Owners of Xiaomi, Redmi and Poco devices often face a situation where the once-wieldy interface begins to slow down, and applications are unloaded from memory minutes after they close. This is a direct signal that RAM is full of background processes and system debris. Modern MIUI shells and the new HyperOS consume significant resources to ensure the operation of widgets and services, which can lead to a shortage of free megabytes even on models with 8 or 12 GB of memory.
Freeing up resources isn’t just closing windows in task manager, it’s a comprehensive approach to configuring the system. Many users make the mistake of relying on just the standard Clean button, which often only redistributes processes without solving the root of the problem. In this article, we’ll break down deep optimization techniques, hidden developer settings, and virtual extensions to get your gadget back on track with maximum performance.
Android is designed to make free memory a waste of memory, but there is a fine line between useful caching and “eating” resources with heavy applications. Competent configuration will allow the MIUI system to work more stable, reduce the number of micro-freezes when switching between tasks and prolong battery life, since the processor does not have to constantly restart “heavy” programs.
The most obvious and accessible method that is often ignored or misused is the built-in Security app. It's not just an antivirus, it's a powerful system utility center deeply integrated into Xiaomi's shell. To quickly clean up, run the app, find a large Cleanup button or broom icon and click on it. The system will scan the cache, residual files and temporary data that take up space not only in storage, but also indirectly affect RAM performance.
But standard cleaning often doesn't close the background. To force RAM to go to the home screen or the menu of running applications, swipe up (or press the menu button if three-button navigation is enabled) and press the "X" or "Clear everything" button at the top of the screen, which will force the process that the system has deemed inactive, but which still hangs in the background.
⚠️ Warning: Continuous forced cleaning of all applications ("process killing") could backfire, causing system services to re-run, causing a spike in power consumption and a short-term drop in performance. Use full cleaning only when clear lags.
For a more subtle setup, go to the Security settings (usually three dots in the corner) where you can set up automatic memory cleanup when it reaches a certain threshold, such as 80%, to help maintain a balance between speed and multitasking without you being involved.
📊 How often do you clean your memory on your smartphone?
Only when everything's slowing down.
Once a week.
Every day.
Never clean.
Memory Extensions Management (Virtual RAM)
One of the key features in modern Redmi and Poco smartphones is RAM Extension Technology, which allows you to reserve a portion of the embedded storage (ROM) and use it as an additional RAM. You can find this feature along the way: Settings → Additional settings → Expansion of memory. Here you will see a switch and slider that adjusts the amount of memory you add (usually from 2 to 7 GB depending on the model).
Enabling this feature could be useful for budget models with 4 or 6GB of physical memory, allowing them to keep more applications open. However, for flagship devices with a fast LPDDR5 type of memory, using slow UFS storage as RAM can even reduce overall system responsiveness when actively multitasking.
The effect of memory expansion on the wear of the drive
Using ROM as RAM leads to intense data writing and overwriting. Although modern drives have a lot of resource, in theory it can accelerate the wear of flash memory in the long run (3-5 years of active use).> If your goal is to free up real RAM for heavy games, try disabling the expansion and restarting the device. The system will stop swaping (move) data to a slow disk, and all active processes will work exclusively on a fast physical memory chip, which often gives a more stable FPS in games. Settings for developers and process limitation For advanced users who want to gain full control over how MIUI has resources, there is a "For developers" menu. To activate it, go to Settings → About phone and quickly press 7 times on MIUI Version (or HyperOS). After the activation message appears, go back to the Additional Settings → For Developers menu. Here we are interested in the "Background Process Limit" section. The default is "Standard Limit", but you can limit the number of simultaneous background processes to 3 or 4. This is a tough method that will force the system to aggressively unload old applications from RAM, freeing up space for the current task. Also, it is useful to find the option "Do not save activity" (recommend for everyday use, only for testing) or animations. Reducing the scale of window animation, transitions and duration of the animator to 0.5x visually speed up the interface, although it will not physically free up a single megabyte of memory, but will reduce the load on the GPU. ☑️ Checklist optimization for developers Enable developer mode Find the limit of background processes Set the limit No more 4 Reduce the scale of animations to 0.5Completed: 0 / 4 Be careful about changing the settings in the "Developers" section. Incorrect changes can lead to unstable operation of individual applications or the system as a whole. If after the changes the phone began to behave strangely, just restart the device or reset the developer settings in the same menu. Memory consumption analysis and identification of problem applications are often the cause of a lack of free RAM It's not the system processes that are becoming, but the specific applications that have "memory leaks" or that are not working properly in the background. → Memory (the path may differ depending on the version of Android) can be seen the usage schedule and a list of applications that consume the most resources, VK, WhatsApp and browsers: They tend to store a huge amount of data in RAM. If you see that an application that you haven't used in the last hours takes hundreds of megabytes, it should be forcibly stopped. → Annexes → All applications, select the desired and click "Stop". Application type Average consumption RAM Recommended Action Social Media 300 - 800 Limit background activity of Navigators 200 - 500 Closing the MB after using the Game 1 - 3 Use Game Turbo (Game Turbo) System Processes 2 - 4 GB Do Not Touch (except cache) It's also worth checking the autorun of applications. The Security app has a "Permissions" or "Autostart" section. Turn off autorun for those programs that you don't need immediately after you turn on your phone. This will significantly reduce the initial load on RAM after the reboot.Using the "Second Space" mode and isolation Unique feature MIUI The second space allows you to create a completely isolated environment inside a smartphone. While this doesn’t free up memory directly, using a second space to work or play allows you to keep the main system clean of garbage and heavy workflows. By switching between spaces, you’re actually unloading all apps from the first profile, freeing up the first one. RAM This is a great way to separate personal and work without having to constantly reset your settings or use two different phones. ⚠️ Note: Creating a second space takes up an additional amount of permanent memory (ROM) It requires resources to support two sets of system processes, on devices with 64 GB of internal memory and 4 GB. RAM Creating a second space can impair overall productivity. If you do not use the space sharing function, make sure that it is turned off, as even in sleep mode it can reserve some system resources. Check this in the section Settings → Second Space. Radical measures: Reset and clean installation If the software methods do not help and the smartphone continues to work slowly, it is possible that deep errors or conflicts have accumulated in the system after many updates. In this case, the way to free memory and speed up the work is a full reset to the factory settings (Hard Reset). Before performing this procedure, be sure to back up important data via Mi Cloud or on the computer, as all data will be deleted. After resetting, the phone will return to the maximum speed of the "RAM" 💡Wipe Data is the only guarantee that hidden system errors cannot be fixed by a simple cache cleaning. After a reset, take your time to install all applications at once. Install them gradually by observing the behavior of the system. This will help identify the culprit if the memory problem recurs, and after the reset, the system will be busy indexing files and optimizing for several days, so don't be afraid of temporary heating or battery consumption. Frequently asked questions (FAQ) Is it true that constantly cleaning up memory speeds up the phone? No, it's a myth. Android manages the memory itself, and frequent forced cleaning forces the processor to waste resources restarting applications, which can even slow down and increase battery consumption. How much free memory should be normal on Xiaomi? It's normal for a modern MIUI 14 or HyperOS to have 20 to 40 percent RAM free. The system tries to fill the available RAM to run applications quickly, so 0 free megabytes isn't always a bad thing if the interface is running smoothly. Can a virus take up RAM? Yes, malware or miners can actively use CPU and memory resources. If you see unknown processes with high consumption, check the phone with an antivirus from Security or a third-party solution. Does crowded memory affect photo quality? Indirectly yes, if the camera application is clogged, it can process the image longer, work slower when switching modes, or even in high resolution.