Performance Engineering and Optimization

  1. Fundamental Concepts and Metrics
    1. Core Performance Metrics
      1. Latency and Response Time
        1. Average Latency
          1. Tail Latency
            1. End-to-End Latency
              1. Network Latency
              2. Throughput
                1. Transactions Per Second
                  1. Requests Per Second
                    1. Peak Throughput
                      1. Sustained Throughput
                      2. Concurrency
                        1. Concurrent Users
                          1. Concurrent Requests
                            1. Maximum Supported Concurrency
                              1. Session Management
                              2. Resource Utilization
                                1. CPU Usage
                                  1. CPU Saturation
                                    1. CPU Steal Time
                                      1. Context Switching
                                      2. Memory Usage
                                        1. Memory Leaks
                                          1. Memory Fragmentation
                                            1. Garbage Collection Impact
                                            2. Disk I/O
                                              1. Read Latency
                                                1. Write Latency
                                                  1. IOPS
                                                    1. Queue Depth
                                                    2. Network I/O
                                                      1. Bandwidth Utilization
                                                        1. Packet Loss
                                                          1. Retransmissions
                                                            1. Connection Pooling Efficiency
                                                          2. Error Rate
                                                            1. Application Errors
                                                              1. System Errors
                                                                1. Timeout Errors
                                                                  1. HTTP Status Code Distribution
                                                                  2. Availability Metrics
                                                                    1. Uptime Percentage
                                                                      1. Mean Time Between Failures
                                                                        1. Mean Time to Recovery
                                                                      2. Key Performance Indicators
                                                                        1. Defining KPIs
                                                                          1. Aligning KPIs with Business Goals
                                                                            1. Technical vs Business KPIs
                                                                              1. KPI Measurement and Tracking
                                                                              2. Service Level Objectives and Agreements
                                                                                1. SLO Definition and Measurement
                                                                                  1. SLA Enforcement and Penalties
                                                                                    1. Error Budgets
                                                                                      1. SLI Selection and Implementation
                                                                                      2. Statistical Concepts in Performance
                                                                                        1. Understanding Percentiles
                                                                                          1. p50 (Median)
                                                                                            1. p90
                                                                                              1. p95
                                                                                                1. p99
                                                                                                  1. p99.9
                                                                                                  2. Calculating and Interpreting Percentiles
                                                                                                    1. Distribution Analysis
                                                                                                      1. Outlier Detection
                                                                                                      2. Performance Laws and Principles
                                                                                                        1. Little's Law
                                                                                                          1. Formula and Application
                                                                                                            1. Limitations and Assumptions
                                                                                                            2. Amdahl's Law
                                                                                                              1. Formula and Application
                                                                                                                1. Implications for Parallelization
                                                                                                                2. Universal Scalability Law
                                                                                                                  1. Formula and Parameters
                                                                                                                    1. Practical Use Cases
                                                                                                                    2. Gustafson's Law
                                                                                                                      1. Queueing Theory Fundamentals

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                                                                                                                    1. Introduction to Performance Engineering

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                                                                                                                    3. Performance Engineering in the Software Development Lifecycle