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Here are my results after downgrading the kernels. This is yesterday running with pve-kernel-2.6.24-7-pve_2.6.24-11_amd64.deb for the first 3 hours until 3:27am where you see the "linux restart line. Then running with pve-kernel-2.6.24-7-pve_2.6.24-8_amd64.deb myhost:~# sar -P Linux myhost...

Good point Dietmar, However I would like to clarify a couple of points. We have that issue on a production server that only runs OpenVZ and no KVM. We have not noticed any IO issue at all as we run Adaptec Raid with 512MB which at no load gives us between 500 - 600 MB/s bandwidth. Our issue...

I am not so sure that I am seeing much improvements. I seem to still see some spikes... However my sap -P command also seems to have stopped at the last reboot.... I tried to uninstall and re-install and even reboot the server but it still shows only the stats up to when I last changed the...

Great. I just updated this kernel as well and I am monitoring data.

I guess you are referring to pve-kernel-2.6.24-5-pve_2.6.24-6_amd64.deb? Earlier you said that it improved the situation a bit. Over the course of 10 hours when you run the command sar -P (assuming you installed systats), do you still see load spikes?

Which version of proxmox was originally released with the kernel 2.6.24-5-pve ? Was it 1.1 or 1.2 or else? I confirm that it still happens with pve-kernel-2.6.24-7-pve_2.6.24-8_amd64.deb

I installed pve-kernel-2.6.24-7-pve_2.6.24-11_amd64.deb and left it run for about 3 hours and still noticed load spikes.... I just installed pve-kernel-2.6.24-7-pve_2.6.24-8_amd64.deb and will let it run for a while and report back.

@Dietmar, I will install the previous kernel pve-kernel-2.6.24-7-pve_2.6.24-11_amd64.deb and reboot the production server in about 5 hours from now and will observer the data and let you know.

I guess the answer that appears to be very difficult for you to give is the following: 1. Download the kernel using the command: wget <kernel ftp url provided above> 2. Run the command dpkg -i <kernel file> to install it. 3. Edit the file /boot/grub/menu.lst and change the order of...

Dietmar, The third kernel link is broken. Could you please update it?

Sharon, 1. What instructions did you use to load the previous Kernel? 2. Did you load each of the previous kernel versions to test? 3. Are you still experiencing occasional high loads?

Dietmar, How do I install a previous kernel? Do I just install the deb file and reboot? It would be helpful if you can provide the exact commands to run so we are all on the same page. Thanks.

1. Could you please provide the instructions/command that you followed to reboot into 1.3? 2. In 1.3 you did not have that issue at all? 3. Are there any risk to reboot into the 1.3 kernel from 1.4? I use the adaptec raid 5405z with 512ram. Is there a change I can run into driver issues...

This looks pretty similar to the problem we are facing as well, reported on this thread: http://www.proxmox.com/forum/showthread.php?p=13409 In my case with only about 10 vz running, the load sometimes hits 20-30 one or more times every hour. I hope the proxmox team can find a solution soon.

Here is my lsmod from the server where things used to work fine. That server was a Xeon 5470 at 3GHz. Note that this previous server was updated to 1.4 after everything was migrated away from it and is currently running no vps. (the new and current one is nehalem 5520). previoushost:~#...

Thank you for your reply Dietmar, Here is the output that you requested. myhost:~# lsmod Module Size Used by kvm_intel 61416 0 kvm 203792 1 kvm_intel vzethdev 23552 0 vznetdev 32904 30 simfs...

Alright guys I have received enough complains to take this as a serious issue. While I appreciate the work of the proxmox team, I think I am about to give up on proxmox... This performance issue is a nightmare and no one knows the cause. I might just go straight with a centos openvz...

Thanks for your reply Dietmar. Unfortunately this is not the case. Something is not normal. Here is the equivalent memory/swap for that timeframe: The server has 24GB of RAM. It always had at least 5GB free. It never hit the swap. myhost:~# sar -r -n 27 Linux myhost 2.6.24-8-pve...

Re: Server sometimes slow - update I thought I could post an update here. The problem of slowness of OpenVZ vps is still current. It seems a little better with 1.4 than 1.4b but here is some latest data from the command sar -P Is there any reason why this host with only 12 active vps would...

Alright guys I finally found the issue. This had nothing to do with Proxmox.... a vps user changed their mail server while we were migrating the vps to the new hardware and that is why the emails were not going out... Nothing wrong with proxmox with respect to this issue... Thanks for...