UE5 provides a variety of Profile memory (Memory) methods.
memreport -full
Enter memreport -full on the cmd command line
The memory report file will be output to Saved\Profiling\MemReports\XXX.memreport
Open XXX.memreport with text file
Physical memory and virtual memory related information
| Process Physical Memory | Process Virtual Memory | Physical Memory | Virtual Memory |
| Process physical memory | process virtual memory | physical memory | Virtual Memory |
Tag memory usage
UE Allocator marks the allocated memory with special marks, such as TEXTUREGROUP_Lightmap, TEXTUREGROUP_UI, etc.
Number of UObject objects and memory statistics
The last line calculates the total memory of Objects
| Class | Count | NumKB | MaxKB | ResExcKB | ResExcDedSysKB | ResExcShrSysKB | ResExcUnkKB |
| Class of UObject | quantity | use Memory |
Maximum memory usage | Sum of other ResExc |
Number of bytes allocated in dedicated system memory | Number of bytes allocated in shared system memory | Number of bytes allocated in location memory |
| ResExcDedVid | ResExcShrVidKB |
| Number of bytes allocated in dedicated video memory (VRAM) | Number of bytes allocated in shared video memory (VRAM) |
RHI memory
RHI resource memory ( more specific than RHI memory )
The number of resource Object objects and memory statistics of SkeletalMesh
Number of resource Object objects and memory statistics of StaticMesh
Specific texture object memory usage (non-VirtualTexture)
Particle system takes up memory
.ini configuration files occupy memory
RT pool takes up memory
Specific texture object memory usage
StaticMeshCompoent occupies memory Object object statistics
Unreal Insights--Memory Insights
Documentation in: Memory Insights in Unreal Engine | Unreal Engine 5.2 Documentation (unrealengine.com)
Open Unreal Insights
UnrealInsights.exe is an independent Profile program, located in Engine\Binaries\Win64
If the UnrealInsights.exe executable program does not exist in the directory, it must be built in the project
Open display: Live represents running processes
Add execution command parameters to start Editor or project
Trace analysis
Click OpenTrace of UnrealInsight above to open the capture information
LLM Tags
You can list the object classes in the list that you want to view in the view on the left.
Investigation
Memory investigation system, you can use rules (greater than a certain time point, less than a certain time point, between certain two time points) to display the memory allocated but not released over a period of time. The following is a view from 10 seconds to 20s Memory changes (memory statistics allocated after 10s and not released by 20s
Here, click on the left side of each alloc name in Hierarchy to view the allocation program stack, memory size, source files, etc.:
After looking at it, I feel that the shortcoming is that there is a lack of information. For example, the Memort -full command can point out the specific name and map path of an object.
