Redis memory exhaustion causes complete API failure

Redis cluster runs out of memory, causing API error rates to spike from 0.1% baseline to 100% within 60 seconds, resulting in complete service failure and 14,000 failed transactions over 3 hours

Check Redis cluster memory status immediately. Clear Redis cluster to restore service. Post-recovery: implement proactive Redis memory monitoring and alerting, configure maxmemory limits and eviction policies, investigate memory leak or unbounded growth patterns, review application Redis usage for optimization