QABattle

Performance / Scenario

The 12-Hour Leak

Under constant load, heap and connections creep up for hours until an OOM restart. Read the trend and name the leaks.

Difficulty
Boss
Format
Scenario
Points
300
Estimate
20 min

// MISSION BRIEF

Your Mission

The system is perfect for ten minutes and dies at hour eleven. A soak test held steady load for 12 hours and watched memory climb from 400MB to 3.6GB and connections crawl from 20 to 190 before an out-of-memory restart.

Load is constant, so the only variable is time. Read the trend, find both leaks, and state the pass/fail signal a soak test should use.

// FIRST CONTACT

Battle teaser

First artifact

12-hour soak at steady 500 RPS

Under constant load, heap grows 400MB -> 3.6GB and connections 20 -> 190 until OOM. This is:

  1. ANormal warm-up that never ends
  2. BSimply insufficient RAM for the workload
  3. CThe database being slow
  4. DA resource leak (memory + connections) that only a long-running soak reveals, not a peak-load problem
Answers, scoring, hints, and the full battle stay sealed.

// SKILL TAGS

performancesoakmemory-leakendurance