Skip the 200MB agent binaries. Here's how to get P95 latency, distributed tracing, and error correlation for your Express API using OpenTelemetry auto-instrumentation and a sub-5KB frontend script.
Actor mailboxes break thread-local trace context. Here's how to propagate spans across Pekko actors in a Play Framework app without losing your mind.
How to wire distributed tracing into gRPC microservices — interceptor-based span propagation, deadline errors that actually tell you something, and streaming RPC traces that don't blow up your cardinality.
Which resolver took 2.8 of your 3-second query? Per-field APM tracing reveals all.
Rust APM tracing with no agent—finally, real observability.
Error tracking catches the crash. Logging tells what happened before. APM shows why it's slow.