动态页面的顺序测试用例

动态页面的顺序测试用例


在本章中,我们将描述-n-c的各种组合以及重要标志,以逐渐增加 Web 服务器的负载。

您应该主要关注以下指标如何随着负载的增加而变化 –

  • 每秒请求数
  • 连接时间(毫秒)
  • 特定时间内服务请求的百分比(毫秒)

当服务器开始卡住并且您开始收到失败的请求时,您还应该注意阈值。

1 个并发用户执行 100 个页面点击

让我们由单个用户执行 100 个连续页面加载 –

$ ab -l -r -n 100 -c 1 -k -H "Accept-Encoding: gzip, deflate"  http://127.0.0.1:8000/

输出

This is ApacheBench, Version 2.3 <$Revision: 1604373 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 127.0.0.1 (be patient).....done


Server Software:        Rocket
Server Hostname:        127.0.0.1
Server Port:            8000

Document Path:          /
Document Length:        Variable

Concurrency Level:      1
Time taken for tests:   0.045 seconds
Complete requests:      100
Failed requests:        0
Non-2xx responses:      100
Keep-Alive requests:    0
Total transferred:      27700 bytes
HTML transferred:       6600 bytes
Requests per second:    2206.24 [#/sec] (mean)
Time per request:       0.453 [ms] (mean)
Time per request:       0.453 [ms] (mean, across all concurrent requests)
Transfer rate:          596.80 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.0      0       0
Processing:     0    0   0.0      0       0
Waiting:        0    0   0.0      0       0
Total:          0    0   0.0      0       1

Percentage of the requests served within a certain time (ms)
  50%      0
  66%      0
  75%      0
  80%      0
  90%      1
  95%      1
  98%      1
  99%      1
 100%      1 (longest request)

5 个并发用户,每个用户执行 10 次页面点击

这种情况对应于网站上的峰值负载,每月点击量超过 50,000 次。

$ ab -l -r -n 10 -c 5 -k -H "Accept-Encoding: gzip, deflate"  http://127.0.0.1:8000/

在以下后续输出中,为了清晰起见,我们将省略通用标题。

输出

...
Requests per second:    2009.24 [#/sec] (mean)
Time per request:       2.488 [ms] (mean)
Time per request:       0.498 [ms] (mean, across all concurrent requests)
Transfer rate:          543.52 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    1   0.5      1       2
Processing:     0    1   0.5      1       2
Waiting:        0    1   0.5      1       1
Total:          2    2   0.4      3       3
ERROR: The median and mean for the total time are more than twice the standard
       deviation apart. These results are NOT reliable.

Percentage of the requests served within a certain time (ms)
  50%      3
  66%      3
  75%      3
  80%      3
  90%      3
  95%      3
  98%      3
  99%      3
 100%      3 (longest request)

10 个并发用户,每个用户点击 10 次页面

此测试对应 10 个不同并发用户加载 100 个页面,每个用户执行 10 个连续页面加载。

$ ab  -r -n 10 -c 10 -k -H "Accept-Encoding: gzip, deflate"  http://127.0.0.1:8000/

输出

...
Requests per second:    2225.68 [#/sec] (mean)
Time per request:       4.493 [ms] (mean)
Time per request:       0.449 [ms] (mean, across all concurrent requests)
Transfer rate:          602.07 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        1    2   0.7      2       3
Processing:     0    2   1.0      2       3
Waiting:        0    1   1.0      2       3
Total:          4    4   0.3      4       4
WARNING: The median and mean for the waiting time are not within a normal deviation
        These results are probably not that reliable.

Percentage of the requests served within a certain time (ms)
  50%      4
  66%      4
  75%      4
  80%      4
  90%      4
  95%      4
  98%      4
  99%      4
 100%      4 (longest request)

20 个并发用户,每个用户进行 20 次页面点击

此测试对应 20 个不同并发用户加载 400 个页面,每个用户执行 20 个连续页面加载。

$ ab -r -n 20 -c 20 -k -H “Accept-Encoding: gzip, deflate” http://127.0.0.1:8000/

输出

...
Requests per second:    1619.96 [#/sec] (mean)
Time per request:       12.346 [ms] (mean)
Time per request:       0.617 [ms] (mean, across all concurrent requests)
Transfer rate:          438.21 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        2    6   2.3      6      10
Processing:     1    5   2.9      5      10
Waiting:        0    5   2.9      5       9
Total:         10   11   0.6     11      12

Percentage of the requests served within a certain time (ms)
  50%     11
  66%     11
  75%     12
  80%     12
  90%     12
  95%     12
  98%     12
  99%     12
 100%     12 (longest request)
 

30 个并发用户,每个用户点击 30 次页面

此测试对应 30 个不同并发用户加载 900 个页面,每个用户执行 30 个连续页面加载。

$ ab  -r -n 30 -c 30 -k -H "Accept-Encoding: gzip, deflate"  http://127.0.0.1:8000/

输出

...
Requests per second:    2283.45 [#/sec] (mean)
Time per request:       13.138 [ms] (mean)
Time per request:       0.438 [ms] (mean, across all concurrent requests)
Transfer rate:          617.69 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        2    6   2.7      6      11
Processing:     1    6   3.1      6      11
Waiting:        0    5   3.2      5      10
Total:         11   12   0.5     12      13

Percentage of the requests served within a certain time (ms)
  50%     12
  66%     12
  75%     12
  80%     12
  90%     13
  95%     13
  98%     13
  99%     13
 100%     13 (longest request)

我们现在已经学会了如何逐渐增加网站的负载并测试其性能。

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