Operations | Monitoring | ITSM | DevOps | Cloud

If you feel like your incidents are multiplying while your stack gets more complex by the week, you’re not alone. Event volumes keep climbing, signals live in a dozen tools, and human responders are stretched thin. That’s exactly why we built the PagerDuty SRE Agent—a vendor‑agnostic AI teammate that improves with every response to make the next one faster, smarter, and more reliable.

Getting telemetry out of a distributed system isn’t the hard part. Getting it out cleanly, without noise, drop-offs, or odd performance side-effects — that’s where things get interesting. Before you worry about processors or storage costs, you need a clear plan for where the OTel Collector should run. Most teams narrow this down to two options: a sidecar that sits next to each service, or a node-level agent that handles data for everything running on the node. Both patterns are solid.

You're sampling 1% of traces in production. A payment request fails at 3 AM. Logs show an error in order-service, but the full picture isn't there because different services made different sampling decisions. order-service kept the trace; payment-service didn't. So you end up checking logs and timestamps across a few services to piece things together. This happens because the usual probability sampling approach makes a separate choice at each service boundary.

In a microservices architecture, a single user request can pass through multiple services before completing. When performance drops or an error occurs, tracing that journey is the only way to locate the source. Distributed tracing provides that visibility. At its core are OpenTelemetry Spans — units of work that capture what each service does during a request.

Observability has become a core part of running Ruby applications at scale. Knowing how your app performs — from request latency to background job execution — helps catch slowdowns early and improve reliability. This blog walks through some of the most useful APM tools for Ruby in 2025. Each section highlights what the tool does well, where it fits best, and what kind of visibility it brings to your application's performance.

When a Node.js app slows down, you don’t get a clear picture right away. One service stalls, another spikes in CPU, and somewhere in between, requests start piling up. You can’t fix what you can’t see. Application Performance Monitoring (APM) tools close that gap. They capture request traces, latency, and errors across your stack — showing you what’s running slow and why.

A slow checkout request. A background job stuck waiting on another service. A log message that looks fine — until performance drops. In a Node.js microservices setup, these are the moments that test your observability. You know something's wrong, but tracing the request across dozens of services feels impossible. Distributed tracing changes that. It connects every span in the request's journey, showing exactly where time is spent and where things start to break down.

Gartner recognizes Last9 in their latest Cool Vendor report for unified telemetry and agentic SDK—moving teams from reactive monitoring to proactive ops. Founder at Last9. Loves building dev tools and listening to The Beatles.

If you’re building high-performance systems, Golang has probably earned a spot in your stack. Its speed, lightweight concurrency, and quick compile times make it ideal for scalable APIs, microservices, and distributed systems. But those same qualities that make Go powerful can make performance monitoring tricky. Goroutines run fast and in parallel, which means a simple CPU or memory graph doesn’t always tell you what’s slowing things down.