[PVE-User] about IO Delay using openvz and zimbra

[Gerald Brandt]

Hi,

Your fsyncs per second are brutal, and Proxmox needs high fsyncs. I 
would start there.

Gerald


On 2016-06-16 09:38 PM, Orlando Martinez Bao wrote:
> Hello friends
>
> I am SysAdmin at the Agrarian University of Havana, Cuba.
>
>   
>
> I have installed Proxmox v3.4 here a cluster of seven nodes and for some
> days I am having problems with a node in the cluster which only has a
> Container with Zimbra 8.
>
> The problem is I'm having a lot of I / O Delay and that server is very slow
> to the point that sometimes the service is down.
>
> The server is PowerEdge T320 Dell with Intel Xeon E5-2420 12gram with 12
> cores and 1GB of disk 7200RPM 2xHDD are configured as RAID1.
>
> I have virtualizing the zimbra 8 using a template of 12.04, has 8 cores, 8G
> RAM, 500GHD the storage of container is local storage.
>
> Then I put the output to see the IO when you are not running the VM. Look at
> the BUFFERED READS that are marked are very bad. And those moments have seen
> IO Delay up to 50%.
>
>   
>
> root at n07:~# pveperf
>
> CPU BOGOMIPS:      45601.20
>
> REGEX/SECOND:      1025079
>
> HD SIZE:           9.84 GB (/dev/mapper/pve-root)
>
> BUFFERED READS:    1.51 MB/sec
>
> AVERAGE SEEK TIME: 165.88 ms
>
> FSYNCS/SECOND:     0.40
>
> DNS EXT:           206.20 ms
>
> DNS INT:           0.91 ms (unah.edu.cu)
>
> root at n07:~# pveperf
>
> CPU BOGOMIPS:      45601.20
>
> REGEX/SECOND:      1048361
>
> HD SIZE:           9.84 GB (/dev/mapper/pve-root)
>
> BUFFERED READS:    0.78 MB/sec
>
> AVERAGE SEEK TIME: 283.84 ms
>
> FSYNCS/SECOND:     0.50
>
> DNS EXT:           206.13 ms
>
> DNS INT:           0.89 ms (unah.edu.cu)
>
> root at n07:~# pveperf (Este fue cuando detuve la VM)
>
> CPU BOGOMIPS:      45601.20
>
> REGEX/SECOND:      1073712
>
> HD SIZE:           9.84 GB (/dev/mapper/pve-root)
>
> BUFFERED READS:    113.04 MB/sec
>
> AVERAGE SEEK TIME: 13.49 ms
>
> FSYNCS/SECOND:     9.66
>
> DNS EXT:           198.59 ms
>
> DNS INT:           0.86 ms (unah.edu.cu)
>
> root at n07:~# pveperf
>
> CPU BOGOMIPS:      45601.20
>
> REGEX/SECOND:      1024213
>
> HD SIZE:           9.84 GB (/dev/mapper/pve-root)
>
> BUFFERED READS:    164.30 MB/sec
>
> AVERAGE SEEK TIME: 13.61 ms
>
> FSYNCS/SECOND:     16.34
>
> DNS EXT:           234.75 ms
>
> DNS INT:           0.94 ms (unah.edu.cu)
>
>   
>
>   
>
> Please help me.
>
> Best Regards
>
> Orlando
>
>   
>
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