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I am just wondering if people can help me troubleshoot something. I currently have a dedicated server with Xen SolusVM set up on it. The VPS seems to be limited on its download speed.

I ran a test file (http://ipv4.download.thinkbroadband.com/512MB.zip) on the dedicated server and it was downloading at about 20MB/s. I then did the same test on the VPS (logged in as root both times using wget) and it only downloaded at about 500KBps.

Can anyone offer any hints or tips as to where to look if it is limited somehow? In SolusVM it is set as unlimited network speed.

Tenatious
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  • N/W throughput may vary due to various reason. However best throughput you will get on VM, if machines with better physical CPUs are expected to achieve higher network throughputs. VCPU may be the bottleneck for this network throughput. – Pratap Aug 22 '13 at 09:57
  • It's the only VPS on the dedicated server at the moment and has all the CPU cores available (E3 1240V2) so I can't understand why it's reducing from 20/30Mb/s to 500KBps. – Tenatious Aug 22 '13 at 11:23
  • can you check your nic configuration? Check the NIC speed too. – Pratap Aug 22 '13 at 11:58
  • Just have this in the eth0 config on the VPS: DEVICE=eth0 BOOTPROTO=static ONBOOT=yes IPADDR=72.46.159.53 NETMASK=255.255.255.248 – Tenatious Aug 22 '13 at 12:01
  • how about running this "dmesg | grep -i duplex". Run the same commmand on both physical and vm too – Pratap Aug 22 '13 at 12:02
  • Nothing on the VM. Main is this: e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx e1000e: peth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx – Tenatious Aug 22 '13 at 12:07
  • let us [continue this discussion in chat](http://chat.stackexchange.com/rooms/10260/discussion-between-pratapsingh-and-tenatious) – Pratap Aug 22 '13 at 12:08

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Turns out I had installed something that was throttling the network connection! A fresh install of CentOs and then CloudLinux fixed the issue :)

Tenatious
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