Question Is it...normal for Unity to use an increasing amount of memory as long as I leave it open?

I'll post this on Unity 3D's subreddit, too.

So, I notice that my Unity seems to be eating my memory up. I don't really know what else to say, besides the fact that it needs more and more memory (AND CAUSES MORE LAG) the more I use it. This doesn't happen on my old laptop, but does on my new one and my Gaming PC.

I think its an AMD issue, since both my new laptop and gaming PC have AMD CPUs.

The Laptop has an AMD A4-5000 APU with Radeon HD graphics, and the PC has an AMD Athlon II X4 630 processor. The old laptop has an Intel Celeron CPU

Don't know if that matters, but I might as well list it.

Lastly, I noticed that the memory issue happens when I'm moving around a scene. I'm testing it in a completely empty scene, and when I move the editor, more memory is taken up and I lag more as a result. And that this is happening in Unity 2019.3.7f1. HOWEVER, The same thing happened when I installed Unity 2019.3.15f1 the other LTS versions of unity (All of them. I've tried them all). Eventually, this will lead to Unity crashing, so there's no point to fight through it.

Again, this doesn't happen on my old and objectively weaker laptop. Only the ones with AMD CPUs.

This is killing me; I'm trying to make a mobile Shock style game, and I KNOW i'd be done the demo by now, singlehandedly, if this lag wasn't a thing.

TL;DR: I've ran Unity on three computers. The memory eating issue seems to occur on my pc and laptop with AMD CPUs. In 2019.3.7f1, 2019.3.15f1 and all the LTS versions (seriously). It happens until Unity crashes.

 

Generally not. I'd recommend submitting a bug report with this project. It's possible you've found a memory leak.

However, I'd start by profiling things first. Open the profiler, choose Profile Editor, and make sure that Memory is being included in the profiling. Then see if the memory usage climbs. You should be able to see what's contributing to the memory usage. That might more strongly indicate a leak in Unity's code, or possibly a problem in your own code.

 

I don't think the issue is my code since I don't have this issue on my older laptop. Plus, I opened a completely blank Unity project, and I'm having the same issue with it. I did run the profiler, though, but I don't know where to upload the data file I just saved.

 

I'd definitely try to submit a bug report if this is happening on an empty project. Have you identified whether it's one particular system that keeps growing?

If you click somewhere in the Memory graph. you can click "Take Sample Editor" to capture the size of various objects:



I'd be curious, if you did this twice a few minutes apart, if you see one item grow significantly in size between captures. You can then submit a bug report including the data. Note, though, that these profiler sessions can be huge, so it might be tricky to upload it with your bug report. I'm not sure, in that case, if it's better to put the file on some public server (dropbox, Google Drive) and just send the link with your bug report.