[CentOS-virt] VM Slowness

     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 at hotrodpc.com>
> To: centos-virt at centos.org
> Subject: [CentOS-virt] 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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