Linux performanceAbout 3 min read
Separate high CPU, high load, and guest steal
Diagnose a slow fictional report service by separating execution demand, blocked work, scoped budgets, and virtual-machine scheduling.
Read solutionTechnical solutions / Linux performance
Linux performance — Technical solutions
Find a clear diagnosis before you change anything. Each guide explains the symptoms, likely causes, a contextual solution and how to verify the result.
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Linux performanceAbout 3 min read
Distinguish memory pressure, OOM, and useful cache
Explain a fictional service’s memory alarm using availability, reclaim, PSI, scope-specific events, and actual request impact.
Read solutionLinux performanceAbout 4 min read
Distinguish high I/O latency from saturation
Trace a slow synthetic report write across application waits, writeback, filesystem operations, and device queues before changing storage policy.
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