因此，我一直在尝试使用 apache ab 来对性能进行基准测试，但我不明白为什么会得到这些结果。仅供参考，它是一个使用 Zend Framework、mySQL 数据库和大多数默认 httpd.conf 设置的 PHP 应用程序。如果我设置一个 1 个并发用户和 10 个请求的简单测试，它似乎与 10 个并发用户和 10 个请求一样需要运行很长时间，就像它基本上只是一次运行一个请求一样。我使用“top”来监控 CPU 和 RAM 使用情况，在并发级别为 10 的情况下，它徘徊在 50% 左右，并且 RAM 没有进行交换，我还有大约 400MB 的可用空间。我还检查了 httpd.conf 文件，最大客户端是默认值 256。
-c 1 -n 10
Concurrency Level: 1
Time taken for tests: 11.594 seconds
Complete requests: 10
Failed requests: 0
Write errors: 0
Keep-Alive requests: 0
Total transferred: 738770 bytes
HTML transferred: 735680 bytes
Requests per second: 0.86 [#/sec] (mean)
Time per request: 1159.353 [ms] (mean)
Time per request: 1159.353 [ms] (mean, across all concurrent requests)
Transfer rate: 62.23 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.1 0 0
Processing: 1126 1159 21.7 1168 1190
Waiting: 1094 1128 22.7 1138 1160
Total: 1126 1159 21.7 1168 1190
Percentage of the requests served within a certain time (ms)
50% 1168
66% 1171
75% 1172
80% 1178
90% 1190
95% 1190
98% 1190
99% 1190
100% 1190 (longest request)
-c 10 -n 10
Concurrency Level: 10
Time taken for tests: 11.409 seconds
Complete requests: 10
Failed requests: 0
Write errors: 0
Keep-Alive requests: 0
Total transferred: 738770 bytes
HTML transferred: 735680 bytes
Requests per second: 0.88 [#/sec] (mean)
Time per request: 11408.835 [ms] (mean)
Time per request: 1140.883 [ms] (mean, across all concurrent requests)
Transfer rate: 63.24 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 2 18 9.8 16 30
Processing: 1429 6316 3330.1 6821 11399
Waiting: 1388 6270 3330.7 6761 11353
Total: 1445 6334 3331.7 6823 11408
Percentage of the requests served within a certain time (ms)
50% 6823
66% 7877
75% 9069
80% 10185
90% 11408
95% 11408
98% 11408
99% 11408
100% 11408 (longest request)