Hi there!
I have a new, pretty strange phenomenon going on (latest sim version, Win 11 and Nvidia drivers are up to date):
When I boot the sim and start a flight, I get super smooth FPS with no stutters at all. When I choose a different plane and start a new flight it becomes a stutter mess, with periodic frame drops. In the second screenshot, I started the sim feshly, began a flight with a different plane, and then switched to the same aircraft as in screenshot #1. As you can see, I now get periodic frame drops. Why is that?
I just tried deleting the rolling chache (8GB of size), but that didn´t solve the issue either…
No one else is having this issue? It happens with every aircraft, and everywhere. Just tested it with the PMDG 737. Fresh flight, buttery smooth, second flight the periodic stutters with CPU (main thread) peaks are back…
I mean, it’s not the end of the world to reboot the sim for every new flight, but I can’t remember having this issue before.
I have this issue too. Deleting the rolling cache didn’t solve for me either. Annoying stutters!
1 Like
I think the main cause for this is because (and I am not 100% sure if this is the case) but the simulator has already loaded a lot from your previous flight and with it loading new data, there’s a lot that the simulator has loaded. Not just scenery 
Just what I think, I may be wrong!
Cheers! 
1 Like
Makes perfectly sense!
But I’ve never encountered that issue yet!?
Plus, as you can see in my screenshots, the RAM and VRAM usage isn’t higher on the second flight. It’s rather caused by freuqently (around 2 times per second) occuring “limited by main thread” spikes (as marked in the screenies.
I have the same problem, mate. Not managed to find a solution, unfortunately. Only exiting and restarting the sim. As you’ve said. Which isn’t ideal. 
1 Like
I’ve been away from the sim for a while, and just installed the newest updates and stuff, and this phenomenon is still present…
Same Issue, after about 15 Planes the game stops reacting altogether. Even if its all the same type only different liveries
Hi, @KlausMann7677
When you say “the game stops reacting altogether”, do you mean it freezes & you have to end the game with Task Manager?
Next time you fly & change planes a lot, can you open Task Manager and keep track of the memory use (In use, Available, Committed, Cached) each time you start a flight with a new aircraft (just minimize Task Manager while flying). It would be interested to see if your memory usage continues to grow with each flight. Thanks!
Instead of delete rolling cache try expanding rolling cache
Also you can try to lower settings of terrain offscreen pre caching the oprion directly under the
Terrain LOD slider in general option, and see if this helps
Regards
Sebastiaan
The Game starts rubberbanding heavily and only occasionally reacts to mouse clicks (basically you have to time clicks to the rubbanding-rhythm).
RAM is at 50%, 16GB of 32GB available. Nowhere near close to running out.
RAM is unchanged throughout Plane changes. (about 700MB change, no more)
@KlausMann7677
OK, thanks for that info. Does this issue occur if you run the sim in safe mode?
I’m also having those same “rhythmic” mainthread spikes as shown in the 2nd screenshot by OP, and it usually happens as soon as I load up into an aircraft. It becomes especially apparent with aircraft like the ini a320neo, a300/310 etc. PC specs: 5800x3d and 2060 super all latest drivers. I run a mix of med/high settings.
OK, checked again and RAM indeed goes to 31.8GB at some point, after a couple of Plane Load ins.
I don’t even have to fly, just changing Aircraft in the Hangar or having an Update or Download in the Content Manager will cause stuttering.
So basically have to restart the Simulator for every single flight right now.
Hi @KlausMann7677,
Have you managed to run a test by starting in safe mode to see if this occurs without any addons?
- If the stuttering goes away, then we can start trying to identify the addon that is causing it.
- If the stuttering is still present in safe-mode, then we need to think again…
Rename community folder to community_copy. Create nerw community folder. Rename file exe.xml to exe.xml_copy. Default file location c:\Users\YourUserName\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\
Launch MSFS without addons. Try DX11 and DX12.
