Metrics, Logs, Traces, and Audit (Part 3)

<p>In Part 3, we separated signals on purpose: </p> <ul> <li> <strong>metrics</strong> tell you <em>where to look</em> </li> <li> <strong>logs and traces</strong> tell you

<p>If you’ve spent any time modernizing a Java-based microservices architecture recently, you’ve likely hit the "Observability Wall." The ecosystem is drowning in tools. We hear

<p>Three weeks ago someone on the AWS Builders Slack posted something that stopped me cold. Their production AI agent had been running for six hours. CPU normal. Memory stable.

<p>Short answer: for a small SaaS notification service, the best inexpensive logging choice is the one that preserves enough evidence to reconstruct a failed delivery without

<blockquote> <p><strong>How this piece came together.</strong> A Zenn writing contest put OpenTelemetry back on my radar, and this is the record of learning it by doing — picking