High Server Load and top

15:43:17 up 30 min, 2 users, load average: 41.15, 33.35, 22.17
90 processes: 88 sleeping, 2 running, 0 zombie, 0 stopped
CPU states: cpu user nice system irq softirq iowait idle
total 6.1% 0.0% 0.9% 15.1% 23.8% 1.1% 52.6%
Mem: 505396k av, 293632k used, 211764k free, 0k shrd, 55820k buff
230328k active, 16844k inactive
Swap: 1052248k av, 0k used, 1052248k free 121824k cached

PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND
6759 mailnull 15 0 3748 3748 2576 S 3.7 0.7 0:00 0 exim
2878 named 15 0 5260 5260 2152 S 0.1 1.0 0:02 0 named
6421 root 16 0 1116 1116 884 R 0.1 0.2 0:01 0 top
6467 nobody 15 0 11592 11M 2336 S 0.1 2.2 0:00 0 httpd
1 root 15 0 488 488 432 S 0.0 0.0 0:03 0 init
2 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 keventd
3 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kapmd
4 root 34 19 0 0 0 SWN 0.0 0.0 0:00 0 ksoftirqd/0
7 root 25 0 0 0 0 SW 0.0 0.0 0:00 0 bdflush
5 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kswapd
6 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kscand
8 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kupdated
9 root 25 0 0 0 0 SW 0.0 0.0 0:00 0 mdrecoveryd
13 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kjournald
68 root 25 0 0 0 0 SW 0.0 0.0 0:00 0 khubd
1265 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kjournald
1582 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 eth0
1822 root 15 0 568 568 488 S 0.0 0.1 0:00 0 syslogd
1826 root 15 0 452 452 392 S 0.0 0.0 0:00 0 klogd
1864 root 15 0 404 404 344 S 0.0 0.0 0:00 0 mdadm
1877 root 15 0 12152 11M 1376 S 0.0 2.4 0:00 0 mdmpd
1878 root 25 0 12152 11M 1376 S 0.0 2.4 0:00 0 mdmpd
1981 root 15 0 1876 1876 1384 S 0.0 0.3 0:00 0 cupsd
2003 root 15 0 1520 1520 1276 S 0.0 0.3 0:00 0 sshd
2017 root 15 0 908 908 780 S 0.0 0.1 0:00 0 xinetd