Search Issue Tracker
By Design
Votes
1
Found in
2019.4
2020.2.2f1
2020.3
2021.1
2021.2
Issue ID
1311584
Regression
No
[Android] Memory fragmentation occurring upon loading a Scene
Reproduction steps:
1. Open the attached user's project "GoliathFromScratch.zip"
2. Switch to Android Platform
3. Open Android Logcat and switch to its Memory Profiler (Tools > Memory Window > Auto Capture)
4. Build for Android
5. Upon the App launch observe memory allocations while switching from "MainMenu" Scene and "Game" Scene with a button press
6. Note that the "PrivateOther" section grows significantly
Expected result: memory allocations are around 200MB
Actual result: memory allocations are around 600MB (see attached Results.png)
Reproduces on: 2019.4.24f1, 2020.3.4f1, 2021.1.2f1, 2021.2.0a12
Could not test on 2018.4.33f1 due to the project breaking when downgrading
Reproducible with these devices (Vulkan, OpenGLES 3, OpenGLES 2):
N/A, Samsung Galaxy S9 (SM-G960F), Android 8.0.0, CPU: Exynos 9 Series 9810, GPU: Mali-G72
VLNQA00316, Samsung Galaxy Note10 (SM-N970F), Android 9, CPU: Exynos 9 Series 9825, GPU: Mali-G76
VLNQA00024, Xiaomi Mi 5 (MI 5), Android 7.0, CPU: Snapdragon 820 MSM8996, GPU: Adreno (TM) 530
VLNQA00231, Huawei HUAWEI Mate 20 Pro (LYA-L29), Android 9, CPU: HiSilicon Kirin 980, GPU: Mali-G76
Could not test due to Android Logcat disconnecting whenever trying to look up the memory allocations:
VLNQA00318, Oneplus 7Pro (GM1913), Android 10, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
Add comment
All about bugs
View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.
Latest issues
- [HDRP] Game view renders artifacts when Camera's Component "Post Anti-aliasing" is set to "TAA" and Dynamic Resolution's "Forced Screen Percentage" is changed
- A deactivated Prefab's name color becomes white when a GameObject in the scene is deactivated
- The Game view becomes blank when using Frame Debugger with MSAA and Texture binding enabled in Play Mode
- Crash on dynamixel_sdk.dynamixel:groupSyncReadTxRxPacket when entering Play Mode after updating path to Dynamixel SDK in script
- NullReferenceException is thrown when changing the Inspector preview selection
Resolution Note (2022.1.X):
Tried the project on few devices with very different results:
- Galaxy Fold 2 - over 600MB
- Asus ROG Phone - a bit over 300MB
- Nokia 7 Plus - around 300MB
- iPhone X - over 500MB
- iPhone 6s - around 250MB
Unity memory usage should be jugged by Unity profiler, not by adb/xcode. The pattern above indicates, that memory usage highly depends on how powerful the device is and on the weakest device the figure is around the expected value. On mobile phones you can see apps using a lot of memory with OS not reclaiming it when there is lots of memory available and not required by other tasks. Sending app to background and launching something else that requires memory might reduce the usage.
It seems that you are looking for memory problems at a wrong place. Crash due to out of memory should be because of a lot of memory used by Unity and it should be visible in Unity profiler (unless you use some native plugins and allocate native on their own).