How about a top on the host? Could the virtual machine be getting swapped
out on the host?
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On Sun, 19 May 2013, compdoc wrote:
> Date: Sun, 19 May 2013 21:54:44 -0600
> From: compdoc <compdoc@xxxxxxxxxxxx>
> To: centos-virt@xxxxxxxxxx
> Subject: VM Slowness
>
> I hope this in the right list, but I was wondering if someone could help me
> with a VM I have that has lately started having problems. It had been
> running for years without problems. It's possible an update is causing this,
> but I can't say.
>
> The VM is running CentOS 5.8 and after a time, the machine begins to slow
> down. Things like pings or running commands lag. If I reboot the VM, it runs
> normally for at least a few hours, but it eventually slows again.
>
> I've tried changing the VM's virtio devices to standard devices like IDE and
> e1000, but it makes no difference. Currently its running virtio.
>
> Top shows that nothing is taking up significant cpu time, but even running
> top takes several seconds for it to open. The system is slow now, but top
> shows:
>
> top - 21:39:48 up 1 day, 5:27, 1 user, load average: 0.93, 1.37, 1.12
> Tasks: 177 total, 1 running, 176 sleeping, 0 stopped, 0 zombie
> Cpu(s): 0.3%us, 0.3%sy, 0.0%ni, 98.6%id, 0.9%wa, 0.0%hi, 0.0%si,
> 0.0%st
> Mem: 2075016k total, 1484624k used, 590392k free, 64336k buffers
> Swap: 4128760k total, 12k used, 4128748k free, 981368k cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
>
> 4124 root 20 0 2444 1080 812 R 0.1 0.1 0:00.03 top
>
> 1 root 15 0 2176 692 604 S 0.0 0.0 0:02.46 init
>
> 2 root RT -5 0 0 0 S 0.0 0.0 0:00.39 migration/0
>
> 3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
>
>
> Any ideas what to look for? Any information I can provide?
>
> Thanks
>
>
>
>
>
>
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