[PVE-User] Very slow server (RAW IDE discs and KVM)
Muhammad Yousuf Khan
sirtcp at gmail.com
Thu Aug 11 18:07:32 CEST 2011
i agree with Frédéric Massot this can be storage issue as well, if you are
using software RAID there are chances that you going to increase your IO.
find a process by command "ps -afx | grep vzdump" kill the process. by
"kill XXXX" (where XXX is process ID in numbers)
if i were you i would have restarted the system Proxmox Machine :).... to
reset all the backup jobs if running.
use windows share or NFS share as backup storage. don't store backup files
on local hard disk (in my opinion).
On Thu, Aug 11, 2011 at 5:08 PM, Erik van Ast <Erik.van.Ast at suzohapp.nl>wrote:
> Hi all,
>
> I removed the machines that were creating problems and I also deleted the
> backup job. The system is still very slow when creating a new VM, but I
> still can't figure out why.
>
> This is the status of the server Atop shows when running only the 2008
> machine (106:but being only "idle") :
>
> proxmox:~# atop
> ATOP - proxmox 2011/08/11 13:13:51 10 seconds
> elapsed
> PRC | sys 0.19s | user 0.29s | #proc 132 | #zombie 0 | #exit
> 0 |
> CPU | sys 1% | user 1% | irq 0% | idle 395% | wait
> 4% |
> cpu | sys 0% | user 0% | irq 0% | idle 96% | cpu002 w
> 4% |
> cpu | sys 0% | user 0% | irq 0% | idle 99% | cpu000 w
> 0% |
> cpu | sys 0% | user 0% | irq 0% | idle 99% | cpu001 w
> 0% |
> CPL | avg1 0.45 | avg5 0.44 | avg15 0.37 | csw 45320 | intr
> 33065 |
> MEM | tot 7.8G | free 4.4G | cache 45.5M | buff 24.5M | slab
> 73.7M |
> SWP | tot 7.0G | free 7.0G | | vmcom 3.3G | vmlim
> 10.9G |
> DSK | sda | busy 6% | read 3 | write 33 | avio 16
> ms |
> NET | transport | tcpi 1 | tcpo 2 | udpi 0 | udpo
> 0 |
> NET | network | ipi 32 | ipo 4 | ipfrw 0 | deliv
> 14 |
> NET | tap106 0% | pcki 18 | pcko 54 | si 2 Kbps | so 6
> Kbps |
> NET | eth0 0% | pcki 54 | pcko 22 | si 6 Kbps | so 4
> Kbps |
> NET | vmbr0 ---- | pcki 55 | pcko 4 | si 4 Kbps | so 1
> Kbps |
>
> PID SYSCPU USRCPU VGROW RGROW RDDSK WRDSK ST EXC S CPU CMD 1/1
> 2533 0.16s 0.29s 0K 0K 24K 182K -- - S 5% kvm
> 2659 0.02s 0.00s 0K 0K 0K 0K -- - R 0% atop
> 2079 0.01s 0.00s 0K 0K 0K 0K -- - S 0% rsyslogd
> 1963 0.00s 0.00s 0K 0K 0K 0K -- - S 0% iscsid
>
> When creating a new 2003 machine (102) which is "installing devices" at the
> moment of this screencapture. Installing devices is normally not very
> intensive to do, but the disc has been between 90-99% all the time when
> installing this new machine :
> proxmox:~# atop
> ATOP - proxmox 2011/08/11 13:52:01 10 seconds
> elapsed
> PRC | sys 0.35s | user 0.83s | #proc 133 | #zombie 0 | #exit
> 0 |
> CPU | sys 2% | user 4% | irq 0% | idle 274% | wait
> 121% |
> cpu | sys 1% | user 2% | irq 0% | idle 52% | cpu000 w
> 45% |
> cpu | sys 0% | user 1% | irq 0% | idle 34% | cpu001 w
> 65% |
> cpu | sys 0% | user 1% | irq 0% | idle 98% | cpu003 w
> 1% |
> cpu | sys 0% | user 0% | irq 0% | idle 90% | cpu002 w
> 9% |
> CPL | avg1 1.42 | avg5 1.51 | avg15 1.38 | csw 92874 | intr
> 68089 |
> MEM | tot 7.8G | free 1.9G | cache 478.7M | buff 34.3M | slab
> 112.5M |
> SWP | tot 7.0G | free 7.0G | | vmcom 5.3G | vmlim
> 10.9G |
> DSK | sda | busy 99% | read 11 | write 260 | avio 36
> ms |
> NET | transport | tcpi 137 | tcpo 200 | udpi 0 | udpo
> 0 |
> NET | network | ipi 149 | ipo 200 | ipfrw 0 | deliv
> 144 |
> NET | tap106 0% | pcki 218 | pcko 234 | si 32 Kbps | so 42
> Kbps |
> NET | tap102 0% | pcki 0 | pcko 31 | si 0 Kbps | so 2
> Kbps |
> NET | eth0 0% | pcki 328 | pcko 416 | si 49 Kbps | so 135
> Kbps |
> NET | vmbr0 ---- | pcki 124 | pcko 156 | si 7 Kbps | so 99
> Kbps |
> NET | lo ---- | pcki 44 | pcko 44 | si 12 Kbps | so 12
> Kbps |
> PID SYSCPU USRCPU VGROW RGROW RDDSK WRDSK ST EXC S CPU CMD
> 1/1
> 2533 0.15s 0.39s 0K 0K 0K 117K -- - S 5% kvm
> 2743 0.17s 0.36s 0K 0K 56K 820K -- - S 5% kvm
> 2607 0.00s 0.04s 0K 0K 0K 8K -- - S 0% pvedaemon
> 2807 0.00s 0.02s 0K 0K 0K 0K -- - S 0% apache2
> 2808 0.00s 0.02s 0K 0K 0K 0K -- - S 0% apache2
> 2659 0.02s 0.00s 0K 0K 0K 0K -- - R 0% atop
> 2753 0.01s 0.00s 0K 0K 0K 0K -- - S 0% qm
> 2609 0.00s 0.00s 0K 0K 0K 0K -- - S 0% pvedaemon
> 15 0.00s 0.00s 0K 0K 0K 0K -- - R 0% events/0
> 1752 0.00s 0.00s 0K 0K 0K 12K -- - S 0% kjournald
> 2545 0.00s 0.00s 0K 0K 0K 0K -- - S 0%
> flush-254:2
>
> How can I check if there is still a backup or another process running in
> the background that is causing these performance problems. Only 2 VM's are
> currently running and one of them is installing and the other is idle, so
> the server has not much to do... The proxmox server has also been restarted
> before I started creating the new 2003 machine...
>
> Kind regards,
> Erik
>
>
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> Message: 1
> Date: Thu, 11 Aug 2011 10:46:27 +0200
> From: "Erik van Ast" <Erik.van.Ast at suzohapp.nl>
> To: <pve-user at pve.proxmox.com>
> Subject: Re: [PVE-User] Very slow server (RAW IDE discs and KVM)
> Message-ID:
> <80A72F1B1CFF80409D8E422437CEDC9A02537F91 at srv03-suzo-03.Suzo.int>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Muhammad,
>
> Thank you for your reply. This might be the problem I am facing now,
> because I tested a couple of backup options and both machines are backed up
> every night.
> Does anyone have experience with this? I will search big friend Google now,
> but if someone knows what to do exactly, please let me know...
>
> Met vriendelijke groet / Kind regards / Mit freundlichem Gru?,
> _______________________________________________________________
>
> Erik
> ------------------------------
>
> ------------------------------
>
> Message: 2
> Date: Thu, 11 Aug 2011 14:45:30 +0500
> From: Muhammad Yousuf Khan <sirtcp at gmail.com>
> To: Erik van Ast <Erik.van.Ast at suzohapp.nl>
> Cc: pve-user at pve.proxmox.com
> Subject: Re: [PVE-User] Very slow server (RAW IDE discs and KVM)
> Message-ID:
> <CAGWVfM=
> T0EKKBHYrJhgP0T9ZbhsxjVMDZknGBNZYOxRBL97XfQ at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> perhaps i got the catch here actually you might be backing up 180 GB of
> data as you said your VM is 180GB in size. so backup up that amount of data
> will kill your IO and chock the bandwidth. Heavy (Big virtual HD) machines
> as VMs are not recommended since backup should be the problem. even-though
> you are running the whole system on a Desktop machine. i am also running one
> machine with the same config as yours in production. my machine contains 7
> VMs of different OS flavor Linux and windows. however all of them are lesser
> then 25 GB. i am running this whole bunch for about more then 3 months and
> never had the performance issue, by limiting the bandwidth and using less
> GBs for Virtual Hard disks.
>
> u can limit the bandwidth by following the instructions below..
>
> Create the /etc/vzdump.conf file with the following content:
>
> bwlimit: 5000
>
> Now Fileserver part. You can use separate hardware machine for the
> fileserver if you wanted to use VM just in any case then try to use NAS
> solutions. there are few very good popular and free NAS solutions out there
> like FreeNAS and Openfiler. i am using Openfiler you can always Attach NFS
> or ISCSI to your VMs as a native facility of those NAS boxes. although ISCSI
> is not recommended by me if you are using desktop machine as a NAS BOX
> because you will not reach throughput of your actual LAN. anyways it is out
> of topic. i hope this helps
>
>
>
> Thank you,
>
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