有一个古老的神话，您的Windows PC 将只使用其可用带宽的 80%，并且通过调整设置，您可以加快所有下载速度。这根本不是真的，更改相关设置可能会对您的 PC 功能产生不利影响。
在本文中，我们将解释这个神话的来源以及为什么应该避免更改“限制可保留带宽”设置。
什么是 QoS 数据包调度程序？
在Windows中，有一个称为QoS 数据包调度程序(QoS Packet Scheduler)的功能。它自Windows XP以来就存在，用于确定网络上某些流量的优先级。QoS代表“服务质量”。
从本质上讲，QoS 数据包调度程序(QoS Packet Scheduler)可确保您的操作系统（例如Windows 更新(Windows Update)）采取的高优先级操作获得更大的网络带宽份额。
默认设置为这些高优先级网络任务保留 20% 的连接带宽。许多应用程序可以使用这个保留的带宽，他们只需要告诉Windows流量是高优先级的。
这是踢球者。如果没有应用程序使用这 20% 的预留带宽，Windows默认会使其可用于其他应用程序。因此，在任何时候，您的 PC 始终使用 100% 的可用互联网带宽。
请记住，Microsoft主要将此功能用于零日安全补丁之类的事情，这些补丁可以保护您的操作系统免受恶意软件和其他安全威胁的侵害。
“限制可预留带宽”有什么作用？
限制可保留带宽(Limit Reservable Bandwidth)设置位于QoS数据包调度程序(QoS Packet Scheduler)组件中，允许您设置Windows将为重要网络功能保留的最大带宽。
最初的“tweak”表示，如果您将此设置更改为“0”，那么您的 PC 将允许您的应用程序使用总网络带宽，从而有效地加快您的 Internet 连接速度。然而，正如我们所见，这不是QoS功能的工作方式。
相反，将其设置为“0”将阻止您的高优先级应用程序先于低优先级应用程序访问带宽。这可能会导致您的应用程序响应速度变慢，并使您的体验变得更糟而不是更好。
从本质上讲，大多数人没有理由调整这个设置——尤其是在大多数地方的互联网性能比以往任何时候都好。更改它更有可能对您的体验产生负面影响而不是改善它，同时也会带来潜在的安全风险。
如何更改带宽限制
在Windows Home Pro中，您可以通过(Windows Home Pro)本地组策略编辑器(Local Group Policy Editor)更改带宽限制：
- 按Windows + R打开运行。
- 键入gpedit.msc并按回车键打开组策略编辑器(Group Policy Editor)。
- 在左侧菜单中，双击计算机配置(Computer Configuration )（如果下拉菜单不可见）。然后双击管理模板(Administrative Templates)>网络(Network)> QoS 数据包调度程序(QoS Packet Scheduler )以打开每个下拉菜单。
- 选择QoS 数据包调度程序(QoS Packet Scheduler )后，双击右窗格中的限制可保留带宽(Limit Reservable Bandwidth )。
- 单击已启用(Enabled)。现在，您可以调整默认值。在显示Bandwidth limit (%) 的地方输入您想要的数量。
或者，您可以通过Windows(Windows)注册表 更改可预留带宽设置。
- 通过在Run 对话框中键入(Run dialog box )regedit并按Enter打开注册表编辑器。
- 导航：
计算机HKEY_LOCAL_MACHINESOFTWARE策略MicrosoftWindowsPsched
- 如果 Psched 不存在，请选择Windows，右键单击右侧窗格中的某处，然后选择New > DWORD (32-bit) Value。
- 将其命名为Psched。您现在可以更改数值数据(Value data)下的默认可保留带宽百分比。选择确定(OK )以保存您的更改。
要更改为Windows 10(Windows 10)家庭版更新保留的带宽量，请执行以下操作：
- 按Windows 键(Windows Key )+ I打开设置(Settings)。
- 选择更新和安全(Update & Security)。
- 选择高级选项(Advanced options)。
- 滚动到底部并选择Delivery Optimization。
- 单击高级选项(Advanced options)。
- 在这里，您可以更改下载和上传设置的滑块，并调整您希望为更新保留的带宽量。
注意：(Note: )我们建议将这些值保留为默认值，除非您别无选择并且很好地理解了设置。
如何提高您的互联网速度
您可以使用多种安全方法来提高上传和下载速度(increase your upload and download speeds)。当您使用它时，这里有一些技巧可以通过避免带宽使用方面的常见错误来轻松获得更快的互联网，例如让您的(get faster internet easily)VPN运行。
如果您一直遇到问题，请尝试对慢速互联网(troubleshooting your slow internet)或 Wi-Fi 连接进行故障排除。
以正确的方式(Right Way)提高您的下载速度(Download Speeds)
无论出于何种原因，“限制可保留带宽”的神话已经持续了近 20 年。正如我们在本文中介绍的那样，除非您真的知道自己在做什么，否则最好不要理会此设置。无论哪种方式，我们都希望您可以安全地提高网络速度并恢复您所需要的一切！
What is “Limit Reservable Bandwidth” in Windows and Why You Shouldn’t Change It
There’s an old myth that your Windows PC will only use 80% of its available bandwidth, and that by tweaking a setting, you can speed up all of your downloads. This ѕimply isn’t true, and altеring the associated settings can have detrimental effects on your PC’s functioning.
In this article, we’ll explain where this myth came from and why you should avoid changing the “Limit Reservable Bandwidth” setting.
What is the QoS Packet Scheduler?
In Windows, there is a feature known as the QoS Packet Scheduler. It has existed since Windows XP and is there to prioritize certain traffic over your network. QoS stands for “Quality of Service”.
Essentially, the QoS Packet Scheduler ensures that high-priority actions taken by your operating system (such as Windows Update) get a larger slice of the network bandwidth pie.
The default setting reserves 20% of your connection’s bandwidth for these high-priority network tasks. Many apps can use this reserved bandwidth, they just have to tell Windows that the traffic is high priority.
Here’s the kicker. If no applications are using that 20% reserved bandwidth, Windows by default makes it available for other applications. So, at any one time, your PC is always using 100% of the available internet bandwidth.
Keep in mind that Microsoft primarily uses this function for things like zero-day security patches which can protect your operating system against malware and other security threats.
What Does “Limit Reservable Bandwidth” Do?
The Limit Reservable Bandwidth setting is found within the QoS Packet Scheduler component and allows you to set a maximum bandwidth that Windows will reserve for important network functions.
The original “tweak” stated that if you change this setting to “0”, then your PC will allow your applications to use the total network bandwidth, effectively speeding up your internet connection. However, as we’ve seen, this isn’t how the QoS function works.
Instead, setting it to “0” will prevent your high priority applications from accessing the bandwidth ahead of the low priority applications. This can result in your applications being less responsive and making your experience worse rather than better.
Essentially, most people have no reason to tweak this setting — especially with internet performance better than ever in most places. Changing it is more likely to negatively impact your experience rather than improve it, while also introducing potential security risks.
How to Change the Bandwidth Limit
In Windows Home Pro, you can change the bandwidth limit via the Local Group Policy Editor:
- Press Windows + R to open Run.
- Type gpedit.msc and hit enter to open the Group Policy Editor.
- In the left-hand menu, double-click Computer Configuration (if the drop-down menu isn’t visible). Then double-click Administrative Templates > Network > QoS Packet Scheduler to open each drop-down menu.
- With QoS Packet Scheduler selected, double-click Limit Reservable Bandwidth in the right pane.
- Click Enabled. Now, you can adjust the default values. Where it says Bandwidth limit (%) enter the amount you’d like.
Alternatively, you can change the reservable bandwidth settings via the Windows registry.
- Open the registry editor by typing regedit into the Run dialog box and pressing Enter.
- Navigate to:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Psched
- If Psched doesn’t exist, select Windows, right-click somewhere in the right-hand pane, and select New > DWORD (32-bit) Value.
- Name it Psched. You will now be able to alter the default reservable bandwidth percentage under Value data. Select OK to save your changes.
To change the amount of your bandwidth that’s reserved for updates in Windows 10 home, do the following:
- Press Windows Key + I to open Settings.
- Select Update & Security.
- Select Advanced options.
- Scroll to the bottom and select Delivery Optimization.
- Click Advanced options.
- Here, you’re able to change the sliders for both download and upload settings and adjust the amount of bandwidth that you’d like to reserve for updates.
Note: We recommend leaving these values at default unless you have no other choice and understand the setting well.
How to Increase Your Internet Speed
There are several safe methods you can use to increase your upload and download speeds. While you’re at it, here’s a handful of tips to get faster internet easily by avoiding common mistakes when it comes to bandwidth usage, like leaving your VPN running.
If you’re having consistent issues, try troubleshooting your slow internet or Wi-Fi connection.
Boost Your Download Speeds the Right Way
For whatever reason, the “Limit Reservable Bandwidth” myth has persisted for almost 20 years. As we’ve covered in this article, it’s best to leave this setting alone unless you really know what you’re doing. Either way, we hope you can safely improve your network speeds and get back to whatever you need it for!
