[CentOS] how can I stress a server?

Hi all,

I have a server, with an Intel DG35EC motherboard, Q9300 CPU, 8GB
Kingston DDRII RAM which can't take a lot of load. I have 4 XEN VPS's
on there, which doesn't consume more than 4GBM RAM at this stage. Yet,
the machine sky rockets at some times. I've moved the XEN VPS's to
another server, with 4GM RAM, and it doesn't cause the same problems.

So, apart from memtest86 how else can I stress test the server to find
out what the problem is?


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Kind Regards
Rudi Ahlers