Delete Android cache – that’s behind it

Android rooting, firmware flashing, no problem if you know what the mysterious "clear cache" is all about. We'll tell you when to clear what Android cache and what the cache is all about.

For the purposes of this article, we assume that you know what rooting an Android device is all about.

Android Caches: The Facts

There is a lot of talk about Android caches, also a lot of nonsense.¬†So first the facts: As on any computer system, the Android caches are a cache in the operating system and¬†programs¬†can store data.¬†Mostly it’s about accelerating the work of the system.¬†This universally valid rule¬†applies to Android caches as well as the browser cache and the Windows Prefetch cache, the various Tuning tools “optimize”.

Tip: If you guessing as “cache” as is ever pronounced correctly, click but at times¬†Leo on the play button to the left of the term.

These caches uses Android

Android knows two caches: The cache partition and the Dalvik cache:

  • The¬†cache partition¬†hangs as / cache in the directory tree.¬†This is where temporary data ends up.¬†For example, the Youtube app will save videos from the channels you subscribe to here.¬†This will allow you to watch the videos even when you are not online.
  • The¬†Dalvik cache¬†can be found in / data / Dalvik-cache in the directory tree.¬†Whenever you use an app, Android will dump specially crafted (“compiled”) code here.¬†More specifically: Until Android 4.x, the Android¬†Dalvik VirtualMachine¬†function¬†compiled¬†a portion of the code each time an app was launched.¬†Since Android 5¬†AndroidRuntime¬†takes over¬†this task already during the installation of an app.¬†The result is also stored in the Dalvik cache directory.

The contents of both caches can be safely deleted. You lose no personal information. However, data may need to be downloaded again. The regeneration of the Dalvik cache also costs a few minutes time, especially from Android 5.

Delete Android cache: That’s how it works

Some users simply delete the Android caches according to the motto “Much helps a lot” and give away so much time.¬†Others do nothing and deal with problems, especially unstable apps.¬†How to do it right we show with the widely used custom recovery called ClockworkMod Recovery.¬†Only in recovery mode, the emptying of the caches succeeds.

  1. ClockworkMod Recovery displays “wipe cache partition” directly in the main menu.
  2. The deletion (English “wipe”) of the Dalvik cache is hidden in the menu “advanced”.
  3. You must be careful with the “Wipe data/factory reset” option.¬†It really erases all your data from the device.

Rules of thumb for deleting

In most cases, the developers of custom ROMs indicate in the release notes (“Release Notes”) which wipes are to be performed.¬†If nothing is found, you are on the safe side with these rules of thumb:

  1. If you change the ROM, for example, from the manufacturer-installed Android over to CyanogenMod, you should first select “Wipe data/factory reset”.¬†This reliably prevents any problems that may be caused by the legacy of the original ROM.¬†Remember to bring your data stored on the device to safety first.
  2. If you’re doing a major ROM update, for example, from Android 5 to 5.1 or CyanogenMod 11 to 12, you can play poker and leave it with the wipe of Cache and Dalvik cache.¬†But sometimes this can be a problem.¬†If you want to exclude them from the outset, you should also use “Wipe data/factory reset” here.
  3. Small ROM updates, for example, the jump from one Cyanogenmod Nightly to the next, are handled simply by the combination of “wipe cache partition” and “advanced> wipe Dalvik cache”.

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