How to clean RAM on Xiaomi Poco X3 Pro

Poco smartphones, particularly the X3 Pro, are known for their high performance, but over time, even the powerful Snapdragon 860 processor can begin to experience difficulties with multitasking. This is often due to overflow of RAM, which does not have time to get rid of background processes. Users notice that applications reboot when switching, and the interface begins to slow down even on the desktop.

Android in the MIUI shell has its own resource management features that differ from the stock experience. Standard cleaning methods such as closing tabs or using an integrated booster often only give a temporary effect, since system services immediately take up vacant space. It is important for owners of the Poco X3 Pro to understand the difference between the cache of applications and the real processes occupying memory right now. Only an integrated approach will allow you to effectively manage resources without harming the stability of the operating system.

Analysis of the current state of RAM

Before you start to actively clean up, you need to diagnose and understand what exactly consumes your resources. MIUI hides a lot of processes that may not appear in the standard list of running applications. To get accurate information, you need to activate the developer mode, which will allow you to see the real picture of the download of RAM. Without this step, any manipulation will be in the nature of a blind cleaning, not eliminating the root of the problem.

To activate hidden features, go to Settings → About Phone and quickly click on MIUI seven times. Once you have been notified that you are a developer, go back to the main settings menu and select Additional and then For Developers. Here we are interested in the memory-related section. In some versions of the firmware, it is displayed separately, in others it is in the general list.

Special attention should be paid to the indicator “Memory is used” in comparison with the total amount. If there is less than 10-15% of the total amount of free memory, the system begins to aggressively unload applications, which causes lags. The table below shows the typical load values for various use cases of the Poco X3 Pro.

Analyzing this data, we can conclude that constantly cleaning to the minimum values is not always useful. Android is designed to keep frequently used applications in memory for quick launch. However, if the figures go off the charts even in simple, it is a signal of the presence of “bloated” processes or memory leaks.

Use of built-in MIUI Security tools

The standard Security app is the first tool users turn to, which allows you to quickly free up some of the memory by completing background processes. However, many underestimate the capabilities of this application, limiting it to just one “Clear” button.

Inside the app, go to Accelerate and click on the gear icon or settings menu, and you can set up a whitelist of apps that will never be forced to shut down. This is good for messengers, but it's bad for heavy games or rarely used programs that can hang in the background. Regularly reviewing this list helps keep RAM clean.

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Set up auto-cleaning in the Security app: Set a memory threshold where the system will automatically close the background applications when it reaches it, and this will prevent critical overflow of RAM during play.

Also worth paying attention to the feature "Memory Extension" (Memory Extension), which is available on some versions of the firmware for the Poco X3 Pro. It allows you to reserve some of the internal flash memory for the needs of RAM. Although this increases the available volume, the speed of such memory is lower than that of a real LPDDR5, which can lead to micro-freezes.

⚠️ Warning: Do not install third-party cleaners from Play Market. They often work more aggressively than built-in tools, constantly restarting system processes, which leads to increased battery consumption and heat up the Snapdragon processor.

The built-in booster can be improved by pre-close heavy applications manually through the recent task menu. Press the Menu button (three strips or swipe) and select Clear All, then run Accelerate. This dual approach sometimes yields slightly better results than just pressing a single button.

Disable MIUI Optimization for Advanced Users

One of the most effective but hidden settings for memory management is disabling MIUI Optimization, a feature that enforces permissions and background processes, often in conflict with Android’s native memory management mechanism. Disabling this option can dramatically change the behavior of the system, making memory management more transparent.

To access this setting, go back to the Developer Menu.Look for "Enable Optimization" MIUI» (Turn on MIUI If you try to turn it off, the system will need to restart. After turning on this option (paradoxically, but the switch works the opposite in some versions, or requires confirmation), the interface can become more “stock”, and the management of background processes will be controlled by pure Android.

It is important to understand the consequences: once optimisation is disabled, some features of the MIUI shell, such as themes or dual taps to turn on the screen, may stop working correctly. However, for tasks requiring maximum free RAM (emulators, heavy software), this is often the only solution.

If you notice instability after manipulation, the option can be returned to its original state. Remember that changing these settings affects the global behavior of the operating system. In some cases, you may need to reset application settings to factory values through the Apps menu → All Apps → Three Dots → Reset settings.

Managing Autoboot and Background Processes

Much of the RAM on the Poco X3 Pro is occupied by applications that run automatically with the system. Control over autoboot is a key point in optimization. Unlike pure Android, MIUI has a separate menu to manage this setting, although it is often hidden from the eyes of the average user.

To manage your boot, go to the app Security → Permissions → Autorun. This is a complete list of programs that start when you turn on your phone. It is recommended that you leave only system services and critical messengers (such as Telegram or WhatsApp) on if you need instant notifications. Everything else, including stores, social networks and games, should be turned off.

Also, check the background restrictions settings for each application. Go to Settings → Apps → All apps, select a heavy app (like Facebook or AliExpress) and find Battery or Energy Saving. Set a “Limit Background Activity” or “Strict Limit” mode, which will keep the app from hanging in RAM when you’re not using it.

⚠️ Warning: By disabling auto-start and background work for system applications (with or without a gear icon), you risk disrupting your phone.

Regularly checking the list of installed applications also helps to identify “parasites”; often users forget to delete old games or utilities that continue to update and take up RAM space with their services; removing unnecessary software is the easiest way to free up resources forever.

Cache reset and clean system temporary files

Although cache is formally stored in internal memory, excess memory can indirectly affect RAM, causing the system to index files more actively and keep more buffers open.Cache cleaning is a secure procedure that does not delete your personal data, but can speed up the operation of applications.

You can do a deep cleanup via the Recovery Mode. To do this, turn off the Poco X3 Pro, then press the power and volume buttons at the same time. In the menu that appears, select the language (if available) and the Wipe Data → Wipe Cache option. Don't confuse this with Wipe All Data, which will completely delete all your files! This method clears the system cache at the file system level.

You can also clear the cache of individual “heavy” apps through settings. Go to Settings → Apps → All apps, select, for example, Instagram or YouTube, and click Memory → Clear cache. This is especially effective for browsers and social networks that accumulate gigabytes of temporary data.

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Regular cache cleaning through Recovery Mode (once every 1-2 months) helps to keep the file system in good shape and indirectly improves the work with RAM.

Using the ADB command line (Android Debug Bridge) provides even more powerful cleanup options, but requires a connection to a computer. the adb shell pm trim-caches 999999999 command allows you to remove the cache of all applications at once if there is little free space on the phone, which also has a beneficial effect on the overall performance of the system.

Radical measures: resetting and reflashing

If the software methods don’t work and the Poco X3 Pro continues to suffer from memory shortages, it may be a problem with software bugs or “junk” left over from multiple updates, in which case the most effective solution is a complete factory reset.

Before performing the reset, be sure to back up your data via Mi Cloud or computer. Go to Settings → About Phone → Reset → Erase all data. After this procedure, the phone will return to the “out of the box” state and RAM will work with maximum efficiency, as all background processes will be reset.

For advanced users, custom firmware (such as LineageOS or Xiaomi.eu) is available for custom firmware installation. Castom firmware often lacks heavy MIUI system debris and manages memory much more efficiently. However, Poco X3 Pro firmware requires unlocking the bootloader, which may be temporarily unavailable due to Xiaomi policy, and risks turning the phone into a brick if mishandled.