KVM Gbps speed capped, need help [Closed]

DavidL

i recently bought a KVM from sentris.net, they say the vps is gbps port enabled. But on my speed are capped to 100Mbps

[root@web ~]# wget freevps.us/downloads/bench.sh -O - -o /dev/null|bash
CPU model : QEMU Virtual CPU version (cpu64-rhel6)
Number of cores : 4
CPU frequency : 2673.298 MHz
Total amount of ram : 3830 MB
Total amount of swap : 0 MB
System uptime : 2 min,
Download speed from CacheFly: 10.6MB/s
Download speed from Coloat, Atlanta GA: 2.70MB/s
Download speed from Softlayer, Dallas, TX: 3.44MB/s
Download speed from Linode, Tokyo, JP: 4.17MB/s
Download speed from i3d.net, Rotterdam, NL: 2.56MB/s
Download speed from Leaseweb, Haarlem, NL: 7.57MB/s
Download speed from Softlayer, Singapore: 2.75MB/s
Download speed from Softlayer, Seattle, WA: 9.51MB/s
Download speed from Softlayer, San Jose, CA: 8.73MB/s
Download speed from Softlayer, Washington, DC: 5.17MB/s
I/O speed : 32.3 MB/s

i already tried to set the network card setting to use: Intel Pro/1000 and virtio, make no different.

and the hosting said this is from their node host:

# wget freevps.us/downloads/bench.sh -O - -o /dev/null|bash
...
System uptime : 101 days, 10:56,
Download speed from CacheFly: 68.9MB/s
Download speed from Coloat, Atlanta GA: 2.28MB/s
Download speed from Softlayer, Dallas, TX: 2.04MB/s
Download speed from Linode, Tokyo, JP: 1.84MB/s
Download speed from i3d.net, Rotterdam, NL: 1.67MB/s
Download speed from Leaseweb, Haarlem, NL: 6.11MB/s
Download speed from Softlayer, Singapore: 1.01MB/s
Download speed from Softlayer, Seattle, WA: 17.7MB/s
Download speed from Softlayer, San Jose, CA: 14.1MB/s
Download speed from Softlayer, Washington, DC: 1.69MB/s

ethtool info from guest kvm:

[root@web ~]# ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: umbg
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes

what could be the issue? is this server setting issue? their support is like taking forever.

century1stop

duh what do you want us to do? your provider capped network, don't believe anyone other than the provider can help. if you're not happy with it, just request a refund.

techhelper1

Ask to see if you can be migrated to a node that's not under stress.

rm_

Create a file called /etc/sysctl.d/network.conf with:

net.core.rmem_max=16777216
net.core.wmem_max=16777216
net.ipv4.tcp_rmem=4096 87380 16777216
net.ipv4.tcp_wmem=4096 65536 16777216

Then run sysctl -p /etc/sysctl.d/network.conf, and re-test. Let me know if this helped.

techhelper1

@rm_: The thing is, they shouldn't have to do that to get gigabit performance out of a VPS. If the node can't perform as well how the hell will a VM on a hypervisor do any better?

DavidL

@century1stop said:
duh what do you want us to do? your provider capped network, don't believe anyone other than the provider can help. if you're not happy with it, just request a refund.

maybe some technical check on guest end? im trying to> @rm_ said:

Create a file called /etc/sysctl.d/network.conf with:

net.core.rmem_max=16777216
> net.core.wmem_max=16777216
> net.ipv4.tcp_rmem=4096 87380 16777216
> net.ipv4.tcp_wmem=4096 65536 16777216

Then run sysctl -p /etc/sysctl.d/network.conf, and re-test. Let me know if this helped.

no luck.. the hosting might lying on their end and capped the speed...

rm_

From a second look yeah, with not even Cloudflare going over 100 Mbit, this is most likely them capping you, either out of malice or just out of incompetence (don't know how to apply new bandwidth settings/etc).

The tweaks I posted are mostly for getting closer to Gbit when you already have let's say 600-700 Mbit. But still, these are about the only thing you can do from inside the VPS to improve your network speed.

Why not consider changing the host? With the 32 MB/sec disk I/O, and with even their "Gbit" host node not getting more than 1-2 MB/sec to most destinations, this seems to be a pretty crappy host all around. Oh and even

DavidL said: their support is like taking forever.

century1stop

if it's been capped, nothing much can be done from guest end and in event network is 100Mbit but advertised as 1Gbit, I don't think any further elaboration is needed.

techhelper1

@rm_: The thing is, they shouldn't have to do that to get gigabit performance out of a VPS. If the node can't perform as well how the hell will a VM on a hypervisor do any better?

Clouvider

If you can't get the host to deliver what's promised just ask for the refund and go elsewhere. Don't waste your valuable time on teaching your host how to do their job.

DavidL

working fine now after their support work on it..