Apache Benchmark centminmod default installation

This is the result of apache benchmark for default centminmod installation with specification below:

target server:
VULTR 4 GB RAM SG region

tester:
VULTR 512 MB RAM SG region

The CPU usage of tester instance is low, and the CPU usage of target server is full, so the probability of bottleneck in tester instance is low. Fyi tester instance can use ~300 Mbps when test the target instance.

[root@mytest ~]# ab -n 15000 -c 1000 http://x.x.x.x/info.php
This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking x.x.x.x (be patient)
Completed 1500 requests
Completed 3000 requests
Completed 4500 requests
Completed 6000 requests
Completed 7500 requests
Completed 9000 requests
Completed 10500 requests
Completed 12000 requests
Completed 13500 requests
Completed 15000 requests
Finished 15000 requests


Server Software:        nginx
Server Hostname:        x.x.x.x
Server Port:            80

Document Path:          /info.php
Document Length:        106140 bytes

Concurrency Level:      1000
Time taken for tests:   40.147 seconds
Complete requests:      15000
Failed requests:        14980
   (Connect: 0, Receive: 0, Length: 14980, Exceptions: 0)
Write errors:           0
Total transferred:      1594607252 bytes
HTML transferred:       1592147252 bytes
Requests per second:    373.62 [#/sec] (mean)
Time per request:       2676.493 [ms] (mean)
Time per request:       2.676 [ms] (mean, across all concurrent requests)
Transfer rate:          38787.91 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    3  14.0      0    1014
Processing:   101 2564 280.7   2577    3439
Waiting:      100 2561 280.4   2574    3437
Total:        143 2567 276.5   2579    3573

Percentage of the requests served within a certain time (ms)
  50%   2579
  66%   2661
  75%   2726
  80%   2756
  90%   2828
  95%   2872
  98%   2953
  99%   3035
 100%   3573 (longest request)
[root@mytest ~]#
[root@mytest ~]# ab -n 15000 -c 1000 http://x.x.x.x/info.php
This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking x.x.x.x (be patient)
Completed 1500 requests
Completed 3000 requests
Completed 4500 requests
Completed 6000 requests
Completed 7500 requests
Completed 9000 requests
Completed 10500 requests
Completed 12000 requests
Completed 13500 requests
Completed 15000 requests
Finished 15000 requests


Server Software:        nginx
Server Hostname:        x.x.x.x
Server Port:            80

Document Path:          /info.php
Document Length:        106140 bytes

Concurrency Level:      1000
Time taken for tests:   42.011 seconds
Complete requests:      15000
Failed requests:        14967
   (Connect: 0, Receive: 0, Length: 14967, Exceptions: 0)
Write errors:           0
Total transferred:      1594607264 bytes
HTML transferred:       1592147264 bytes
Requests per second:    357.05 [#/sec] (mean)
Time per request:       2800.724 [ms] (mean)
Time per request:       2.801 [ms] (mean, across all concurrent requests)
Transfer rate:          37067.41 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    3   6.0      0      30
Processing:   160 2690 306.9   2691    4640
Waiting:      156 2686 306.3   2688    4639
Total:        189 2692 303.1   2692    4640

Percentage of the requests served within a certain time (ms)
  50%   2692
  66%   2798
  75%   2877
  80%   2898
  90%   2976
  95%   3032
  98%   3083
  99%   3137
 100%   4640 (longest request)