Senior LevelMongoDB & Mongoose
How do you tune WiredTiger Cache Size (storage.wiredTiger.engineConfig.cacheSizeGB) for high-concurrency systems?
❓ Interview Prompt: Explain tuning cacheSizeGB, balancing WiredTiger working set RAM vs OS filesystem page cache for I/O.
WiredTiger cache defaults to 50% of RAM minus 1GB. Tuning 'cacheSizeGB' balances active index working sets against filesystem page cache for disk I/O.
Code Implementation Example
typescript
console.log('mongod.conf: storage.wiredTiger.engineConfig.cacheSizeGB = 16');💡WiredTiger cache size configuration.
🎯 Interview Key Takeaway
Tune WiredTiger cache sizes to ensure index working sets fit in RAM while leaving memory for OS filesystem caches.
#cacheSizeGB#WiredTiger Tuning#Performance#Senior
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