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3 articles matching your filters

Database Intermediate

PostgreSQL Index Strategy That Actually Works

Most "PostgreSQL is slow" tickets are an indexing problem, and most indexing problems come from adding indexes by intuition rather than by reading the plan. This is the method I use, and the specific index types that sol...

28 Jun 2026 6 min read 6K

VoIP Intermediate

Diagnosing VoIP Call Quality Properly

"The calls are bad" is the least actionable ticket in unified communications. Bad how? For whom? In which direction? Almost every VoIP quality investigation that drags on for weeks does so because nobody separated the sy...

13 Jun 2026 6 min read 3K

Linux Intermediate

systemd Service Hardening

Most Linux services run with far more privilege than they need. systemd includes a sandboxing framework that removes most of it declaratively — no container runtime, no separate tooling, just directives in a unit file. T...

22 May 2026 5 min read 4K