Cleaning up RAM on Xiaomi Redmi Note 9: the full guide 2026

Xiaomi Redmi Note 9

brakes due to overloaded RAM

MIUI

Facebook

TikTok

Android 10/11

Redmi Note 9

3–6 GB of RAM

Many users mistakenly believe that cleaning RAM is simply clicking the “Clear” button on the multitasking menu, which in practice has a short-term effect, and sometimes even impairs performance due to rebooting system processes. In this article, we will analyze 7 proven methods - from built-in tools MIUI 12-14 to hidden features and secure third-party utilities, and we will pay special attention to the nuances specifically for the Redmi Note 9, including the Note 9 Pro models, 9S and 9T.

Important: All methods are tested on current firmware versions (up to MIUI 14.0.5 inclusive). If your phone is running on an older version, update the software first through Settings → About Phone → System Update.

1. Built-in cleaning through "Safety" (method for beginners)

The easiest way is to use the built-in Optimization tool in the Security app, which closes the background processes and frees up to 30-40% of RAM without risk to the system.

1. Open the Security app (the shield icon).

2. Go to the Optimization tab (or Acceleration in older versions of MIUI).

3.Click "Clean" - the system will show how much memory is freed up.

⚠️ Warning: Do not use this method more than 1 time every 2-3 hours. Frequent forced cleaning causes applications to reboot, which increases battery consumption by 10-15% due to re-initiation of processes.

• ✅ Pros: does not require root rights, is safe for the system.
• ❌ Cons: Cleans only user processes, system processes remain active.
• ⚙️ Nuance: On the Redmi Note 9 Pro with 6 GB of RAM, the effect is less noticeable than on the base model with 3 GB.

2 Manual cleaning through the multitasking menu

The classic way that everyone knows but few people use it correctly. On the Redmi Note 9, the multitasking menu opens with a swipe upwards with a delay of 0.5 seconds (not a quick move!).

1. Scroll through the open applications left/right.

2.Click on the “Secure” icon (pin icon) for important apps (like Telegram or Google Maps) – they won’t close when cleaned.

3. Swipe up close unnecessary applications one at a time (do not use the “Close All” button!).

⚠️ Attention: Redmi Note 9 with MIUI 12+ The Close All button doesn't clean the RAM completely, it just hides the apps from the list.

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If swipe up doesn't open up multitasking, check your gesture settings: Settings → Display → Full-screen → Gestures. The Redmi Note 9 has MIUI gestures enabled by default, not Android.

3. Hidden function "Extended Cleaning" (only for MIUI 13/14)

Newer versions of the firmware have a hidden cleaning mode that removes the cache of system processes, activated through the engineering menu:

1. Open the Phone application and enter the code:

##4636##

2. Go to the tab "Use Statistics".

3. Click "Clear Cache" in the upper right corner.

This method frees up to 500-800 MB of RAM, but has a limitation: it only works if the free memory is less than 1 GB. If you have more, the system will show the message “Cleanup is not required”.

4.Using Greenify for hibernation of applications

Greenify is one of the few apps that doesn’t just shut down processes, but puts them into sleep mode, which is especially useful for the Redmi Note 9, where background processes on Facebook, Instagram or MIUI Daemon can take up to 1.5GB of RAM.

Instructions:

1. Install Greenify from Google Play.
2. Launch the application and provide access to special features (in Android settings).
3. Add to the hibernation list applications that should not work in the background (e.g. AliExpress, Wildberries, games).
4. Activate the option “Aggressive hibernation” (you need to buy a Pro version).

⚠️ Note: Do not add Xiaomi system applications with the prefix com.xiaomi. or com.miui to Greenify. this may result in loss of push notifications or malfunctions. MIUI.

Close all important applications | Make a backup of data | Check the hibernation list for system processes | Disable battery optimization for Greenify-->

5. Cleaning through ADB (for advanced users)

If standard methods don’t work, you can manually kill unnecessary processes through Android Debug Bridge (ADB), which requires a PC and a little technical knowledge, but gives you complete control over RAM.

Steps:

1. Turn on USB debugging on your phone: Settings → About Phone → MIUI version (click 7 times until the message “You’re a developer” appears). Then go back to Settings → Additional → Developer → Debugging on USB.
2. Connect the Redmi Note 9 to your PC and open the command line in the folder with ADB.
3. Execute the command to view active processes: adb shell ps -A | grep -E 'u0_a[0-9]+'
4. To kill the process (e.g. Facebook), use: adb shell am force-stop com.facebook.katana

List of popular cleaning processes:

• 📱 com.facebook.orca — Facebook Messenger
• 🎵 com.spotify.music – Spotify (if not used)
• 📺 com.netflix.mediaclient — Netflix
• 📊 com.miui.analytics – Xiaomi Analytics (can be turned off)

6. Optimizing the Autoboot of Applications

Many of the apps on the Redmi Note 9 run automatically when you turn your phone on or connect to the Internet, and this is one of the main reasons for RAM overload.

1. Go to Settings → Applications → Application Management.

2. Select an application (such as AliExpress) and click AutoStart.

3. Turn off all switches: "Autostart", "Secondary Start" and "Show notifications".

⚠️ Note: Redmi Note 9 Pro with MIUI 14 Some system applications (e.g. Mi Video or Mi Music) cannot be disabled via the standard menu. ADB Shizuku.

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Disabling autoboot for the 5-7 most voracious applications (social networks, instant messengers, games) can free up to 1 GB of RAM after restarting the phone.

7. reset partition cache (last chance before reset)

If RAM is clogged because of a corrupted system application cache, partition cache resetting will help, a method that does not delete user data, but requires a reboot.

Instructions:

1. Turn off the Redmi Note 9.
2. Press the power button + volume up until the MI logo appears.
3. From the Recovery menu, select Wipe & Reset → Wipe Cache (use volume buttons for navigation, power button for selection).
4. Confirm the action and wait for the completion.
5. Restart your phone through Reboot → System.

After this procedure, the first start of the system will take 20-30 seconds longer, but the RAM will be cleared of debris.

FAQ: Frequent questions about cleaning RAM on the Redmi Note 9