我正在以下设置上测试我的新站点 * 2 个 m1.large ec2 实例作为弹性负载均衡器后面的 Web 服务器 * 两个 Web 服务器都安装了 memcache/apc/nginx/php-fpm * 1 个 m1.large ec2 实例用于 mongo db我从远程服务器运行它,
ab -n 100 http://beta.domain.com/
我得到以下结果
Server Software: nginx/1.1.19
Server Hostname: beta.domain.com
Server Port: 80
Document Path: /
Document Length: 50817 bytes
Concurrency Level: 1
Time taken for tests: 127.032 seconds
Complete requests: 100
Failed requests: 0
Write errors: 0
Total transferred: 5117100 bytes
HTML transferred: 5081700 bytes
Requests per second: 0.79 [#/sec] (mean)
Time per request: 1270.322 [ms] (mean)
Time per request: 1270.322 [ms] (mean, across all concurrent requests)
Transfer rate: 39.34 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 21 42 100.4 26 1018
Processing: 1119 1228 69.4 1218 1488
Waiting: 941 1016 41.8 1015 1159
Total: 1144 1270 121.6 1246 2199
Percentage of the requests served within a certain time (ms)
50% 1246
66% 1271
75% 1281
80% 1295
90% 1364
95% 1483
98% 1547
99% 2199
100% 2199 (longest request)
APC命中率在98%左右。此外,我在进行此测试时正在检查 memcached 日志文件,我可以看到 ab 正在访问两台服务器并访问 memcached 上的值(全部命中,没有未命中)。但 RPS 值仍然是 0.79。这不是很低吗?我错过了这里的重点吗?
编辑
此外,所有静态内容(css、js、图像)都从 Amazon S3 以 gz 格式提供,并且有 1 年的到期日期。
*编辑 2 *
我用参数运行了相同的测试,-c 50
结果如下
Concurrency Level: 50
Time taken for tests: 49.332 seconds
Complete requests: 100
Failed requests: 0
Write errors: 0
Total transferred: 5118200 bytes
HTML transferred: 5082800 bytes
Requests per second: 2.03 [#/sec] (mean)
Time per request: 24666.145 [ms] (mean)
Time per request: 493.323 [ms] (mean, across all concurrent requests)
Transfer rate: 101.32 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 20 33 10.0 30 58
Processing: 7656 20521 6139.1 21495 29328
Waiting: 7538 20415 6131.9 21407 29243
Total: 7687 20554 6140.3 21540 29380
Percentage of the requests served within a certain time (ms)
50% 21540
66% 23255
75% 25744
80% 26204
90% 27414
95% 28098
98% 29259
99% 29380
100% 29380 (longest request)
** 负载生成 **
我猜ab是这样做的,不是吗?抱歉,我对基准测试很陌生 :) 我还添加-c 50
并再次运行了测试。见上面的结果。
** 测试页面 **
此页面列出了 20 个带有图像、描述等的产品。进行一些后端计算,但结果都缓存在 memcache 中,因此它实际上从未命中数据库 (mongo)。我可以从 memcache 日志文件中看到这一点。
** 还有什么 **
这是vmstat
ab 测试期间在其中一台服务器上的结果
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 7161224 21028 199896 0 0 26 16 29 30 1 0 99 0
和iostat
Linux 3.2.0-29-virtual 10/02/2012 _x86_64_ (2 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
0.67 0.00 0.31 0.15 0.34 98.54
Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
xvdap1 4.25 48.00 32.40 178001 120160
xvdb 0.17 0.54 0.00 1993 4