How We Used `valgrind` and `massif` to Pinpoint a 2GB Memory Spike in an

Monorepo CI builds spiked from 3GB to 5GB RAM usage—repeated OOM kills under load.

At PraLabs, our production systems continually generate telemetry that reveals counter-intuitive bottlenecks. In this teardown, we analyze the architectural failure modes behind: Profiling Memory Leaks in Monorepo CI: How We Used `valgrind` and `massif` to Pinpoint a 2GB Memory Spike in an Uncached Build Step.

Core Friction & Resolution: Eliminated 40% peak memory usage in CI builds

Tactical Engineering Implementation: Massif profiling integrated in <15m. We instrument our build, container, and test execution harnesses to verify latency stability before code reaches trunk.

Architectural Axiom: Optimize for deterministic failure containment and actionable telemetry over synthetic complexity.