Can you give us more information about your sentences "traffic is very low"
and "server hangs again"?, send us logs, tell us how is the system status,
how It is failing, send us your zen rrd-jpg images
I wrote you about disabling some parameters on any files. Did you try this
and restarted the machine?
The operative system is very stable at this moment but it would be very
interesting to study why it's not stable in you xen server.
Regards!
2012/2/17 Jaume Ponsa <[email protected]>
> Hi, the server hangs again every 2 / 3 days. Cause it is testing
> environment, traffic is very low. It is not Vmware environment (as I say
> before), it is xenserver environment. I install xentools, upgrade to
> v2RC2 , and change 8 cpus to 1 cpu.
>
> What can I do now?
>
> Jaume Ponsa
>
> Sistemes i Xarxes Inf. Calidae, S.L.
> [www.calidae.net] - [email protected]
> tel +34 938654433 fax +34 938651973
>
>
> El 08/02/12 14:20, David Martin (IT) escribió:
> > What type of traffic? I really can't see that 8 vCPUS are needed unless
> it is VERY heavy stuff. Even "Enterprise" load-balancers like the F5
> BIG-IPs don't have that kind of CPU firepower until you get to the very
> high end kit. My own environment has not grown to that size as of yet as we
> are still using the BIG-IPs but we are not predicting anything like 8vCPUs
> based on current tests.
> >
> > Start with one vCPU, test performance, and increase your CPU resources
> accordingly (if required). With VMWare, it is always best to start at the
> low end and increase the resources if needed when working with new
> applications. The vast majority of our Windows servers, for example, are
> running with 1vCPU and 1GB RAM with no difficulty. The big stuff, databases
> and high end app servers, are loaded with both memory and CPU, but only
> after very careful benchmarking.
> >
> > Careful tuning of the VM and the workloads mean you can get away with
> very low footprints if you can afford to put the time in. In turn, vMotion,
> DRS, HA and all the other clever VMWare magic work more quickly with the
> smaller footprint VMs.
> >
> > I also agree with Nick, you should get the VMWare tools installed asap
> as these provide proper network drivers which will be critical to your
> success.
> >
> > Regards
> >
> > David
> >
> >
> > -----Original Message-----
> > From: Jaume Ponsa [mailto:[email protected]]
> > Sent: 08 February 2012 12:54
> > To: [email protected]
> > Subject: Re: [Zenloadbalancer-support] question
> >
> > I was planning to manage 3 real servers behind ZLB and 600 concurrent
> petitions...
> >
> > not necessary 8 cpu's?
> >
> > When cpu is 100% can't access machine, so can't type "top"
> >
> > Jaume Ponsa
> >
> > Sistemes i Xarxes Inf. Calidae, S.L.
> > [www.calidae.net] - [email protected]
> > tel +34 938654433 fax +34 938651973
> >
> >
> > El 08/02/12 13:27, David Martin (IT) escribió:
> >> Is there a performance reason why you have 8 vCPUs assigned to the VM?
> >> Unless you are planning an absolutely massive load-balance pool that
> >> can actually use this arrangement you should drop this considerably
> >> according to VMWare best practice.
> >>
> >> My understanding is that, every time you introduce another vCPU, the
> >> overhead for context-switches, register flushes, synchronisation and
> >> the like increases considerably, especially when you are spreading the
> >> vCPUs across different dies.
> >>
> >> Unless you have applications that absolutely have to have access to
> >> the CPU power, you really want to cut the cores to the bare minimum.
> >> Try starting with 1vCPU and 4GB RAM and work your way up until you
> >> start to hit performance limits.
> >>
> >> Also, when you are seeing 100% CPU usage, what does the output of the
> >> "Top" command show?
> >>
> >> Regards
> >>
> >> David
> >>
> >>
> >> -----Original Message-----
> >> From: Jaume Ponsa [mailto:[email protected]]
> >> Sent: 08 February 2012 10:28
> >> To: '[email protected]'
> >> Subject: [Zenloadbalancer-support] question
> >>
> >> Hello all... I have one testing v2RC1 installation on a vmware virtual
> >> machine.
> >>
> >> I have no more traffic (only tests) and I don't know why, 2 times,
> >> system hangs ..... the reason is cpu becomes 100% usage and system
> >> becomes unusable.... can anyone help me pleas?
> >>
> >> I don't think will be a hardware problem, because i have other
> >> machines running perfectly, and for this Zen machine I reserved 4Gb
> >> RAM and 8 CPU Xeon E5620
> >>
> >> I installed ther kernel 2.6.32-5-686-bigmem to allow more than 4Gb RAM
> >> (in future I'll assign 16Gb ). May be have to install
> >> linux-image-2.6.32-5-vserver-686-bigmem kernel???
> >>
> >> Thanks
> >>
> >> --
> >> Jaume
> >>
> >>
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> Virtualization & Cloud Management Using Capacity Planning
> Cloud computing makes use of virtualization - but cloud computing
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