OES2 High load

[FBezemer]

Hi,

I have very high load on my OES2 Linux servers (part of a cluster).
Hardware is HP DL360G5 10GB memory physical install.

oes2a:/etc/init.d # procinfo
Linux 2.6.16.54-0.2.8-smp (geeko@buildhost) (gcc 4.1.2 20070115) #1 SMP Mon Jun 23 13:41:12 UTC 2008 4CPU [oes2a.]

Memory: Total Used Free Shared Buffers
Mem: 10234616 2739164 7495452 0 51984
Swap: 4200988 0 4200988

Bootup: Fri Jul 25 12:03:13 2008 Load average: 5.66 5.67 5.15 1/1180 26117

user : 0:04:20.19 2.2% page in : 622795
nice : 0:01:11.78 0.6% page out: 397006 disk 2: 1097r 807w
system: 0:02:32.27 1.3% page act: 79405 disk 3: 79r 0w
IOwait: 0:00:39.31 0.3% page dea: 0 disk 4: 197r 3w
hw irq: 0:00:00.55 0.0% page flt: 39820203 disk 5: 653r 30w
sw irq: 0:00:05.58 0.0% swap in : 0 disk 6: 290r 1401w
idle : 3:07:32.62 95.6% swap out: 0 disk 7: 334r 154w
uptime: 0:49:06.90 context : 8761646

irq 0: 736523 timer irq130: 0 uhci_hcd:usb5
irq 1: 139 i8042 irq138: 2608 uhci_hcd:usb6, hpqci
irq 3: 1 irq146: 37459 ipmi_si
irq 4: 1 irq154: 25148 0 0
irq 8: 1 rtc irq162: 38317 0 0
irq 9: 0 acpi irq169: 0 ehci_hcd:usb1, uhci_
irq 12: 96 i8042 irq170: 48192 0 0
irq 14: 26523 ide0 irq177: 0 uhci_hcd:usb3
irq114: 140395 0 0 irq185: 0 uhci_hcd:usb4

Server is completely idle, but load is still very high, what could be causing this?

Thanks,
Frank