HP ProLiant ML115 標準構成 FreeBSD 6.2R jail
portsインストール直後でベンチ取ってみた。

# ab -n 10000 -c 10 http://hostname/

Server Software:        Apache/2.2.6
Server Hostname:        hostname
Server Port:            80

Document Path:          /
Document Length:        1001 bytes

Concurrency Level:      10
Time taken for tests:   15.102493 seconds
Complete requests:      10000
Failed requests:        0
Write errors:           0
Non-2xx responses:      10000
Total transferred:      12820000 bytes
HTML transferred:       10010000 bytes
Requests per second:    662.14 [#/sec] (mean)
Time per request:       15.102 [ms] (mean)
Time per request:       1.510 [ms] (mean, across all concurrent requests)
Transfer rate:          828.94 [Kbytes/sec] received

jail取っ払ってチューニングすれば全然違う結果になりそうやね。