Terrain map causes memory heap. How can i fix it?

Hello,

I am currently working on a WebGL project. The project file size is around 70-75 MB. Around 10-15 MB is obtained by the Unity's terrain map that I used with my project. The terrain map is 4000x4000. You can see the terrain settings in the picture attached. Each time I restart the screen, the memory usage increases, and after 3 or 4 screen restart, I get out of memory error. What kind of terrain settings should I use to prevent memory error?

By the way, when I delete terrain from the screen and when I build my game, I never get a memory error. I finally found that the memory error is caused by terrain. It is not kind of possible for me to delete the terrain from the game because it is needed inside the game

Thanks in advance.

 

Thanks for your reply jukka_j! I attached the error as a screenshot.

Edit: Do you want me to post the screenshot of console log in here? I don't know how to do it, but I can search for it and prepare it for you.

Second edit:
I found which part of the code causes memory heap. I am not sure but the profiler says that when the scene is loaded this code piece uses memory too much

Code (CSharp):

1.  
2. void GetTerrainData(){
3.  
4.         if (!Terrain.activeTerrain)
5.             return;
6.        
7.         mTerrainData = Terrain.activeTerrain.terrainData;
8.         alphamapWidth = mTerrainData.alphamapWidth;
9.         alphamapHeight = mTerrainData.alphamapHeight;
10.  
11.         mSplatmapData = mTerrainData.GetAlphamaps(0, 0, alphamapWidth, alphamapHeight);
12.         mNumTextures = mSplatmapData.Length / (alphamapWidth * alphamapHeight);
13.  
14.     }
15.  

 

The thing that increases my memory usage was GetTerrainData() code which I share above. Each time I reload the screen, the code is called and this increases the memory. I deactivated it for now and now I going to create a copy of it and I will try my game to read that copy on each reload.

Thank you so much for your interest!