Episode 105 — Memory pressure: swapping, OOM, killed processes, memory leaks

Linux+ includes memory pressure because it produces symptoms that mimic application bugs, random crashes, and performance degradation, and administrators must recognize the pattern quickly. This episode explains swapping as the system’s way of extending memory using disk-backed pages, and why heavy swapping often indicates that the workload exceeds available RAM or that memory is fragmented by competing processes. You’ll learn how the Out-Of-Memory (OOM) mechanism protects system stability by terminating processes when memory cannot be reclaimed, and how exam prompts may describe “killed” processes or sudden service exits as evidence of OOM conditions. We also introduce memory leaks as a behavior pattern where a process’s memory use grows over time without being released, creating gradual degradation that can culminate in swapping storms or OOM events.

we apply memory pressure concepts to troubleshooting and best practices. You’ll practice distinguishing transient spikes from sustained leaks by looking at trends and correlating events with workload changes, not just reading one snapshot metric. We also cover operational decisions: when to restart a leaking service, when to tune limits and resource allocations, and when to investigate deeper root causes like misbehaving dependencies or runaway caching behavior. Finally, you’ll learn exam-aligned safety habits: avoid “fixing” by disabling swap without understanding impact, confirm which process was killed and why, and validate recovery by observing that swap usage and memory pressure stabilize after remediation, so your system returns to predictable performance rather than repeating the same failure cycle. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with.