server.max-connections = 1024
server.max-keep-alive-idle = 5
server.max-keep-alive-requests = 16
 

$ ab -n 12000 -c 131   http://somehost/
This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
...
Server Software:        lighttpd/1.4.32
Server Hostname:        somehost
Server Port:            80

Document Path:          /
Document Length:        14 bytes

Concurrency Level:      131
Time taken for tests:   3.189 seconds
Complete requests:      12000
Failed requests:        0
Write errors:           0
Total transferred:      2964000 bytes
HTML transferred:       168000 bytes
Requests per second:    3762.41 [#/sec] (mean)
Time per request:       34.818 [ms] (mean)
Time per request:       0.266 [ms] (mean, across all concurrent requests)
Transfer rate:          907.54 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.7      0      13
Processing:     5   33  12.7     32     837
Waiting:        5   33  12.6     32     837
Total:         11   33  12.7     32     837

Percentage of the requests served within a certain time (ms)
  50%     32
  66%     33
  75%     33
  80%     33
  90%     34
  95%     36
  98%     41
  99%     42
 100%    837 (longest request)



$ ab -n 12000 -c 132   http://somehost/
...

Server Software:        lighttpd/1.4.32
Server Hostname:        somehost
Server Port:            80

Document Path:          /
Document Length:        14 bytes

Concurrency Level:      132
Time taken for tests:   3.210 seconds
Complete requests:      12000
Failed requests:        0
Write errors:           0
Total transferred:      2964000 bytes
HTML transferred:       168000 bytes
Requests per second:    3738.32 [#/sec] (mean)
Time per request:       35.310 [ms] (mean)
Time per request:       0.268 [ms] (mean, across all concurrent requests)
Transfer rate:          901.72 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0  12.9      0    1002
Processing:     2   33  12.9     32     837
Waiting:        2   33  12.9     32     836
Total:         12   33  18.2     32    1035

Percentage of the requests served within a certain time (ms)
  50%     32
  66%     33
  75%     33
  80%     33
  90%     34
  95%     37
  98%     38
  99%     39
 100%   1035 (longest request)


$ ab -n 12000 -c 167  -k http://somehost/
...

Server Software:        lighttpd/1.4.32
Server Hostname:        somehost
Server Port:            80

Document Path:          /
Document Length:        14 bytes

Concurrency Level:      167
Time taken for tests:   1.524 seconds
Complete requests:      12000
Failed requests:        0
Write errors:           0
Keep-Alive requests:    11376
Total transferred:      3020880 bytes
HTML transferred:       168000 bytes
Requests per second:    7874.72 [#/sec] (mean)
Time per request:       21.207 [ms] (mean)
Time per request:       0.127 [ms] (mean, across all concurrent requests)
Transfer rate:          1935.92 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    1  34.2      0    1002
Processing:     0   20   6.0     18     220
Waiting:        0   20   6.0     18     220
Total:          0   21  34.4     18    1020

Percentage of the requests served within a certain time (ms)
  50%     18
  66%     19
  75%     20
  80%     21
  90%     27
  95%     31
  98%     35
  99%     40
 100%   1020 (longest request)
$ ab -n 12000 -c 166  -k http://somehost/
...

Server Software:        lighttpd/1.4.32
Server Hostname:        somehost
Server Port:            80

Document Path:          /
Document Length:        14 bytes

Concurrency Level:      166
Time taken for tests:   1.501 seconds
Complete requests:      12000
Failed requests:        0
Write errors:           0
Keep-Alive requests:    11336
Total transferred:      3020680 bytes
HTML transferred:       168000 bytes
Requests per second:    7995.17 [#/sec] (mean)
Time per request:       20.763 [ms] (mean)
Time per request:       0.125 [ms] (mean, across all concurrent requests)
Transfer rate:          1965.40 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   1.0      0      18
Processing:     0   20   5.9     19      59
Waiting:        0   20   5.9     19      59
Total:          0   20   6.0     19      59

Percentage of the requests served within a certain time (ms)
  50%     19
  66%     19
  75%     19
  80%     20
  90%     27
  95%     33
  98%     41
  99%     48
 100%     59 (longest request)