Rya*_*yan 1 linux unix performance centos apache-2.2
我的一台 Web 服务器响应非常缓慢。即使是简单的unix命令。你能帮我指出正确的调试方向吗？
这是一个疯狂的例子：
# cat /dev/null
此命令（打印空白文件）需要将近 5 秒才能到达下一个提示。类似的经历ls。
这是顶部的顶部：
top - 00:32:30 up 6:27, 4 users, load average: 31.94, 26.82, 29.84
Tasks: 134 total, 16 running, 118 sleeping, 0 stopped, 0 zombie
Cpu(s): 91.6%us, 7.0%sy, 0.0%ni, 0.1%id, 0.0%wa, 0.0%hi, 0.3%si, 1.0%st
Mem: 8388608k total, 4243908k used, 4144700k free, 66700k buffers
Swap: 16777208k total, 0k used, 16777208k free, 779636k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
13068 mysql 15 0 1693m 528m 3552 S 24.2 6.5 43:10.37 mysqld
28772 apache 16 0 292m 27m 4300 R 20.4 0.3 0:11.66 httpd
28795 apache 15 0 275m 11m 4256 S 18.5 0.1 0:05.34 httpd
28745 apache 16 0 275m 11m 4284 R 18.2 0.1 0:20.09 httpd
28718 apache 16 0 274m 9740 4288 S 17.9 0.1 0:23.50 httpd
28031 apache 15 0 274m 9796 4348 S 17.3 0.1 0:57.84 httpd
28173 apache 16 0 292m 27m 4400 R 17.0 0.3 0:55.82 httpd
28703 apache 15 0 274m 9820 4368 S 16.7 0.1 0:35.18 httpd
28720 apache 15 0 275m 10m 4288 S 16.7 0.1 0:33.21 httpd
28785 apache 15 0 277m 13m 4260 S 16.0 0.2 0:08.30 httpd
28794 apache 16 0 292m 27m 4292 R 16.0 0.3 0:07.62 httpd
27376 apache 15 0 275m 11m 4364 S 15.7 0.1 2:22.49 httpd
27926 apache 15 0 292m 27m 4384 S 15.7 0.3 1:08.49 httpd
28742 apache 15 0 275m 10m 4300 S 15.7 0.1 0:17.28 httpd
28852 apache 15 0 275m 10m 4260 S 15.7 0.1 0:02.97 httpd
28819 apache 16 0 292m 27m 4272 R 14.8 0.3 0:03.49 httpd
28766 apache 16 0 291m 26m 4312 R 14.5 0.3 0:14.80 httpd
27900 apache 16 0 292m 27m 4328 R 13.8 0.3 1:18.57 httpd
28753 apache 16 0 288m 23m 4312 R 12.9 0.3 0:14.48 httpd
28787 apache 15 0 283m 18m 4304 S 12.3 0.2 0:05.92 httpd
28710 apache 15 0 275m 11m 4296 S 11.0 0.1 0:25.54 httpd
28759 apache 16 0 287m 22m 4296 R 10.1 0.3 0:15.86 httpd
28771 apache 16 0 284m 19m 4296 R 9.4 0.2 0:07.53 httpd
28655 apache 16 0 284m 19m 4352 R 8.2 0.2 0:35.88 httpd
28021 apache 16 0 285m 20m 4376 R 7.9 0.2 0:44.29 httpd
27887 apache 16 0 280m 16m 4380 R 3.1 0.2 1:17.57 httpd
28634 apache 15 0 275m 11m 4372 S 3.1 0.1 0:38.07 httpd
28757 apache 16 0 280m 14m 4300 R 2.8 0.2 0:10.72 httpd
28784 apache 16 0 279m 13m 4292 R 1.9 0.2 0:08.51 httpd
28773 apache 15 0 275m 10m 4256 S 1.3 0.1 0:07.74 httpd
28115 apache 16 0 280m 13m 4368 R 0.9 0.2 1:01.66 httpd
28265 apache 15 0 280m 13m 4400 S 0.9 0.2 0:55.65 httpd