Very Slow File Transfer Speed Between Windows 2008 Guest VMs Running On The Same Oracle VM Server

(Doc ID 2391767.1)

Last updated on MAY 08, 2018

Applies to:

Oracle VM - Version 3.4.1 and later
Information in this document applies to any platform.

Symptoms

Very slow file transfer speed between Windows 2008 guest VMs running on same Oracle VM Server.

The iperf test result is as follows.

WinA as client and WinB as Server
=================================
C:\Users\Administrator\Desktop>iperf3.exe -c <IP of winB>
Connecting to host xx.xx.xx.xx, port 5201
[ 4] local xx.xx.xx.xx port 49163 connected to xx.xx.xx.xx port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.01 sec 53.6 MBytes 444 Mbits/sec
[ 4] 1.01-2.01 sec 0.00 Bytes 0.00 bits/sec
[ 4] 2.01-3.01 sec 0.00 Bytes 0.00 bits/sec
[ 4] 3.01-4.01 sec 0.00 Bytes 0.00 bits/sec
[ 4] 4.01-5.01 sec 0.00 Bytes 0.00 bits/sec
[ 4] 5.01-6.01 sec 0.00 Bytes 0.00 bits/sec
[ 4] 6.01-7.00 sec 0.00 Bytes 0.00 bits/sec
[ 4] 7.00-8.00 sec 0.00 Bytes 0.00 bits/sec
[ 4] 8.00-9.00 sec 0.00 Bytes 0.00 bits/sec
[ 4] 9.00-10.02 sec 0.00 Bytes 0.00 bits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-10.02 sec 53.6 MBytes 44.9 Mbits/sec sender
[ 4] 0.00-10.02 sec 53.4 MBytes 44.7 Mbits/sec receiver

iperf Done.

Changes

 Changing default values of properties in Oracle VM Virtual Ethernet Adapter.

Cause

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