amazon ec2-médio pedidos de apache por segundo terrível

Question

EDITED - teste executado a partir de localhost agora para descartar rede ...

Eu tenho um c1.medium usando EBS. Quando eu faço um benchmark do Apache e eu estou apenas imprimindo um "olá" para o teste do localhost - sem hits do banco de dados, é muito lento. Eu posso repetir este teste muitas vezes com os mesmos resultados. Alguma ideia? obrigado antecipadamente.

ab -n 1000 -c 100 http://localhost/home/test/

Benchmarking localhost (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests


Server Software:        Apache/2.2.23
Server Hostname:        localhost
Server Port:            80

Document Path:          /home/test/
Document Length:        5 bytes

Concurrency Level:      100
Time taken for tests:   25.300 seconds
Complete requests:      1000
Failed requests:        0
Write errors:           0
Total transferred:      816000 bytes
HTML transferred:       5000 bytes
Requests per second:    39.53 [#/sec] (mean)
Time per request:       2530.037 [ms] (mean)
Time per request:       25.300 [ms] (mean, across all concurrent requests)
Transfer rate:          31.50 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    7  21.0      0      73
Processing:    81 2489 665.7   2500    4057
Waiting:       80 2443 654.0   2445    4057
Total:         85 2496 653.5   2500    4057

Percentage of the requests served within a certain time (ms)
  50%   2500
  66%   2651
  75%   2842
  80%   2932
  90%   3301
  95%   3506
  98%   3762
  99%   3838
 100%   4057 (longest request)