前边提到我们扣库存时要考虑竞态条件,我们这里是使用 Channel 避免并发的读写,保证了请求的高效顺序执行。我们将接口的返回信息写入到了 ./stat.log 文件方便做压测统计。
单机服务压测
开启服务,我们使用 AB 压测工具进行测试:
ab -n 10000 -c 100 http://127.0.0.1:3005/buy/ticket
下面是我本地低配 Mac 的压测信息:
This is ApacheBench, Version 2.3 <$revision: 1826891="">
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)
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:
Server Hostname: 127.0.0.1
Server Port: 3005
Document Path: /buy/ticket
Document Length: 29 bytes
Concurrency Level: 100
Time taken for tests: 2.339 seconds
Complete requests: 10000
Failed requests: 0
Total transferred: 1370000 bytes
HTML transferred: 290000 bytes
Requests per second: 4275.96 [#/sec] (mean)
Time per request: 23.387 [ms] (mean)
Time per request: 0.234 [ms] (mean, across all concurrent requests)
Transfer rate: 572.08 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 8 14.7 6 223
Processing: 2 15 17.6 11 232
Waiting: 1 11 13.5 8 225
Total: 7 23 22.8 18 239
Percentage of the requests served within a certain time (ms)
50% 18
66% 24
75% 26
80% 28
90% 33
95% 39
98% 45
99% 54
100% 239 (longest request)