One slow win2008 x86 but not others.

[ozgurerdogan]

Hello,
I have two proxmox server and my version is;

pve-manager: 1.7-10 (pve-manager/1.7/5323)
running kernel: 2.6.35-1-pve
proxmox-ve-2.6.35: 1.7-9
pve-kernel-2.6.32-4-pve: 2.6.32-30
pve-kernel-2.6.35-1-pve: 2.6.35-9
qemu-server: 1.1-28
pve-firmware: 1.0-10
libpve-storage-perl: 1.0-16
vncterm: 0.9-2
vzctl: 3.0.24-1pve4
vzdump: 1.2-10
vzprocps: 2.0.11-1dso2
vzquota: 3.0.11-1
pve-qemu-kvm: 0.13.0-3
ksm-control-daemon: 1.0-4

There are two 2008 and one linux and all are 32 bit and running fine. But one win2008 is running very slow. There is no different between windows boxes and just can not understand why it is so slow. It is not about hardware. I tried Virtio and IDE harddrives but still same. And there is no software in vm which could make it slow.

Here is config of it:

name: WebServer2
bootdisk: virtio0
ostype: w2k8
memory: 2048
onboot: 1
sockets: 1
cores: 1
boot: c
freeze: 0
cpuunits: 1000
acpi: 1
kvm: 1
ide0: ISO:iso/virtio-win-1.1.11-0.iso,media=cdrom
vlan0: e1000=XX:XX:XX:91:8E:29
virtio0: local:105/vm-105-disk-1.raw

Is there a way that I can track or check what makes it so slower than other vm?

Thanks

 

[ozgurerdogan]

After uninstalling Mcafee Enterprise Antivirus, it is now much better but not as accepted. I think something in windows makes is slow. I will investigate deeper. But interesting is, other win2008 vms are very simillar and has Mcafee Enterprise installed and running perfect.

 

[tom]

in this case I would just reinstall this VM - slow win boxes with av installed are sometimes really hard to debug (for me).

 

[tom]

what do you get with 'pveperf'? pls run when the host is idle.

 

[ozgurerdogan]

I got these (would be happy if you could explain them shortly)

CPU BOGOMIPS: 3723.79
REGEX/SECOND: 384742
HD SIZE: 94.49 GB (/dev/mapper/pve-root)
BUFFERED READS: 100.55 MB/sec
AVERAGE SEEK TIME: 11.20 ms
FSYNCS/SECOND: 859.99
DNS EXT: 145.23 ms
DNS INT: 205.80 ms (mydomain.com)

What do you mean by reinstalling? Install OS from scratch? Or is there something for KVM like reinstall or repair?

Thank you for your help.

 

[tom]

I got these (would be happy if you could explain them shortly)

CPU BOGOMIPS: 3723.79
REGEX/SECOND: 384742
HD SIZE: 94.49 GB (/dev/mapper/pve-root)
BUFFERED READS: 100.55 MB/sec
AVERAGE SEEK TIME: 11.20 ms

looks like a single sata HDD.

FSYNCS/SECOND: 859.99

single SATA driver with harddrive cache enabled.
just to mention, this means if you get a powerfailure you will loose the data stored in the harddisk cache - therefore you should use a raid controller with BBU unit and you should disable the hard drive cache as this one is not power failure resistant.

DNS EXT: 145.23 ms
DNS INT: 205.80 ms (mydomain.com)

What do you mean by reinstalling? Install OS from scratch? Or is there something for KVM like reinstall or repair?
Thank you for your help.

As others works it looks like there is an issue inside windows and most times a reinstallation from scratch is the fastest solution in the windows world. Running Virus scanners can cause a lot of troubles and each time when I got direct contact with MS experts they always recommend to remove the virus scanner as the first debug measure. but this is not a windows forum and this is just my personal experience.

 

[ozgurerdogan]

Is this a serious thing in case of powerfailure when harddisk cache is enabled?

Yes this is probably a AV issue. But on same node, same vms with same softwares but one of them is slow. Strange... But possible in MS world

Do you have any recommenditaion about a antivirus software for proxmox vm based on KVM kernel?

Thank you.

 

[tom]

Is this a serious thing in case of powerfailure when harddisk cache is enabled?

yes, but this is not Proxmox related - this is a general topic.

Yes this is probably a AV issue. But on same node, same vms with same softwares but one of them is slow. Strange... But possible in MS world

Do you have any recommenditaion about a antivirus software for proxmox vm based on KVM kernel?

Thank you.

no sorry - if possible use Linux instead of MS but I assume this does not help here

 

[ozgurerdogan]

So what is the best practise for sata disk users like me about harddisk cache enabled? I do not want to use raid controller with BBU for some servers. And I regularly take nightly backups.

 

[tom]

there is no recommendation using desktop storage equipment - go for server hardware with hardware raid.