Database Caching Strategy Designer

Design a caching strategy for this database workload:

**Database System:** {{DATABASE_SYSTEM}}
**Application Stack:** {{APPLICATION_STACK}}
**Hot Data Patterns:** {{HOT_DATA}}
**Query Patterns:** {{QUERY_PATTERNS}}
**Current Load:** {{CURRENT_LOAD}}
**Acceptable Staleness:** {{STALENESS}}

Please provide:
1. Cache layer selection (Redis, Memcached, etc.)
2. Caching patterns:
   - Cache-aside
   - Write-through
   - Write-behind
   - Read-through
3. Cache key design
4. TTL strategies
5. Cache invalidation approaches
6. Cache warming strategies
7. Implementation code examples
8. Monitoring cache effectiveness
9. Handling cache failures
10. Cost-benefit analysis