在VM上调整VNIC的性能

1年前
2020年8月13日
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alona.
Nutanix员工
433回复

处理能力无休止地加倍，似乎，越来越贵。同时，应用程序的效率较少，因此需求越来越多地开发。所以螺旋生长。虽然在大多数情况下，它不是问题，并且在某些情况下不会影响您必须从环境中挤出性能的情况下影响。可能的场景包括：

流量数据包相对较大的VM或应用程序。
具有多个并发连接的VMS /应用程序，其中网络流量在同一主机的Guest虚拟机之间移动，跨主机的Guest虚拟机或主机本身或来自Guest虚拟机到外部系统。
为VINC RX数据包丢弃率增加提供缓解（每个KB 4540.- 在AHV中处理来自VNIC的数据包掉落的）招待会/主持人的CPU争夺已经排除在外。

对于那些特定的实例，有一个解决方案。

：感叹：这不是“涡轮增压”按钮。不要为所有VM使用此功能。

：感叹：首先排除其他争论来源。

升级到最新的AOS和Virtio并在之后监控您的环境的性能。

KB-8026 AHV |如何更改VNIC队列的数量并启用Virtio-Net多队列

\u200bProcessing power doubles endlessly, it seems, and become less and less expensive. Applications, at the same time, are developed with less of resources efficiency in mind and thus demand more and more resources. And so the spiral grows. While in most cases it is not an issue and performance is not impacted in some instances you have to squeeze performance out of your environment. Possible scenarios include:<\/span><\/p>

VMs or applications where traffic packets are relatively large.<\/span><\/li>\t
VMs\/apps with multiple concurrent connections, where network traffic moves between guest VMs on the same host, guest VMs across hosts or to the hosts themselves, or from guest VMs to an external system.<\/span><\/li>\t
To provide relief to vNIC RX packet drop rate increases (per\u00a0<\/span>KB 4540<\/span><\/a>\u00a0- Handling packet drops from vNICs in AHV<\/span>)<\/span><\/em>\u00a0where CPU contention of guest\/host has already been ruled out.<\/span><\/li><\/ul>
For those particular instances, there is a solution.<\/span><\/p>
\u00a0<\/span> $\":exclamation:\"$ This is not a \u201cturbo\u201d button. Do not use this for all your VMs.<\/span><\/p>
\u00a0<\/span> $\":exclamation:\"$ Rule out other sources of contention first.<\/span><\/p>
Upgrade to the lastest AOS and VirtIO and monitor the performance of your environment afterwards.<\/span><\/p>
KB-8026 AHV | How to change number of vNIC queues and enable virtio-net Multi-Queue<\/span><\/a><\/p>","quoteUsername":"Alona","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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