Hello,

is it possible to get more power/performance through the network interface, if I would change some standard settings?

For example: I could change the value of qlen from 1000 to 2000... Or does it help, if I would change the MTU?

Questions about questions...

Can somebody help me? I want to learn as much as possible.

On the MTU size really I would not think you would need to modify it from a networking standpoint.

Unless you were using iSCSI and you would want to use Jumbo Frames MTU 9000, this has to be point-to-point for it to work.

Kind of depends on the data and topology.
Some ideas may be to use a server card. They tend to default to an onboard checksum processor and they tend to be made for speed.

Limit or reduce any normal background chatter on the wire.

As above a direct wire has no switch/router loss. Change switch settings too if advanced switch. Wire speed switches help. I forget what that setting is that releases the packet before the end arrives.

Testing the card for half duplex versus full duplex may offer some speed also.

There are many old tests for mtu and some may still have value. That also may go with the transfer protocol. A ftp may still be one of the faster ways to move data.

Compress the data at end points still has value.

Some technologies can use two paths for data still.

Thank you for your help!

How can I check, which duplex mode the interface is using? I've tried it with "ethtool eth0":
It's a vServer, if it is relevant.