server optimization issue

Hello

I have server (Dual Xeon 3.06, 2G RAM, 2 x 120 GB Hard Drive) and am
curious, if it's configured propertly. Almost all the time, "top" gives me
350% - 390% idle, while "average load" ranges from 1 (night, low loadings)
to 10 (business time, high loadings).

I tried to tune apache and increased number of threads but it didn't help.
What could cause such a big "average load" while CPUs are almost idle and
what system parameters could be optimized?

And, second question, is it ok, that "top" process takes itself 15% of CPU
time.

Below I have listed output of "top". Any thoughs would be very appreciated.
Thanks in advance.

"top" output:

Code: 
# top
 22:04:09  up 13 days, 15:14,  9 users,  load average: 0.75, 1.08, 1.36
290 processes: 283 sleeping, 1 running, 3 zombie, 3 stopped
CPU states:  cpu    user    nice  system    irq  softirq  iowait    idle
           total    8.8%    0.0%   15.6%   0.0%     0.0%    0.0%  374.8%
           cpu00    1.6%    0.0%    0.8%   0.0%     0.0%    0.0%   97.5%
           cpu01    3.3%    0.0%    0.8%   0.0%     0.0%    0.0%   95.8%
           cpu02    0.0%    0.0%    0.0%   0.0%     0.0%    0.0%  100.0%
           cpu03    4.1%    0.0%   14.1%   0.0%     0.0%    0.0%   81.6%
Mem:  2068176k av, 1973448k used,   94728k free,       0k shrd,  161820k
buff
       684396k active,            1125064k inactive
Swap: 2096472k av,   86868k used, 2009604k free                 1168384k
cached

  PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME CPU COMMAND
 7548 root      17   0  1420 1420   856 R    16.6  0.0   0:00   3
 4109 root      16   0 34288  33M 34204 S     6.6  1.6   0:31   0 httpd
30322 root      15   0  1400 1400   496 S     0.8  0.0   0:05   1 exclog
    1 root      16   0   396  372   340 S     0.0  0.0   0:27   2 init
    2 root      RT   0     0    0     0 SW    0.0  0.0   0:00   0 swapper
    3 root      RT   0     0    0     0 SW    0.0  0.0   0:00   1 swapper
    4 root      RT   0     0    0     0 SW    0.0  0.0   0:00   2 swapper

 

 

 

 

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