System cache in the phone Xiaomi Redmi Note: what it is, how it works and when it needs to be cleaned

Have you ever noticed that your Xiaomi Redmi Note is slowing down, apps are opening longer and your battery is dropping faster than usual? It may be because of a clogged system cache, a hidden memory area that many users don't even know about. But what is it really like and why does its state affect smartphone performance so much?

System cache is not just junk files, as some people think; it's a temporary storage device that helps your phone run faster by storing frequently used information. However, over time, this cache can grow to giant sizes, taking up precious space and even causing crashes, a problem that is especially relevant for the Redmi Note line, where manufacturers often save on internal memory.

In this article, we will take a closer look at how the Xiaomi Redmi Note system cache works, when it really needs to be cleaned (and when it will only hurt), and what hidden MIUI features allow you to manage the cache more effectively than through standard settings. You will also learn how to distinguish useful cache from real digital junk and why some “optimizers” from Google Play can only make things worse.

What is a system cache and how it works in Xiaomi Redmi Note

In a simplified way, the system cache is like your phone's RAM, which is only designed to store the data you use for a long time, so when you first launch an app, it downloads all the files you need from scratch, and when you reopen it takes some of the data from the cache, which saves time and processor resources.

On Xiaomi Redmi Note smartphones (especially on models with MIUI 12/13/14), the cache is divided into several types:

• 📱 Dalvik cache – Optimized versions of installed applications (created with each update)
• 🗃️ System cache — Android kernel and shell data MIUI (includes graphic elements, fonts, animations)
• 📊 Application cache — temporary files of specific programs (for example, thumbnails in a gallery or cache of cards in Google Maps)

Fun fact: On the Redmi Note 10 Pro and later, some of the cache is stored in a special /cache partition that is not visible to the user without root rights. This partition is automatically cleared when you update the firmware, but can be clogged when you use features like Game Turbo or Second Space often.

The main problem with cache is that it never clears itself. Android is designed to allow users to periodically restart the device or update the firmware. But in reality, many Redmi Note owners do not turn off their phones for months, which leads to the accumulation of tens of gigabytes of unnecessary data.

Signs that the cache needs to be cleaned urgently

Xiaomi’s experienced users know that if a phone starts to behave strangely, 80% of the time it is the cache that is clogged. Here are 5 key symptoms that should alert you:

These problems are especially evident on the Redmi Note 8/9 with 64 GB of memory, where the user partition is already limited. For example, if you see in the storage settings that 50+ GB is occupied, but with installed applications on 15-20 GB, then the rest of the space was eaten by cache and junk files.

⚠️ Warning: Don’t confuse the system cache with application data! Deleting the com.android.vending cache (Google Play) will simply clear your search history, but cleaning the cache of system services like com.miui.home can lead to widgets resetting on the home screen.

How to Clean Cache on Xiaomi Redmi Note

There are 4 official ways to clean the cache on Xiaomi smartphones, and only one of them really deletes all temporary files. Let's take each option and indicate their pros and cons.

1. Through storage settings (the safest method)

This is a standard method that is suitable for most users:

1. Open the Settings → Memory
2. Click on Clean in the section "Junk files"
3. Select Cash and confirm the action.

The downside of this method is that it only clears the cache of user applications without affecting system files, but it is completely secure and does not require rebooting.

2. via the recovery menu (for deep cleaning)

This method removes all temporary files, including Dalvik cache:

Turn off the phone.

Press the power + Volume up

Choose a language (if required)

Go to Wipe & Reset → Wipe Cache

Confirm the action and wait for the completion

Reset the device-->

Important: This method resets some MIUI settings (e.g., regional settings) but does not affect user data. Use it if the phone is slowing down after a firmware update.

3. through the engineering menu (for experienced users)

Some Redmi Note models (such as the Note 11 Pro+ 5G) can use hidden commands:

#4636## → “Storage” → “Clean the cache”

This method clears the cache more thoroughly than standard settings, but can cause short-term lags after a reboot.

4.Through ADB (for Advanced)

If you are familiar with Android Debug Bridge, you can run the command:

adb shell pm trim-caches 1000000000

This command compulsorily clears the cache of all applications larger than 1 GB. Use with caution!

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After deep cache clearing via Recovery or ADB, give the phone 10-15 minutes to re-index the files, during which time it can run slower than usual - that's okay.

What happens if you clear the cache: myths and reality

There are a lot of myths about cache cleaning on the Internet, and let's look at what's true and what's dangerous.

• ✅ Truth: Cache clearing frees up disk space (sometimes up to 5-10GB on Redmi Note 10S with active use)
• ✅ Truth: After cleaning some apps will be loaded longer for the first time (they recover their cache)
• ❌ Myth: “Cache cleaning speeds up the phone forever” – the effect is temporary, if not eliminate the cause of its overflow
• ❌ Myth: “Cache can be cleaned every day” – frequent cleaning causes the system to waste resources on re-cache creation

The myth of "magic acceleration" is particularly dangerous, and in practice, after cleaning the cache, the Redmi Note 9 Pro may even become slower for 1-2 days until the system recovers the necessary temporary files, but after a week you will notice that:

• 📉 Applications open more stable (no sudden closures)
• 🔋 Battery holds on to 10-15% longer
• 📱 Phone heats up less when loaded

⚠️ Warning: Never use Google Play's "cache optimizers" like Clean Master or CCleaner. These programs often delete not only the cache, but also important system files, which can lead to loss of camera or sensor functionality on the Xiaomi Redmi Note. MIUI has built-in cleaning tools, which are quite enough.

How to prevent refilling the cache

Cleaning the cache is like cleaning the room: if you don't clean the system, it'll be littered again in a week, here are 5 ways to keep the cache under control:

1. Turn off automatic app updates in Google Play. Each update creates a new Dalvik cache.
2. Limit background activity for unnecessary applications in Settings → Apps → Permissions → Auto Run.
3. Use lightweight versions of apps (e.g. Facebook Lite instead of the main client).
4. Reboot your phone regularly (at least once every 3 days) and this resets temporary files in your memory.
5. Turn off MIUI animations in Settings → About Phone → MIUI version (click 7 times, then in Additional → Animation select 0.5x).

For owners of Redmi Note 12 and later, there is an additional life hack: activate the Smart Clean function in Settings → Memory → Settings. This feature automatically removes unused cache once a week, but at the same time saves data from frequently used applications.

Features of working with cache on different models of Redmi Note

Not all Redmi Notes handle cache the same way, but here are the key differences to consider:

On the Redmi Note 10 Pro and later, there is a hidden Storage Sense feature that automatically clears the cache when there is a shortage of space.

1. Enable Developer Mode (7 taps by build number)
2. Go to Settings. → Additionally. → Storage Sense
3. Set a threshold value (for example, 1 GB of free space)

For models with AMOLED- screens (e.g. Redmi Note 11 Pro+ 5G), it is important to clear the graphics driver cache, otherwise artifacts may appear when scrolling.

adb shell dumpsys SurfaceFlinger --reset

Frequent Cache Mistakes and How to Avoid Them

Many Xiaomi users make the same mistakes when trying to “optimize” their phone, and here are the TOP-3’s most dangerous actions and their consequences:

• 🚫 Delete the /cache folder manually through the file manager → can result in a bootloop (cyclic reboot)
• 🚫 Use of fastboot erase cache commands on locked bootloader → device brick (complete failure)
• 🚫 Cleaning the cache of system applications like com.android.systemui → resetting all widgets and interface settings

It is especially dangerous to experiment with a Redmi Note cache with a locked bootloader, for example, trying to clean boot.img via TWRP on the Redmi Note 8T will result in a complete loss of device performance without the possibility of recovery through standard means.

If you still encounter problems after cleaning the cache, try:

1. Download in Safe Mode (shut down Power → Boot in Safe Mode)
2. Perform a reset via Settings → About Phone → Resetting (without deleting data)
3. Fly your phone through the Mi Flash Tool with the Clean All option

⚠️ Warning: On the Redmi Note 5/6/7 with Qualcomm Snapdragon 4xx/6xx processors, clearing the cache through informal recovery (like OrangeFox) can result in a loss of IMEI. Always use official recovery from Xiaomi for these models.

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Regular cache cleaning (1 time per month) + disabling background activity of unnecessary apps can increase Xiaomi Redmi Note battery life by 15-20% without losing performance.

FAQ: Answers to popular questions about cache in Xiaomi Redmi Note