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In some situations, adjustments of the virtual network adapter inside the guest operating
system may not be sufficient to achieve the required performance. In these cases,
interrupt coalescing may need to be disabled on the virtual network adapter, either in
the virtual machine configuration or on the host. To disable interrupt coalescing on a
virtual Ethernet adapter, you need to modify the advanced parameter
ethernetX.coalescingScheme (where X is the number of the Ethernet adapter,
such as 0 or 1) and set it to disabled . The following example shows how you would
add the required advanced setting to disable interrupt coalescing for virtual Ethernet
adapter 0 in a virtual machine configuration using VMware PowerCLI:
Click here to view code image
Get-VM <VMName> | Set-AdvancedSetting -Name ethernet0.coalescingScheme
-Value disabled
Alternatively, you can add a line to the VM's advanced settings using the vSphere Client
or vSphere Web Client, as shown in Figure 8.2 .
Figure 8.2 Disable the virtual Ethernet adapter coalescing scheme.
If the VM was powered on at the time, the advanced setting is added, but the VM will
need to be shut down and powered back on in order for the setting to take effect.
 
 
 
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