midCaching
Explain LFU (Least Frequently Used) eviction policy.
Updated Apr 28, 2026
Short answer
Removes items that are accessed least often, regardless of how recently they were used.
Deep explanation
Intermediate caching involves choosing strategies that balance speed with data accuracy. Removes items that are accessed least often, regardless of how recently they were used.
Real-world example
Using Redis to store session data across a cluster of web servers.
Common mistakes
- Using Write-Back caching for critical financial data without a robust safety net for data loss.
Follow-up questions
- What is a 304 HTTP code?