Engine(5.5.0) taking up more than 150GB (Linux)

Development Getting Started & Setup
1

Hi all,

I’ve noticed Unreal Engine is filling up my drive pretty quickly.
When I first installed it, it was taking about 65GB. After some days spent working on a project I noticed my system was slowing down a bit (I have the engine on the same drive in which is installed the OS) and it is now about 150GB.

The directories that contains the most data are (these are in the engine directory, not project):

  • Engine/Intermediate ~22GB
  • Engine/Binaries ~70GB
  • Engine/Source/ThirdParty ~29GB
  • Engine/Plugins ~28GB

Also, I read older posts on this topic but they were fairly old and were all about DerivedDataCache that is basically empty on my end.

How can I save some space? Or as a last resort, can I move some of those folders in another drive?

UE: 5.5.0 built from source

2

Hey pal you have installed 5.5 from source ?
Do you face any errors ?
I am facing this compilation errors. Could you help me ?

Screenshot_from_2024-11-24_22-10-45
Screenshot_from_2024-11-24_22-10-451044×587 181 KB

3

I got some errors, don’t remember which ones in particular, just issue sudo make install again and it will resume and compile the rest

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4

Update: after having worked on another small project the Engine is now 175GB. Something is not right.

  • 29G ./Source
  • 21G ./Intermediate
  • 81G ./Binaries
  • 28G ./Plugins

Can someone help please?

5

While 5.4 used to work fine, and 5.5 Preview 1. Now with the latest code from the 5.5 branch, I also get those errors. It seems somehow UBT enables the Intel SPMD compiler and that’s why it fails:

#if INTEL_ISPC
include “NiagaraDataInterfaceVectorField.ispc.generated.h”
#endif

0>GeometryCollectionComponent.cpp(94,10): Error : ‘GeometryCollectionComponent.ispc.generated.h’ file not found
0> 94 | include “GeometryCollectionComponent.ispc.generated.h”
0> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0>1 error generated.

6

OK, figured it out. It seems there’s an option for it inside the Target files. I added the following to both my Game and Editor Target.cs and the engine now builds fine:

    // Disable Intel Implicit SPMD Program Compiler forced by UE 5.5 on Linux.
    bCompileISPC = false;
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