we just upgraded to 4.9 and we immediately encountered a big issue with memory usage. Just by leaving the blueprint editor open, Unreal keeps allocating memory until the system memory is exhausted. Our team PCs all have 24Gb of RAM, which have been more than enough to work for hours with Unreal 4.7 and 4.8 over several months, but now it takes only a few minutes of work to reach the point where the system becomes unresponsive.
I am attaching two screenshots showing the memory usage pattern: in the first, Unreal is launched and the project is loaded. About 2.8Gb of memory is allocated and then a plateau is reached. On the second screenshot (attention: the scale is different), I just opened the blueprint editor for one of our most complex blueprint and just waited. As you can see, the memory usage started increasing linearly and didn’t seem to come to a stop. It took only a couple of minutes to get to 13.4GB when I made the screenshot, but the increase did not stop even afterwards.
Is anyone experiencing a similar issue?