023 IT Trends: The Year of Generative AI](https://sumatogroup.com/en/insights/blog/tendencias-ti-2023) December arrives with a new question in every board meeting: what do we do about generative [artificial intelligence](https://sumatogroup.com/en/artificial-intelligence)? In a matter of weeks it went... #### [2018 IT Trends: The CIO's Agenda](https://sumatogroup.com/en/insights/blog/tendencias-ti-2018) Every December I repeat the same exercise with my team: we close out the year's projects, look at what we promised in January and ask ourselves what... #### [2020 IT Trends: The CIO's Agenda](https://sumatogroup.com/en/insights/blog/tendencias-ti-2020) With only a few weeks left to close out the decade, the board of any organization in LATAM faces the same question: which technologies are worth... ![SUMāTO](https://sumatogroup.com/hs-fs/hubfs/BRANDING/SUM%C4%81TO%20%7C%20LOGO%201000x500.png?width=200&height=100&name=SUM%C4%81TO%20%7C%20LOGO%201000x500.png) Strategic technology planning consultants. 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