MongoDB Tutorial 0/120 lessons ~6 min read Lesson 72
Memory Optimization
MongoDB lives or dies by working set in RAM.
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Focus
2 guided sections
Practice signal
Examples included
Career prep
Foundation builder
Introduction
MongoDB lives or dies by working set in RAM. If your hot indexes + frequently accessed docs fit in memory, queries fly. If they spill to disk, latency explodes.
Best practices
- Size RAM to fit indexes + working set.
- Use
db.serverStatus().wiredTigerto see cache stats.
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