⚡ Performance & Monitoring
Caching
Caching strategies using Redis and in-memory caching.
Redis Configuration
REDIS_ENABLED=true
REDIS_URL=redis://localhost:6379Cache Layers
| Layer | Scope | TTL | Use Case |
|---|---|---|---|
| In-memory | Per-instance | Short (1-5 min) | Frequently accessed configs |
| Redis | Shared | Medium (5-60 min) | Session data, computed results |
| Response | Per-request | Varies | HTTP cache headers |
NestJS Cache Manager
@Injectable()
export class EmployeeService {
constructor(@Inject(CACHE_MANAGER) private cacheManager: Cache) {}
async getEmployee(id: string): Promise<IEmployee> {
const cacheKey = `employee:${id}`;
const cached = await this.cacheManager.get<IEmployee>(cacheKey);
if (cached) return cached;
const employee = await this.repository.findOne(id);
await this.cacheManager.set(cacheKey, employee, 300); // 5 min TTL
return employee;
}
}Cache Invalidation
Invalidate on mutations:
async updateEmployee(id: string, input: UpdateEmployeeDTO) {
const result = await this.repository.update(id, input);
await this.cacheManager.del(`employee:${id}`);
return result;
}