After playing a few hours, FPS drops from 40 to 5FPS

[hobanagerik]

That’s really odd.

[sehnsedahamses]

There are a lot of threads now about this issue, maybe the mods can merge them.

For example

32gb of memory not enough!

Sometimes 32GB are really not enough. The RAM fills up more andd more until its full after an hour or so and the system start wild paging, game drop to 4-6 fps. With some luck you can quit to main menu but ram restores very very slow. [msfs RAM OVERFLOW] I am surprized to see that GPU-Z shows an RAM usage of up to 29GB while task manager only show up 8GB for msfs but there is not other ram consuming task. [msfs RAM OVERFLOW 2] Note that the VRAM is also maxed out. Happens today over fran…

FPS Drop during flight

It has been a while since I had MSFS perform so well, this update increased my fps a lot and I have managed to get over 55fps in Miami with everything on ultra. However, there seems to be a memory leak of some sort affecting the game. Yesterday I was on stream flying from Copenhaguen to Moscow. When I took off I was sitting around 45-50fps, but when I reached Moscow I had 5-8fps, I barely managed to land in what felt like a power point presentation. The issue did not stop when on the ground, s…

Memory leak on increased sim rate/slew mode

I’ve noticed a memory leak in the latest release that degrades my game play from about 30 frames per second to about 1 to 2 frames per second (at the end of a 4 hour flight). Plane: Daher TBM 930 Route: Tour of large cities of Middle East (Karachi, Islamabad, Kabul, Dushanbe, Tashkent) Settings: High Quality, 4k resolution, Live traffic, AI co-pilot on the radio, not developer mode Mods: None System: Intel i7, Asus 1080 Ti, 32 MB RAM With each city I check my 32 MB RAM usage. It starts the…

Memory leak randomly happening

Can you please please pelase fix this annoying memory leak that is randomly happening with this sim. It randomly leaks memory and uses up all ram on your system. It is only this sim that does this and has happeend since the japan update.

Sure looks like a Memory leak

I guess this is just one more to add to the list of all the previously reported “Memory leaks”, but this one is easily demonstrated, so here goes. It became very obvious on my current Trans Atlantic flight in the C172 at Mach 2.5 Hold on … bear with me !!! (got your interest though – Mach 2,5 in a C(oncord) 172 Set the sim to x16 and flew the C172 from USA to UK. Monitoring the memory use, now in x16 time, one could clearly see the memory use increasing, the CPU threa…

Is there a memory leak?

There is no real kind way of putting this but after a while of playing it seems like MSFS2020 sh*ts the bed. I was rolling along getting a reasonable frame rate. Had some bad luck with a particular flight into London in a storm, the game crashed, so I restarted, set up the same flight again then I crashed (ATC had left me at 22k almost until final but having got almost this far in the previous attempt when it pulled a CTD I felt I might pull it off with a little aerobatics…I didn’t) Third attem…

Extreme framerate decrease (memory leak ?)

Hi All, I have a high end PC with a RTX 3080 and all runs very smooth. But sometimes on major airports the FPS are decreasing the longer you are at he airport. Example: At EDDF the FPS are 35. During taxi to the gate it’s decreasing to 5 FPS. When saving the flight at that position and load the flight from that exact position it’s back to 35 FPS !!! I also saw this behaviour at PARIS CDG T1. Anyone seeing this before ?

to list a few.

It will become eventually more expedient.

Thank you

[N6722C]

I suspect the probelm is just the same as it was in FSX - after all, MSFS 2020 is based on FSX.

After some time of allocationg memory, using it, and then releasing it, memory becomes so fragmented, that there is no longer available in required contiguous block to meet allocation requests, and then the request has to be serviced by the Hard Drive.

Its not so much a question of not having enough TOTAL memory, its that none of that memory is now suitable for its required use.

OR

Its something else – who knows – Clearly NOT Asobo (or me !!)

[zephyr020590]

There is definitely something going on with the game when it comes to long flights. Constantly getting low FPS usually on descent phase. My guess is that after a certain amount of time the game utilizes the CPU instead of the GPU for rendering.

As you can see on outside view normally the game utilizes the GPU more than the CPU but at this point the GPU just remains on IDLE as seen on hwinfo. I have tried everything changing settings, disable game mode, gpu scheduling, latest drivers, increasing paging file etc. None works except restarting the game. And no my pc is not Overheating and is far from thermal throttling and is well above system requirements.

Maximus XI Code Motherboard
i9 9900k OC to 5.1Ghz
RTX 3090 FE
64Gb Trident Z 3600mhz
Western Digital Black 1tb nvme (FS install drive, nothing else)
1300w Seasonic Prime Gold PSU
NZXT x73 AIO
9x Thermaltake Riing Plus 12 Fans

Cant even land with this FPS.

[DavidRdz82]

Issue still there, anyone have a workarround when this happens. Only way is to restart the sim by now? Using rtx3080 with avg of 45-60 fps and suddenly drops to 10 fps and cpu usage from 80% to 30% or less

[AlexxBig]

I have the same problem here too…after 1 hour FPS starts dropping til i can´t fly or land…
I’ll try to disable photogrammetry and enable it back to see what happens.
And also i´ll try to install a free memory program.

[Advina]

Just chiming in to add that I am having the same problem. About 90 minutes into a flight today, FPS went from 55 to 15 to 2. Task manager showed CPU usage at about 15% and GPU usage at less than 5%. I tried dropping the settings all the way down to low with no improvement. I saved my flight, dropped out to the main menu, loaded back into the flight, and was able to continue with about 35 FPS. Didn’t feel like doing a whole restart. I’m running a 10900K and 3080 TI. Temps are fine.

Maybe the July patch will take care of this…

[SvenZ]

I’m getting the runaway ram usage problem again since I switched to Bush flights. I started with the Pyrenees and Alps. It went fine at the start but in leg 7 it just got slower and slower.

I landed at sub 5 fps, 39GB committed, 21GB working set

While exploring NY at low altitude committed was no more than 21GB, I haven’t seen the working set get that high since stress testing London after the UK update. (with double the terrain detail settings I’m using now)

Return to menu only freed up 4GB, still 35GB committed. Returning the menu and quitting the sim took several minutes. Ram use just steadily kept on going up during the flight.

After restarting the game, continuing the bush flight right from where the screenshot is, 16GB committed, 11GB working set, normal for my settings (high, terrain detail 100)

[A7799799]

I also encountered the same problem after this update, I flew again yesterday
Use TBM930 to go from VHHH to RCKH. At the beginning, the FPS was about 45. After 40 minutes, the FPS dropped to 10 or lower.

There were no such problems before the update
Equipment R5 3600
RTX 2060 6G
32G RAM

[BowedGuitar1430]

Did SU5 solve the issue for you guys?

[SvenZ]

I have not had any runaway memory problems since SU5, but I did have performance issues after a couple flights in a row with crackling audio and increased stuttering. Restarting the sim made it all smooth again.

[Latrina3666]

Unfortunately not. It worse.

[CrabbyRobin33]

How about deleting the Rolling Cache and creating a new one?

[lastpilot1]

@SvenZ

I have not had any runaway memory problems since SU5, but I did have performance issues after a couple flights in a row with crackling audio and increased stuttering. Restarting the sim made it all smooth again.

I’m on Xbox and just wanted to say that I have the very same problem. After around 1.5 hrs the fps decreases rapidly and the crackling audio intensifies. When it comes to the actual landing I have the “power point presentation” already mentioned by many users. Changing the photogrammetry setting or deleting the rolling cache doesn’t help. Only after a restart of the sim everything is back to normal, but again only for about 1 hour or so…
I’m sure Asobo is aware of this issue and they will fix it eventually. Fingers crossed

[Vincat84]

I am facing the exactly same issue guys! the FPS are so unstable in this release. In the same aiport, same conditions, same settings, same hour, etc I have sometimes 25 to 30fps or… 45-50…
I am saying this without moving the camera… maybe you press the restart button and you’ve got a fps increase… This is weird…
I have been playing a lot with the usercfg parameters and I can state I did’t find any root cause of this… even when I change everything to low the sim cannot increase the fps as well…

I did also a fresh install and still have the same issue…
Everything at default without addons…

[mdionizio]

Facing the same issue. Cannot complete a long-haul flight (7 hrs +) without some serious FPS degradation. Start with 80-100, end up with 20 FPS.

My specs:
RTX 3080
i9-9900
32Gb RAM

[kawafahrer]

I have the same problem. After 3h45min i had 19 fps at35000ft. after take off 69fps in 39000ft

[Unic0m]

Same issue this evening. Did a flight from KSDF to OMDB. I noticed over the ocean I was getting fps spikes with dips down into the low 30s and they would shoot back up to the 50s randomly. By the time I was approaching Dubai, it became more frequent. By the time I was over the city of Dubia, my fps dropped to 13fps!!! It remained that way until about 2500’ and finally shot back up to 45+fps. The city itself seemed slow to load in and really didn’t pop in until final approach. You could see tiles that were blurry in the area like it was struggling to load… I’ve seen this same behavior with p3d after a 12+ hr flight as well. Lastly, by the time I pulled up to the gate my fps were back in the 60s.

Just over Dubai with obvious texture loading issues - 14FPS!!!

On the ground and FPS have returned to normal

Floating around the city with FPS in the 80s now

[SvenZ]

I see you have high times in manipulators, could this bug be back?

Intermittent Performance Spikes, high time in Manipulators

I’m seeing random performance spikes, where FPS will drop from 50 to around 10. Manipulators and MainThread will show 80+ms. This will continue for around 10-30 seconds, then FPS suddenly improves. This isn’t always back to full speed, there seems to be an intermediate state (for me it was 25-30 FPS). It will sometimes jump between the 3 states a few times (10-30 seconds each) until finally getting back to normal speed. The switch between these states is sudden and obvious, both in the…

It was the infamous 76T airport that had it the worst. The theory tehn was that it had something to do with air spaces, where they intersect.

It could also be something new. That bug was entirely location specific with hard on/off behavior.

[hobanagerik]

Yes, I remember testing it out. It only occurred at certain locations, typically NW, and SW at the very perhipery of an airspace, typically in a triangle shape. You would get <1FPS when you entered that region.