Developer To Architect

Performance

Measure of how fast or responsive a system is under

• A given workload: Backend data, Request volume
• A given hardware: Kind, Capacity

How to spot a performance problem?

Every performance problem is the result of some queue building somewhere.

• Network socket queue, DB IO queue, OS run queue etc
• Reasons for queue build-up: Inefficient slow processing, Serial resource access, Limited resource capacity

Performance Principles

• Efficiency: Efficient Resource Utilization: IO (Memory, Network, Disk), CPU
• Efficient Logic: Algorithm, DB Queries
• Efficient Data Storage: Data Structures, DB Schema
• Caching
• Concurrency: Hardware, Software (Queuing, Coherence)
• Capacity