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Docs](https://docs.paloaltonetworks.com/search) Close search modal [Introducing Idira, the next-generation identity security platform.](https://www.paloaltonetworks.com/idira?ts=markdown) [](https://www.paloaltonetworks.com/?ts=markdown) 1. [Cyberpedia](https://www.paloaltonetworks.com/cyberpedia?ts=markdown) 2. [Observability Fundamentals](https://www.paloaltonetworks.com/cyberpedia/what-is-observability?ts=markdown) 3. [What Is Observability?](https://www.paloaltonetworks.com/cyberpedia/what-is-observability?ts=markdown) Table of Contents * What Is Observability? Core Signals, Benefits, and Use Cases * [Why Observability Matters](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#matters?ts=markdown) * [How Observability Works](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#works?ts=markdown) * [The Core Signals of Observability](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#core?ts=markdown) * [Benefits of Observability](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#benefits?ts=markdown) * [Common Observability Use Cases](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#usecase?ts=markdown) * [Observability vs. Security](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#security?ts=markdown) * [Common Observability Challenges](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#challenges?ts=markdown) * [What Makes a System Observable?](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#observable?ts=markdown) * [Observability in Cloud Native Environments](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#environments?ts=markdown) * [Observability FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#page-anchor?ts=markdown) * [What Are SRE Fundamentals: SLA vs SLO vs SLI?](https://www.paloaltonetworks.com/cyberpedia/sre-fundamentals-sla-vs-slo-vs-sli?ts=markdown) * [SRE Fundamentals Explained](https://www.paloaltonetworks.com/cyberpedia/sre-fundamentals-sla-vs-slo-vs-sli#sre-fundamentals?ts=markdown) * [SLA vs. SLO vs. SLI: A Comparative Framework](https://www.paloaltonetworks.com/cyberpedia/sre-fundamentals-sla-vs-slo-vs-sli#sla-vs-slo?ts=markdown) * [Breaking Down the Components: SLI, SLO, and SLA](https://www.paloaltonetworks.com/cyberpedia/sre-fundamentals-sla-vs-slo-vs-sli#components?ts=markdown) * [The Strategic Role of Error Budgets in SRE](https://www.paloaltonetworks.com/cyberpedia/sre-fundamentals-sla-vs-slo-vs-sli#strategic-role?ts=markdown) * [Best Practices for Implementing SRE Metrics](https://www.paloaltonetworks.com/cyberpedia/sre-fundamentals-sla-vs-slo-vs-sli#best-practices?ts=markdown) * [SRE Fundamentals FAQs](https://www.paloaltonetworks.com/cyberpedia/sre-fundamentals-sla-vs-slo-vs-sli#faqs?ts=markdown) * [What Is Observability in AI Models?](https://www.paloaltonetworks.com/cyberpedia/observability-in-ai-models?ts=markdown) * [Observability Explained](https://www.paloaltonetworks.com/cyberpedia/observability-in-ai-models#explained?ts=markdown) * [Observability Data Types](https://www.paloaltonetworks.com/cyberpedia/observability-in-ai-models#types?ts=markdown) * [Observability Tools for Cloud Security](https://www.paloaltonetworks.com/cyberpedia/observability-in-ai-models#tools?ts=markdown) * [Observability FAQs](https://www.paloaltonetworks.com/cyberpedia/observability-in-ai-models#faqs?ts=markdown) * [What Is OpenTelemetry (OTel)?](https://www.paloaltonetworks.com/cyberpedia/what-is-open-telemetry?ts=markdown) * [OpenTelemetry Explained](https://www.paloaltonetworks.com/cyberpedia/what-is-open-telemetry#openTelemetry-explained?ts=markdown) * [The Three Pillars of OTel Signals](https://www.paloaltonetworks.com/cyberpedia/what-is-open-telemetry#the-three-pillars-of-OTel-signals?ts=markdown) * [Strategic Benefits and Advantages](https://www.paloaltonetworks.com/cyberpedia/what-is-open-telemetry#strategic-benefits-and-advantages?ts=markdown) * [Implementation Best Practices](https://www.paloaltonetworks.com/cyberpedia/what-is-open-telemetry#implementation-best-practices?ts=markdown) * [OpenTelemetry FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-open-telemetry#OpenTelemetry-faq?ts=markdown) * [What Is High Cardinality in Observability?](https://www.paloaltonetworks.com/cyberpedia/what-is-high-cardinality?ts=markdown) * [High Cardinality Explained](https://www.paloaltonetworks.com/cyberpedia/what-is-high-cardinality#explained?ts=markdown) * [Why High Cardinality Matters in Observability](https://www.paloaltonetworks.com/cyberpedia/what-is-high-cardinality#observability?ts=markdown) * [Cardinality vs. Dimensionality](https://www.paloaltonetworks.com/cyberpedia/what-is-high-cardinality#cardinality?ts=markdown) * [How High Cardinality Happens](https://www.paloaltonetworks.com/cyberpedia/what-is-high-cardinality#happens?ts=markdown) * [The Impact of High Cardinality on Observability Systems](https://www.paloaltonetworks.com/cyberpedia/what-is-high-cardinality#impact?ts=markdown) * [Example: How Cardinality Multiplies](https://www.paloaltonetworks.com/cyberpedia/what-is-high-cardinality#multiplies?ts=markdown) * [How to Reduce High Cardinality](https://www.paloaltonetworks.com/cyberpedia/what-is-high-cardinality#reduce?ts=markdown) * [Metrics vs. Logs vs. Traces for High-Cardinality Data](https://www.paloaltonetworks.com/cyberpedia/what-is-high-cardinality#metrics?ts=markdown) * [Best Practices for Managing High Cardinality](https://www.paloaltonetworks.com/cyberpedia/what-is-high-cardinality#practices?ts=markdown) * [Why High Cardinality Is a Governance Problem](https://www.paloaltonetworks.com/cyberpedia/what-is-high-cardinality#governance?ts=markdown) * [FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-high-cardinality#faq?ts=markdown) # What Is Observability? 3 min. read [Explore Identity Security](https://www.paloaltonetworks.com/idira?ts=markdown) Table of Contents * * [Why Observability Matters](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#matters?ts=markdown) * [How Observability Works](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#works?ts=markdown) * [The Core Signals of Observability](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#core?ts=markdown) * [Benefits of Observability](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#benefits?ts=markdown) * [Common Observability Use Cases](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#usecase?ts=markdown) * [Observability vs. Security](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#security?ts=markdown) * [Common Observability Challenges](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#challenges?ts=markdown) * [What Makes a System Observable?](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#observable?ts=markdown) * [Observability in Cloud Native Environments](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#environments?ts=markdown) * [Observability FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#page-anchor?ts=markdown) 1. Why Observability Matters * * [Why Observability Matters](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#matters?ts=markdown) * [How Observability Works](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#works?ts=markdown) * [The Core Signals of Observability](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#core?ts=markdown) * [Benefits of Observability](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#benefits?ts=markdown) * [Common Observability Use Cases](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#usecase?ts=markdown) * [Observability vs. Security](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#security?ts=markdown) * [Common Observability Challenges](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#challenges?ts=markdown) * [What Makes a System Observable?](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#observable?ts=markdown) * [Observability in Cloud Native Environments](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#environments?ts=markdown) * [Observability FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-observability#page-anchor?ts=markdown) Observability is the ability to understand a system's internal state by analyzing the data it produces. In modern environments, this typically means collecting and correlating telemetry, such as metrics, logs, traces, events, and related context, so teams can determine what is happening, why it is happening, and how to fix it more quickly. In practice, observability helps teams move beyond surface-level alerts. Instead of simply showing that something is wrong, observability helps identify where a failure began, how it spread across systems, and what dependencies or services were affected. That makes it especially valuable in cloud-native, distributed, and fast-changing environments where traditional monitoring alone often falls short. Key Points * **Definition**: Observability is the practice of using telemetry to understand how applications, infrastructure, and services behave internally from the outside. \* **Core Signals**: The most widely used observability signals are metrics, logs, and traces. Many teams also use events, profiling data, and topology context. \* **Primary Goal**: Observability helps teams troubleshoot unknown issues, reduce downtime, improve performance, and protect user experience. \* **Different from Monitoring**: Monitoring tells you when a known threshold has been crossed. Observability helps you investigate unexpected or complex failures. \* **Business Impact** : Strong observability improves root-cause analysis, reduces [mean time to resolution](https://www.paloaltonetworks.com/cyberpedia/mean-time-to-repair-mttr?ts=markdown), and supports more efficient engineering operations. ## Why Observability Matters Modern systems are harder to understand than traditional monolithic environments. Applications now run across [microservices](https://www.paloaltonetworks.com/cyberpedia/what-are-microservices?ts=markdown), containers, APIs, cloud platforms, and third-party dependencies. As systems become more distributed and dynamic, teams need more than static dashboards and predefined alerts to understand failures and performance problems. Observability gives them the visibility needed to investigate issues across the full stack. Observability is also essential because many modern failures are not predictable in advance. Monitoring is useful for known issues, but observability helps teams investigate "unknown unknowns" by correlating signals across services and infrastructure. It allows teams to ask new questions during an incident, rather than relying only on checks they thought to set up beforehand. For the business, the value is direct. Better visibility improves uptime, accelerates troubleshooting, reduces operational friction, and helps protect digital experiences. Observability also supports goals such as improving developer productivity, controlling telemetry costs, and reducing the impact of outages or performance degradation on customers. **Observability Supports AIOps and DevSecOps** Observability helps automate [AIOps](https://www.paloaltonetworks.com/cyberpedia/what-is-aiops?ts=markdown) and [DevSecOps](https://www.paloaltonetworks.com/cyberpedia/what-is-aiops?ts=markdown) by providing the continuous telemetry that those practices rely on. In AIOps, observability data such as metrics, logs, and traces support anomaly detection, root-cause analysis, and automated remediation workflows. In DevSecOps, observability enables continuous visibility across the software lifecycle, helping teams automate security checks, monitor runtime behavior, enforce policies, and respond faster to operational or security issues. ## How Observability Works Observability begins with instrumentation. Applications, services, infrastructure, and cloud environments emit telemetry data that is collected, processed, and analyzed in a central platform. Teams then use that data to understand system behavior, identify anomalies, and investigate issues across layers and dependencies. The real value comes from correlation. A single metric spike may show that something is wrong, but correlated logs and traces help explain why it happened, which service was involved, and how the issue affected upstream or downstream systems. Observability turns raw data into actionable insight by connecting telemetry with relationships, context, and timing. **Telemetry Data Reveals System Behavior** Telemetry is the operational data emitted by applications, infrastructure, and services. It acts as the digital footprint of a system, helping teams understand performance, errors, dependencies, and service health across the environment. **Instrumentation Is the Foundation** A system can only be observable if it is instrumented to generate meaningful telemetry. Instrumentation ensures that services emit the data needed for analysis, while standardized approaches such as [OpenTelemetry](https://www.paloaltonetworks.com/cyberpedia/what-is-open-telemetry?ts=markdown) help organizations collect and route telemetry in a consistent, portable way. **Context Makes Telemetry Useful** Raw data alone is not enough. To interpret what matters, teams need metadata, service relationships, topology, and code-level context. Without context, telemetry is just noise. With context, it becomes a map for investigation and remediation. ## The Core Signals of Observability The foundation of observability is telemetry: the signals that reveal how systems, applications, and services are performing in real time. While observability is often described through three core signals, modern observability depends on broader contextual data as well. **Metrics** Metrics are numerical measurements collected over time. They help teams track health and performance at scale, including latency, throughput, error rates, memory usage, and request volume. Metrics are useful for dashboards, trend analysis, alerting, and capacity planning. **Logs** Logs are timestamped records of discrete events. They capture detailed information about application behavior, system events, configuration changes, warnings, and errors. Logs are especially useful during investigations because they preserve granular evidence about what happened. **Traces** Traces follow a single request or transaction as it moves across services and dependencies. In distributed systems, traces help teams see where latency accumulates, where failures begin, and how one action can affect multiple components across the stack. **Events and Additional Context** Modern observability often goes beyond the classic three pillars. Teams may also use events, profiling data, topology maps, service relationships, metadata, code-level context, and user behavior signals to understand how systems behave in real-world conditions. Observability is strongest when these signals are connected into a coherent investigative workflow rather than left in separate tools. **Observability Goes Beyond the Three Pillars** Logs, metrics, and traces are foundational, but they are not always enough on their own. In modern distributed environments, teams also need context that shows how services interact, how performance affects users, and how infrastructure changes ripple across applications. That broader model is what turns telemetry into operational understanding. ## Benefits of Observability When implemented well, observability helps organizations improve reliability, accelerate troubleshooting, and make better operational decisions. It provides teams with the visibility needed to identify what is slow, broken, or degraded before issues escalate. Key benefits include faster root-cause analysis, stronger reliability and performance, improved visibility across cloud-native environments, better user experience, and more effective automation. Observability also helps teams connect technical problems to business outcomes by showing how issues affect service availability, operational efficiency, and customer experience. ## Common Observability Use Cases Observability supports a wide range of operational use cases across modern environments. Teams use it to troubleshoot application latency, investigate outages, monitor Kubernetes and containerized workloads, understand service dependencies, improve digital experience, and support incident response. In each case, the goal is the same: move from isolated signals to a clear explanation of system behavior. ### Observability vs. Monitoring While observability and monitoring are closely related, they serve different purposes. Monitoring tracks known conditions using predefined dashboards, thresholds, and alerts. Observability helps teams investigate unfamiliar issues by correlating telemetry across systems and dependencies. Monitoring is useful for answering questions like "Is the system up?" or "Did latency exceed a threshold?" Observability goes further by helping teams answer questions such as: * "Why did latency spike?" * "Which service caused the problem?" * "How did the failure spread?" In simple terms, monitoring tells you something is wrong; observability helps you understand why. | Category | Monitoring | Observability | | Primary Purpose | Tracks known issues and system health using predefined metrics, thresholds, and alerts | Helps teams investigate unknown issues and understand why problems happen | | Main Focus | Detecting when something goes wrong | Explaining what went wrong, where, and why | | Approach | Relies on dashboards, static rules, and alerting for expected conditions | Correlates telemetry across systems to support deeper investigation | | Questions It Answers | "Is the system up?" "Did latency spike?" "Did CPU usage cross a threshold?" | "Why did latency spike?" "Which service caused the issue?" "How did the failure spread?" | | Type of Problems | Best for known failure modes and recurring issues | Best for complex, novel, or distributed failures | | Data Used | Usually focused on selected metrics and alerts | Uses metrics, logs, traces, events, and contextual telemetry together | | Troubleshooting Depth | Indicates that a problem exists | Helps uncover root cause and downstream impact | | Use in Modern Environments | Useful for baseline health checks and alerting | Essential for troubleshooting microservices, cloud-native apps, and dynamic environments | | Outcome | Faster detection of known issues | Faster root-cause analysis and more informed remediation | |----------------------------|----------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------| ## Observability vs. Security Observability and security both analyze system data, but they are designed to support different teams, workflows, and operational goals. Observability is focused on application health, performance, availability, and user experience. Security is focused on identifying threats, suspicious behavior, policy violations, and risk. There is overlap between the two, especially when telemetry supports investigations. However, the primary users and desired outcomes are different. Observability is typically used by DevOps, SRE, engineering, and platform teams, while security telemetry is used by SOC and security teams to detect and respond to threats. ## Common Observability Challenges Although observability improves visibility across modern environments, organizations often face technical and operational challenges when implementing it at scale. Common challenges include system complexity, growing data volume, [high-cardinality telemetry](https://www.paloaltonetworks.com/cyberpedia/observability-in-ai-models?ts=markdown), and tool sprawl. Distributed architectures create more potential failure points and make troubleshooting harder. At the same time, long retention periods and high-ingest telemetry can increase cost, while too many disconnected tools slow investigations and make it harder to correlate issues across the environment. High-cardinality data adds valuable detail, but it also increases query and storage complexity. ## What Makes a System Observable? A system is truly observable when it combines comprehensive instrumentation, useful telemetry, cross-system context, and analysis that leads to action. In other words, the goal is not just to collect data, but to make that data meaningful enough for engineers to understand system behavior and respond effectively. ## Observability in Cloud Native Environments Modern observability is especially important in cloud native environments, where services are distributed, workloads are ephemeral, and code changes happen rapidly. Teams must be able to follow requests across microservices, understand short-lived containers and Kubernetes workloads, and keep pace with continuous deployment. These conditions make observability a core operational requirement rather than an optional layer of visibility. Because cloud native systems introduce more services, APIs, identities, workloads, and deployment patterns, observability also works closely with [cloud native security](https://www.paloaltonetworks.com/cyberpedia/what-is-cloud-native-security?ts=markdown) practices. Together, they help teams understand both system behavior and risk across dynamic environments. ## Observability FAQs ### Can observability help reduce MTTR? Yes. Observability can reduce mean time to resolution by helping teams quickly identify where an issue started, which services were affected, and what dependencies contributed to the problem. By correlating telemetry across the environment, teams can investigate incidents faster and resolve them with less guesswork. ### Is observability only useful for large enterprises? No. While observability is especially important in large, distributed environments, smaller organizations can also benefit from it. Any team managing cloud applications, APIs, containers, or rapidly changing services can use observability to improve troubleshooting, performance, and uptime. ### How is observability used in Kubernetes environments? In Kubernetes environments, observability helps teams track ephemeral containers, understand service-to-service communication, monitor cluster health, and troubleshoot failures that may be difficult to trace with traditional monitoring alone. It is especially valuable because workloads can scale up, move, or disappear quickly. ### What is high-cardinality data in observability? High-cardinality data refers to telemetry with many unique values, such as user IDs, container names, IP addresses, or request paths. This kind of data provides deeper investigative detail, but it can also increase storage, query complexity, and cost if not managed carefully. ### How does observability support service level objectives (SLOs)? Observability enables teams to measure whether services are meeting reliability and performance targets by providing the necessary telemetry to evaluate latency, availability, error rates, and other key service indicators. 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