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简要介绍性能测试的内容，从大框架上认识性能测试的主要目标和测试方法。
1. 性能测试指标
- 响应时间
- 并发数（系统能够同时处理请求的数目）
- 吞吐量（如TPS-每秒处理事务数）
- 性能计数器
2. 性能测试方法
- 性能测试（设计时要求的正常使用的并发请求数压力）
- 负载测试（找到吞吐量峰值，超过峰值后，请求增加，但系统的吞吐量下降）
- 压力测试（找到系统崩溃的临界点）
- 稳定性测试（特定情况下，一段时间内系统运行的稳定性。注意稳定性测试需要不均匀的请求测试）
3. 性能测试报告
- 性能测试报告
| 并发数 | 响应时间(ms) | TPS | 错误率(%) | Load | 内存(GB) | 备注 |
|---|---|---|---|---|---|---|
| 10 | 500 | 20 | 0 | 5 | 8 | 性能测试 |
| 20 | 800 | 30 | 0 | 10 | 10 | 性能测试 |
| 30 | 1000 | 40 | 2 | 15 | 14 | 性能测试 |
| 40 | 1200 | 45 | 20 | 30 | 16 | 负载测试 |
4. 性能优化策略
- 性能分析（定位性能瓶颈）
- 性能优化（-web前端性能优化 -应用服务器性能优化 -存储服务器性能优化）
参考资料：《大型网站技术架构——核心原理与案例分析》（李智慧 著）