How to increase the memory heap size on IntelliJ IDEA?

Question

I want to allocate around 1GB of heap size, but I can\'t seem to figure it out.

How to do this?

Answer 1

If you use JetBrains Toolbox, then memory changes must be set inside it:

1. Go to the app settings in the toolbox list
2. Change Memory heap size option within Configuration section

Otherwise all the changes in the IDE itself or inside vmoptions file just don't apply.