Why there are so many failed requests in my cake site?

Hi Cakes,
Today I use ab to give a test of my cake site, there are so many failed requests in the output log. I have no idea how to fix it? Can you give some ideas or suggestions on this? Thanks in advance! The site was deployed on my local machine, so I can eliminate bandwidth factor firstly.

ab -c 10 -t 60 http://www.mysite.com/index
This is ApacheBench, Version 2.0.40-dev <$Revision: 1.146 $> apache-2.0
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright 2006 The Apache Software Foundation, http://www.apache.org/

Benchmarking www.mysite.com (be patient)
Finished 53 requests


Server Software:        Apache/2.2.6
Server Hostname:        www.mysite.com
Server Port:            80

Document Path:          /index
Document Length:        109093 bytes

Concurrency Level:      10
Time taken for tests:   61.296875 seconds
Complete requests:      53
Failed requests:        40
   (Connect: 0, Length: 40, Exceptions: 0)
Write errors:           0
Total transferred:      5804514 bytes
HTML transferred:       5787504 bytes
Requests per second:    0.86 [#/sec] (mean)
Time per request:       11565.448 [ms] (mean)
Time per request:       1156.545 [ms] (mean, across all concurrent requests)
Transfer rate:          92.47 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   2.1      0      15
Processing:  4296 10221 2666.6  10648   16203
Waiting:     4265 10152 2674.7  10585   16031
Total:       4296 10221 2666.2  10648   16203

Percentage of the requests served within a certain time (ms)
  50%  10640
  66%  11750
  75%  12000
  80%  12390
  90%  13343
  95%  14000
  98%  15468
  99%  16203
 100%  16203 (longest request)

 

ab -c 3 -t 60 http://www.mysite.com/index
This is ApacheBench, Version 2.0.40-dev <$Revision: 1.146 $> apache-2.0
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright 2006 The Apache Software Foundation, http://www.apache.org/

Benchmarking www.mysite.com (be patient)
Finished 54 requests


Server Software:        Apache/2.2.6
Server Hostname:        www.mysite.com
Server Port:            80

Document Path:          /index
Document Length:        109094 bytes

Concurrency Level:      3
Time taken for tests:   60.62500 seconds
Complete requests:      54
Failed requests:        30
   (Connect: 0, Length: 30, Exceptions: 0)
Write errors:           0
Total transferred:      5913925 bytes
HTML transferred:       5896600 bytes
Requests per second:    0.90 [#/sec] (mean)
Time per request:       3336.806 [ms] (mean)
Time per request:       1112.269 [ms] (mean, across all concurrent requests)
Transfer rate:          96.15 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   2.9      0      15
Processing:  2344 3235 624.0   3312    4609
Waiting:     2312 3207 618.8   3296    4578
Total:       2359 3236 623.2   3312    4609

Percentage of the requests served within a certain time (ms)
  50%   3312
  66%   3640
  75%   3671
  80%   3734
  90%   3984
  95%   4421
  98%   4484
  99%   4609
 100%   4609 (longest request)

 

ab -c 3 -n 100 http://www.mysite.com/index
This is ApacheBench, Version 2.0.40-dev <$Revision: 1.146 $> apache-2.0
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright 2006 The Apache Software Foundation, http://www.apache.org/

Benchmarking www.mysite.com (be patient).....done


Server Software:        Apache/2.2.6
Server Hostname:        www.mysite.com
Server Port:            80

Document Path:          /index
Document Length:        109094 bytes

Concurrency Level:      3
Time taken for tests:   108.703125 seconds
Complete requests:      100
Failed requests:        46
   (Connect: 0, Length: 46, Exceptions: 0)
Write errors:           0
Total transferred:      10940894 bytes
HTML transferred:       10909394 bytes
Requests per second:    0.92 [#/sec] (mean)
Time per request:       3261.094 [ms] (mean)
Time per request:       1087.031 [ms] (mean, across all concurrent requests)
Transfer rate:          98.29 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   2.1      0      15
Processing:  2250 3240 734.5   3484    4750
Waiting:     2234 3205 733.7   3421    4734
Total:       2250 3241 734.7   3484    4750

Percentage of the requests served within a certain time (ms)
  50%   3484
  66%   3765
  75%   3875
  80%   3968
  90%   4109
  95%   4421
  98%   4703
  99%   4750
 100%   4750 (longest request)

--
Thanks
Joshua

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