效率,基准测试,速度测试,性能

Question

我正在尝试编写一个我试图测量其效率的脚本.我有一些问题:-

1. 对于小型应用程序,是否需要这种分析？还是我变得偏执？(假设大多数代码效率很高/没有无限循环)
2. 反对我应该对此进行基准测试？我应该比较什么？
3. 以下是我从ab获得的效率输出.这样太过分了吗？我是否正朝着设计此应用程序的错误方向前进？我应该注意哪些警告信号？

abs -n10000 -c100 http://localhost/testapp

This is ApacheBench, Version 2.3 
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking localhost (be patient)
Completed 1000 requests
Completed 2000 requests
Completed 3000 requests
Completed 4000 requests
Completed 5000 requests
Completed 6000 requests
Completed 7000 requests
Completed 8000 requests
Completed 9000 requests
Completed 10000 requests
Finished 10000 requests


Server Software:        Apache/2.2.10
Server Hostname:        localhost
Server Port:            80

Document Path:          /testapp
Document Length:        525 bytes

Concurrency Level:      100
Time taken for tests:   33.608 seconds
Complete requests:      10000
Failed requests:        5179
   (Connect: 0, Receive: 0, Length: 5179, Exceptions: 0)
Write errors:           0
Total transferred:      6973890 bytes
HTML transferred:       5253890 bytes
Requests per second:    297.55 [#/sec] (mean)
Time per request:       336.080 [ms] (mean)
Time per request:       3.361 [ms] (mean, across all concurrent requests)
Transfer rate:          202.64 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    1   1.5      0     109
Processing:     8  334 403.9    176    3556
Waiting:        7  334 403.9    176    3556
Total:          9  335 403.8    177    3556

Percentage of the requests served within a certain time (ms)
  50%    177
  66%    296
  75%    415
  80%    519
  90%    842
  95%   1141
  98%   1615
  99%   1966
 100%   3556 (longest request)

我正在使用PHP编写脚本.在进一步测试时,我还发现如果我从PHP脚本中注释MySQL连接部分,"失败请求"将变为0.怎么了？如何降低此故障率？

谢谢你,亚力克

Answer 1

您是否期望100个并发请求？您希望在30秒内收到10K请求吗？

您可以运行此基准测试,但要问问自己这意味着什么.考虑一下您将接收的实际流量.你真的需要一个问题来对照:

• 我希望我的网站有3,000名用户.
• 我希望在高峰期使用时,其中500个将会点击页面
• 通常使用的是一分钟内3个请求: 3 * 500 / 60 = ~ 25 req/sec
• 我的网站可以处理25 req/sec并且响应迅速(每个请求<200ms)吗？

除非您处于网络的前几个百分点,否则您的页面在现实生活中将不会看到100个并发请求.针对该流量级别调整您的网站没有意义.要获得这些数字,您需要在架构级别(数据库使用,缓存方法等)进行设计妥协:因此在数据库启动时您的失败次数.

如果您只是尝试配置脚本,请使用xdebug查找代码花费时间的位置.