Strange "Stalling"

I'm seeing a really weird problem with one of our older VPS hosts which I'm having trouble tracking down.

Setup

Dual Xeon 4GB Ram
Virtually 0 swap used
Load idels about 0.8 and then peaks hugely to 26

Whilst peaking the machine is totally non-responsive (i.e. no ping even). It seems to lock up hard. The main disks are a RAID-1 software mirror (all new ones are hardware raid). From dmesg etc I'm not getting any disk errors but I just can't help but think its all getting hung up on I/O

Anyone seen something like this before?

Rus

 

 

 

 

Top