httpd increasing server load.

Hello All,

I am using redhat 7.2 with apache 1.3.27 running on it. From last few days I
am seeing that server load on my server increases drastically and again
comes down to normal after some time. When I checked the running processes I
found user nobody consuming maximum resources on my server. Is there anyway
to trace out what makes the server load goes up and who is executing that
process?

USER       PID %CPU %MEM   VSZ  RSS TTY      STAT START   TIME COMMAND
nobody   29545  1.6  0.0     0    0 ?        RW   14:03   0:12 [httpd]
nobody   29850  1.9  0.0     0    0 ?        RW   14:05   0:12 [httpd]
nobody   29887  2.0  0.0     0    0 ?        RW   14:05   0:12 [httpd]
root     29904  0.0  0.2  4596 2288 ?        S    14:06   0:00
/usr/sbin/exim -bd -q1h
nobody   29957  2.0  0.0     0    0 ?        RW   14:06   0:12 [httpd]
nobody   30010  2.2  0.0     0    0 ?        RW   14:07   0:12 [httpd]
nobody   30011  2.4  0.0     0    0 ?        RW   14:07   0:13 [httpd]
nobody   30186  3.0  0.0     0    0 ?        RW   14:09   0:13 [httpd]
nobody   30225  3.2  0.0     0    0 ?        RW   14:09   0:13 [httpd]
nobody   30227  3.2  0.0     0    0 ?        RW   14:09   0:13 [httpd]
nobody   30230  3.2  0.0     0    0 ?        RW   14:09   0:13 [httpd]


Thank you,
Tina..