Xiaomi smartphone owners often face cryptic reports of memory overflows or notice that the virtual keyboard starts to work slower over time. When users search for information about what a keyboard memory is, they usually don’t mean a physical chip, but a software buffer that accumulates data to improve the print. This system is responsible for autocorrecting, predicting words and storing the history of the clipboard, which makes text input more comfortable but requires periodic maintenance.
Understanding how MIUI and HyperOS manage input application resources is critical to keeping the device running. If you ignore the accumulation of temporary files, the smartphone can start to hang around when typing messages or messengers. In this article, we will detail the structure of this data, explain the difference between the cache and the user dictionary, and provide step-by-step instructions for safe cleaning.
It is a mistake to assume that cleaning this data will delete your personal correspondence or passwords stored in the password manager of Google or Xiaomi Cloud.This is only about local temporary files that help the system predict the next word. Resetting keyboard settings does not delete the dictionaries learned by the cloud service if sync is enabled in the Google account.
What is hidden under the term "keyboard memory"
When it comes to the memory of an input application on Android smartphones, we're talking about a collection of several types of data, primarily the app cache, which contains temporary files that speed up the launch and rendering of the keyboard interface, a user dictionary that is created based on your typing style, commonly used words and abbreviations. The longer you use the device, the larger that volume.
There is also the concept of clipboard, which is often confused with the memory of the keyboard itself. Modern versions of the Gboard and the standard Xiaomi keyboard have a built-in function to save the history of copied text. This information is stored in the device's RAM before rebooting or in persistente storage until manually cleaned, taking up space and consuming CPU resources every time the screen is updated.
⚠️ Warning: Cleaning up the keyboard data will reset all your personalized settings, including panel layout, selected themes and local words learned.
It's important to distinguish between memory and performance. Even if an application takes 200 MB, it doesn't always mean a problem, but it's the fragmentation of the dictionary database or cache errors that cause input delays (lags), and periodic optimization is designed to combat these artifacts.
Data types: cache, dictionary and clipboard
To effectively manage your smartphone resources, you need to understand the differences between the main components that occupy space: cache is a temporary file that can be deleted without affecting functionality. User data includes learned words, keyboard height settings, vibrations and sounds. Cash buffer is a separate module that stores copied text.
Many users are unaware that the clipboard can store dozens of items unless an automatic cleanup is set up, putting a strain on the system, especially on budget Redmi or POCO models with limited RAM. Removing old items from the buffer is the fastest way to free up resources without losing personal input settings.
Below is a table showing the impact of different types of data on the system:
| Type of data | Impact on speed | Security of removal | Frequency of cleaning |
|---|---|---|---|
| Cash app. | High (when overflowing) | Completely safe. | Once a month |
| User-generated dictionary | Average (affects prediction) | Safe, but it will reset the training | When you have problems with autocorrection |
| buffer | Low (if there are few elements) | Safe (text will be deleted) | As necessary |
| Themes and styles | Minimum | Safe. | Rarely. |
If you look at this table, you can see that the most attention should be paid to the cache and the crowded buffer, and it is best to touch the dictionary only in extreme cases when autocorrection starts to work incorrectly or suggest inappropriate words.
How to Clear Cache and Keyboard Data on Xiaomi
The MIUI and HyperOS shell cleanup procedure is standardized, but it has its own nuances depending on the Android version. First, go to the device settings menu. Find the Apps section and select All Apps. In the list that opens, find your main keyboard, most often Gboard or Xiaomi Keyboard.
Once you log into the app menu, you'll see a Memory or Storage button, and there are two basic options available: Clear Cache and Clear Everything (or Reset), the first operation is safe and recommended for prevention, the second one will return the keyboard to factory status by deleting all your settings.
- 📱 Press Settings. → Annexes → All applications.
- 🔍 Find Gboard or Sogou (standard for China/Global).
- 🗑️ Choose Clear Cache for Quick Optimization.
- 🔄 Use Clean everything only if the keyboard freezes or does not turn on.
If you use third-party keyboards like SwiftKey or Yandex Keyboard, the path may be slightly different, but the logic remains the same.
⚠️ Before you reset completely, make sure you remember your Google account, as some settings may only sync after you re-authorize.
☑️ Check before resetting the input settings
Management of the clipboard and input history
The clipboard management is particularly important, as it often causes memory bloats. In modern versions of Gboard, the buffer history is preserved even after rebooting until the user manually cleans it, which is convenient but inefficient from an optimization point of view.
To access this section, open any type field to make the keyboard appear. On the top toolbar, find the clipboard icon (usually a piece of paper), and click on it, you'll see a list of saved items. If you hold your finger on the item, you can either fix it or delete it.
To completely clean up the history, follow the following steps:
- ✂️ Open the clipboard panel on the keyboard.
- ⚙️ Click on the edit icon or three dots in the corner.
- 🗑️ Choose the option to Delete Everything or Clear History.
- ✅ Confirm the action in the pop-up window.
Some users prefer to disable the history saving altogether, and you can do this in the settings of the keyboard itself in the section Additional → Clipboard, removing the tick from the item "Save in the buffer" and this will prevent the accumulation of garbage in the future.
Can I restore the remote clipboard?
Optimization of Gboard and system keyboard
For Xiaomi, Redmi and POCO smartphone owners, not only cleaning is important, but also setting up the right setup to minimize resource consumption. Google’s Gboard is considered a benchmark for optimization, but it can also be made easier, and it is recommended to disable unnecessary features such as GIF search, stickers and themes if you do not use them.
In the keyboard settings, go to the Additional section, and you can find the item "Delete learned words and data." This action will clear the local database that the keyboard builds based on your type style, which is useful if autocorrecting has started to work strangely or suggest words from another language group.
Also worth paying attention to is the use of hardware acceleration. In some versions of MIUI firmware, this feature can conflict with display drivers, causing flickering or delays. If you notice such problems, try updating the keyboard app through the Google Play Store or GetApps.
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Use the "Dark Theme" for the keyboard on AMOLED-Not only does this save battery power, but it also reduces the processor's heat during long-term typing, since the black pixels are not activated.
Solving problems with freeze and input lags
If the memory cleanup didn't help and the keyboard continues to slow down, the problem can get deeper. Often, third-party themes or fonts installed through the Theme app cause conflict. Heavy font graphics can overwhelm real-time text rendering.
Try to temporarily switch to standard font and classic theme. If the problem is gone, it was visual design, and it is also worth checking for system updates in the About Phone section. Xiaomi engineers regularly release patches that fix input bugs in specific versions of MIUI.
In extreme cases, if nothing helps, you can try to remove keyboard updates. To do this, in the application menu (where the Memory button is) click on the three dots in the upper corner and select Remove Updates. The system will roll back to the factory version, after which the application will need to be updated again through the store.
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Comprehensive cleaning (cache + buffer + dictionary) solves 90% of the problems with input lags on Xiaomi smartphones. If this does not help, look for conflicting topics or fonts.