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DevOps & observability · #githubactions
Learn how to diagnose and fix GitHub Actions jobs that stay in the 'Queued' state, focusing on runner label mismatches, concurrency bottlenecks, and offline self-hosted agents.
Stop duplicating your GitHub Actions jobs. Learn how to use Matrix Strategies to test across multiple OS and runtime versions efficiently using include, exclude, and fail-fast settings.
actions/cache speeds up GitHub Actions by restoring your package manager's download store between runs — but only if your key includes a lockfile hash.
I run a CI workflow that connects to a PostgreSQL database during integration tests. Occasionally the workflow fails with a connection pool exhaustion error, even though the number of parallel jobs is below the database's max pool size. The workflow executes on GitHub‑hosted Ubuntu runners, which are virtual machines in Azure with a shared network stack. I s