>>196に負けて悔しかったので
FreeBSD 5.3から whitebox に変えてみた。
OS whitebox
CPU：Opteron148 MEM：2GB 1G×2 (PC3200) Registered ECC
HDD WD Raptor (10000rpm) ×2 RAID1

デフォルト設定

Server Software: Apache/1.3.33
Server Hostname: localhost
Server Port: 80
Document Path: /index.html.en
Document Length: 1456 bytes

Concurrency Level: 10
Time taken for tests: 1.302 seconds
Complete requests: 10000
Failed requests: 0
Broken pipe errors: 0
Total transferred: 17273454 bytes
HTML transferred: 14562912 bytes
Requests per second: 7680.49 [#/sec] (mean)
Time per request: 1.30 [ms] (mean)
Time per request: 0.13 [ms] (mean, across all concurrent requests)
Transfer rate: 13266.86 [Kbytes/sec] received