apache20 going nuts

[John]

Hi all,

Recently, occasionally apache starts using lots of processor on one of
my servers.  This has started out of the blue.  I am running apache
2.0.58 and 
FreeBSD codeine.yoafrica.com 6.1-STABLE FreeBSD 6.1-STABLE #0: Sat Jun
17 01:52:21 CAT 2006
sysjo at codeine.yoafrica.com:/usr/obj/usr/src/sys/CODEINE  i386

I have just upgraded to apache 2.0.59.  This happens randomly and I
can't trace it to anything else.

On the webserver, I am running roundcube, vexim, mailman and a couple of
very small php apps I've built myself.  When I say small I mean very
very small.

Does anyone have any ideas about what I could do about this.  Find out
what in apache is using the processor so much.

TIA,

-John


last pid: 70289;  load averages:  8.38,  7.15,  3.95 up 52+17:42:14  23:12:10
168 processes: 9 running, 159 sleeping
CPU states: 98.1% user,  0.0% nice,  1.9% system,  0.0% interrupt,  0.0% idle
Mem: 316M Active, 366M Inact, 217M Wired, 50M Cache, 110M Buf, 39M Free
Swap: 2004M Total, 142M Used, 1862M Free, 7% Inuse

  PID USERNAME  THR PRI NICE   SIZE    RES STATE    TIME   WCPU COMMAND
51874 www         1 130    0 19148K 12976K RUN      1:01 12.30% httpd
67045 www         1 129    0 16308K 10028K RUN      0:55 11.96% httpd
29639 www         1 130    0 19188K 13032K RUN      1:22 11.91% httpd
62291 www         1 130    0 19160K 13020K RUN      1:05 11.77% httpd
87078 www         1 130    0 19108K 12888K RUN      0:57 11.77% httpd
67445 www         1 129    0 22812K 16668K RUN      1:06 11.72% httpd
67056 www         1 129    0 18848K 12600K RUN      0:55 11.72% httpd