strange high load while restoring backups

[LAZer]

hi i have a dell power edge r510 , with 4 * 500 gb sataII hdd with hardware raid 10 , xpu xeon 2 * 4 core , i have installed vmware 5 in it . in one vps with 10 GB of ram and 8 core of cpu, i have installed linux centos 5.8 with cpanel.
i am restoring hosts backup but load goes strangely high up to 100 . and every thing goes down till the restore completes . even when restoring small accounts of 100 - 500 gb .
this is similiar to this
http://forums.cpanel.net/f5/high-cpu-loads-whm-cpanel-backups-158473.html

Cpu(s): 40.0%us, 0.1%sy, 0.0%ni, 29.7%id, 0.6%wa, 0.3%hi, 0.2%si, 0.0%st

or something like this , cpu , idle and wa are the values which i remember from the moment of high load.
in vmware graphs i see peak in hard a little , but cpu usages decreases very much .
what ca i do for this ?
the load is usually under 2 , but it goes up to 90 100 ... it is very strange as the hdds are new . there is not too much process or traffic or other vps es in the server yet . so please guide me on this.

 

[cPanelTristan]

Hello,

At this point, I'd suggest submitting a ticket about the issue. If our backups are specifically causing a high load, then we'd need to run the backups and see what is happening on the machine itself. There's no easy way to troubleshoot this via the forums and our backups would be something we support.

Tickets can be opened in WHM > Support Center > Contact cPanel or using the link in my signature.

Thanks!

 

[LAZer]

i submitted a ticket : 2860722

well , i think i must have done something wrong while installing linux , as i always install cpanel in citrix xenserver , and with linux LVM partitions .
in vmware while i was installing linux vps , the hdd had 4 options ,
1-bus login parallel , marked as not compatible with this os
2-LSI LOGIC parallel ( DEFAULT )
3-LSI logic SAS ( i have selected this , maybe i was wrong ? )
4-vmware para virtual ( i have seen it needs driver and its almost good for win servers )

i have tried changing it to lsi logic parallel but the linux didnt boot anymore and it got me to return to lsi sas again.

anyway for example today i had 4 times of load increase up to 150 ... and becuming no-response.
and it goes down after some time like 4 or 10 when cphulkd i think kills some processes.

as i saw in htop , when the load increases the php processes do not end . and using too much cpu/memory but it donot go to the swap memory yet so i think the memory limits are correct .