What's the IO sub-system on the VMWare backend?

On Mon, Oct 15, 2012 at 11:01 AM, Jonathan Bayer <
[email protected]> wrote:

> Hi,
>
> I'm having a problem with a new VM which we just put into production.
>
> We have 4 physical web servers, all running the same webapp.  They are all
> running RHEL 5.6
>
> T
> This new VM is configured the same way, the only real difference is that
> it is CentOS instead of RHEL.
>
> The apache configs are identical except for IP addresses.
>
> The kernel parameters are also as identical as I can tell, by using
> sysconfig -a and comparing the outputs between the two.
>
> All physical servers have 8 cpus, and 48 gig of memory
>
> The VM has 8 CPUs, and 30 gig of memory
>
> The application goes to a load balancer, which then balances among the
> systems using a least-connection protocol.
>
> All servers have a 1 minute load of around 5, and an average of around
> 200-300  reqs/second
>
> The problem is that when the req/sec starts to climb on the VM, all of a
> sudden the load average skyrockets to 40-50 or even higher. This kills the
> server and makes it totally unresponsive.
>
> Anybody have any suggestions?
>
> Thanks in advance
>
>
> JBB
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-- 
Jesse Becker
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