Random access memory (RAM) is a key component that determines the speed of your Android device. When RAM is full of background processes, applications begin to slow down and the system begins to freeze. But simply closing all apps through the task manager is not enough: many processes continue to hang in memory, consuming resources. In this article we will analyze all possible ways from basic to advanced, including hidden settings and commands for advanced users.

It is important to understand the difference between cleaning RAM i freeing up storage space. The first affects performance “here and now”, the second affects the long-term operation of the system. We will focus specifically on RAM, but at the same time we will show how these two processes are connected. Some methods require rights developer or ADB, but most are suitable for any smartphone - from Samsung Galaxy A10 to Google Pixel 8 Pro.

Why Android “eats” RAM and when it needs to be cleared

Android by default tries to load the RAM as much as possible so that frequently used applications open faster. This is normal system behavior, but sometimes it leads to problems:

  • 📱 Lags and freezes when switching between applications (especially on devices with 2–4 GB RAM).
  • 🔋 Increased consumption batteries due to background processes that cannot terminate.
  • 🚫 Automatic closing of applications (for example, the music is interrupted when you open the messenger).
  • 🔄 Restarting the interface (the launcher or system menus slow down).

Clear RAM is not neededif:

  • ✅ The device operates stably, despite high memory load (Android itself optimizes processes).
  • ✅ You use flagship with 8+ GB RAM —the memory reserve allows you not to worry about manual cleaning.
  • ✅ Lags occur only in a specific application (the problem may be in it, not in the system).
⚠️ Attention: Frequent forced cleaning of RAM can worse performance. Android is designed to cache data in RAM - this speeds up the re-launch of applications. Manually freeing memory only makes sense in case of obvious failures.

If you notice that the phone began to slow down after updating the system (for example, before Android 14), the problem may lie in unoptimized software. In this case, clearing RAM will give a temporary effect, but it is better to wait for a patch from the manufacturer or roll back to the previous version.

📊 How often do you clear RAM on your Android device?
Never clear
Once a week
Only when the phone slows down
Constantly, through special applications

Method 1: Built-in task manager (the simplest method)

All modern versions of Android have a built-in tool for managing running applications. It does not clear RAM completely, but closes unnecessary processes, freeing up some memory.

Instructions:

  1. Open recent applications (swipe up from the bottom edge of the screen and hold or the "square" button on the navigation bar).
  2. Click on the icon "Close all"** (usually at the bottom of the screen) or swipe up on each application separately.
  3. On some firmware (for example, MIUI or One UI) there is a button "Clear memory"** - it removes background processes.

This method works on 99% of devices, but has limitations:

  • 🔄 Does not close system processes (for example, Google Play services).
  • 📌 Does not clear RAM cache, which takes up to 30% of memory.
  • 🔙 After clearing, applications will take longer to launch the next time you open them.
💡

On devices Samsung hold the "Close all" button - the option to deep clean memory will appear (not available on all models).

For deeper cleaning, go to Settings → Applications → Running (the path may differ depending on the firmware). Here you will see a list of all active processes and can force stop unnecessary ones. Be careful: stopping system services (for example com.android.systemui) can lead to interface crash.

Method 2: Using developer mode to force cleaning

If standard methods do not help, you can use hidden Android functions. To do this, you first need to activate developer mode:

  1. Go to Settings → About phone.
  2. Find the item "Build number"** and click on it 7 times in a row (a notification “You became a developer")
  3. Return to the main settings menu - a new section will appear there "For developers"**.

Now you can forcefully limit background processes:

  • 🛠️ In the For developers section, find the option "Do not save actions"** (Don't keep activities). When activated, Android will automatically close applications when exiting them. Minus: Multitasking will stop working.
  • 🔄 Option “Process limit” (Process limit) allows you to manually limit the number of background processes. Select "Maximum 2 processes" for aggressive cleaning (not recommended for everyday use!).
  • 🚫 "Stop all applications"** (Stop all apps) - emergency button to close all user processes.
⚠️ Attention: Changing parameters in mode developer can lead to unstable system operation. For example, limiting processes to 1-2 will cause constant application reboots. Use these settings only for diagnostics!

For devices with root access in developer mode, an option is available "USB debugging"**that allows you to execute commands for deep cleaning through ADB . For example:

adb shell am kill-all

This command forcibly terminates all user processes, but does not affect system ones.

Method 3: Clearing RAM via ADB (for experienced users)

Android Debug Bridge (ADB) is a tool for low-level device control via a computer. With its help, you can perform complete clearing of RAMincluding system processes that are not accessible through the standard interface.

What you will need:

  • 💻 Computer with installed ADB Tools (part Android SDK).
  • 📱 Enabled USB debugging on the phone (see previous section).
  • 🔌 Cable USB Type-C (preferably original).

Step-by-step guide:

  1. Connect your phone to the computer and confirm permission to debug.
  2. Open command line (Windows) or terminal (macOS/Linux) in the folder with adb.exe.
  3. Run the command to test the connection: 
    adb devices

    The serial number of your device should be displayed.

  4. To clear RAM, use: 
    adb shell echo 3 > /proc/sys/vm/drop_caches

    This command resets the memory cache without closing processes. For complete cleaning, add:

    adb shell killall -9 com.android.systemui

    (restarts the system interface).

Command echo 3 > /proc/sys/vm/drop_caches is the only way to completely reset the RAM cache without rebooting. It works on all devices with the Linux kernel, but requires superuser rights (root) or ADB with an unlocked bootloader.

ADB Command Action root access required?
adb shell am kill-all Closes all user applications ❌ No
adb shell echo 3 > /proc/sys/vm/drop_caches Clears the RAM cache (does not close processes) ✅ Yes
adb shell pm clear-package com.example.app Clears application-specific data (including RAM) ❌ No
adb shell reboot Rebooting the device (completely clearing RAM) ❌ No

If after executing the commands the phone becomes unstable, reboot it manually. Some manufacturers (for example Huawei or Xiaomi) block some ADB commands - in this case, only unlocking the bootloader will help..

What to do if ADB does not see the device?

1. Check if USB debugging is enabled in the developer options. 2. Install drivers for your phone model (download from the manufacturer’s website). 3. Try a different USB cable (cheap cables often do not support data transfer). 4. Restart your phone and computer.

Method 4: Applications for cleaning RAM - do they help?

There are hundreds of applications that promise to “speed up your phone in 1 click.” Most of them are Google Play hundreds of applications promising to “speed up your phone in 1 click.” Most of them are dummieswhich simply close background processes (the built-in task manager does the same). However, there are also useful tools with advanced functions.

Top 3 tested applications:

  • 🔧 Greenify - does not clear RAM directly, but “freezes” unnecessary applications, preventing them from running in the background. It works without root, but with root it gives more options.
  • 📊 Simple System Monitor —shows detailed statistics on RAM usage and allows you to manually close processes (including system ones, if there is root).
  • 🚀 SD Maid —cleanses not only RAM, but also garbage in the storage. There is a function «CorpseFinder»**that deletes residual files of deleted applications.

How to use such applications correctly:

  1. Do not press the button «Boost» or "Clear" too often - this will only slow down the phone.
  2. B Greenify Add to sleep mode applications that should not run in the background (for example, games or rarely used instant messengers).
  3. B Simple System Monitor Sort processes by RAM usage and manually close those that take up >100 MB (but don't touch system ones!).
⚠️ Attention: Applications like Clean Master or CCleaner often contain advertising modulesthat themselves consume RAM. In addition, they can delete important data (for example, messenger cache). Use only proven utilities from the list above.

If you decide to install a RAM cleaner, monitor its behavior in the first days. Some apps (especially from little-known developers) can:

  • 🔄 Run in the background, consuming memory.
  • 📢 Show aggressive advertising.
  • 🔓 Request unnecessary permissions (for example, access to SMS).

Do not install cleaners from unverified sources|Check reviews and ratings on Google Play|Do not give the application access to SMS or contacts|Disable auto-start of the cleaner at system startup|Regularly check how much RAM the application itself consumes-->

Method 5: Reboot in safe mode for diagnostics

If the phone slows down even after clearing the RAM, the problem may be conflicting application or a virus. To check this, boot the device into safe mode —it disables all third-party apps, leaving only system ones.

How to start safe mode:

  1. Hold button poweruntil the shutdown menu appears.
  2. Hold your finger on the option “Shutdown”** (on some phones - “Reboot”).
  3. Confirm switching to safe mode (a notification will appear).

In safe mode:

  • 🔍 Check if there are any lags left. If not, the problem is in one of the installed applications.
  • 📊 Open Settings → Applications and sort the apps by installation date. Remove suspicious ones (especially those that you did not install).
  • 🛡️ Run a virus scan (for example, through Malwarebytes).

To exit safe mode, simply reboot phone. If the problem has disappeared, but you do not know which application is to blame, use the elimination method:

  1. Uninstall all apps installed in the last 2-3 weeks.
  2. If the lags are gone, install them one by one, checking the system's response.
  3. If the problem persists, the firmware or hardware malfunction is to blame.

On some devices (for example, Samsung or LG), safe mode can be enabled via hardware buttons:

  1. Turn off the phone.
  2. Hold Power button + volume downuntil the logo appears.
  3. Release the buttons when you see the inscription «Safe Mode»** at the bottom screen.

Method 6: Resetting the partition cache (without data loss)

The partition cache (/cache) stores temporary files that are used by the system and applications. Over time, it can become clogged, which leads to memory leaks cleaning it up. partition will not delete your data, but can solve problems with RAM.

Instructions:

  1. Turn off the phone.
  2. Hold down the combination of buttons to enter recovery (depending on the model):
    • 📱 Samsung: Power + Volume up + Bixby (or Home on older models).
    • 📱 Xiaomi/Redmi/Poco: Power + Volume up.
    • 📱 Google Pixel: Power + Volume down, then select Recovery Mode.
  • In the recovery menu, select «Wipe cache partition»** (button control volume, confirmation - power button).
  • After cleaning, reboot the phone («Reboot system now»**).

    • This method helps if:

    • 🔄 The phone began to slow down after updating the system.
    • 📱 Applications constantly crash with an error "Not enough memory"**.
    • 🔋 The battery drains faster than usual (a clogged cache increases the load on the processor).
    ⚠️ Attention: Do not confuse «Wipe cache partition» s «Wipe data/factory reset»The second option will completely reset the phone to factory settingsby deleting everything. data.

    On some devices (for example, OnePlus or Oppo) instead standard recovery is set to custom, where the option to clear the cache may have a different name: «Clear Cache» or «Advanced → Wipe Cache». If you are not sure, take a photo of the menu before selecting the item.

    After clearing the partition cache, the first start of the phone may take longer - this is normal. The system restores the necessary files. will stabilize, and you will notice that RAM is used more efficiently.

    Method 7: Extreme measures - reset to factory settings

    If none of the methods helped, and the phone still slows down due to lack of RAM, it remains full resetThis will delete all data, but return it to the device. initial performance. Use this method only as a last resort!

    How to reset your phone without losing important data:

    1. Make a backup:
      • 📁 Contacts, SMS and call logs - via Google Account (Settings → Google → Backup).
      • 📷 Photos and videos - copy to your computer or to Google Photos.
      • 🎮 Application data - use built-in tools (for example, Titanium Backup for root devices).
  • Go to Settings → System → Reset settings.
  • Select "Delete all data" (on some phones - "Reset to factory settings").
  • Confirm the action and wait for the reboot (may take 10-30 minutes).

    • After reset:

    • ✅ Install only necessary applications (excess apps are the main reason for lack of RAM).
    • ✅ Disable autostart of unnecessary services (Settings → Applications → Autorun).
    • ✅ Clear the application cache regularly (Settings → Storage → Cache data).

    If, even after resetting, problems with RAM remain, this may indicate:

    • 🔧 Hardware wear (for example, degraded flash memory, which affects swap).
    • 📉 Lack of RAM for your tasks (on devices with 2–3 GB of memory, modern applications work with difficulty).
    • 🐛 Firmware error (relevant for custom ROMs or beta versions of Android).

    In such cases, only replacing the device or installing light firmware will help (for example, LineageOS without Google services).

    💡

    Resetting to factory settings is the last chance to return the phone to working order. If problems with RAM remain after it, the hardware or an unsolvable software error is to blame.

    FAQ: Frequently asked questions about cleaning. RAM on Android

    ❓ Why do applications take longer to launch after clearing RAM?

    Android caches frequently used data in RAM to speed up its restart. When you manually clear RAM, the system has to load everything again, which takes longer - do not clear memory unnecessarily!

    ❓ You can. Is it possible to clear RAM without rebooting?

    Yes, using ADB commands or applications like Greenify. However, full cleaning (including system processes) is only possible through a reboot or command echo 3 > /proc/sys/vm/drop_caches (requires root).

    ❓ How much RAM should be free for normal operation?

    Android is not designed to work with “empty” RAM - the system always tries to fill it with cache Normal state:

    • 📱 2–3 GB RAM: free 300–500. MB.
    • 📱 4–6 GB RAM: free 500–1000 MB.
    • 📱 8+ GB RAM: free 1–2 GB.

    If there is free memory less than 100 MB, this is critical - the phone will start to slow down.

    ❓ Do “RAM boosters” from Google Play help?

    Most of these applications are useless. They simply close background processes, which Android does automatically when there is not enough memory. The exception is Greenifywhich really reduces the load on the system by “freezing” unnecessary applications.

    ❓ Why did you run out of RAM after updating Android?

    New versions Android (for example, Android 13/14) require more resources. In addition, manufacturers often add their own shells (for example, One UI or ColorOS), which consume additional memory. If after the update the phone starts to slow down, try:

    1. Clear the partition cache (see Method 6).
    2. Disable animations in the developer settings.
    3. Install a light launcher (for example, Nova Launcher).