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

[Optimus9111]

Issue comes from the game, no fix will solve it.

[unbeneva]

I just had 5 roughly half hour flights in a row (with short breaks in between - leaving the sim on at the menu). Flying in VR with my Quest 2. During the last flight, FPS started to drop and then it froze then CTD.

The only other time I’ve had CTD’s are when I’ve left the sim running at the menu for a long time (hours).

I wonder if it is leaking memory?

[hobanagerik]

@BubbaBlitz7348

I and others think more and more its a server/cloud issue and nothing you can do a single thing about.

So flying with all online features disabled should “fix” this issue in that case.

If anyone can replicate this fault 100% of the time, disabling all online features should reveal whether this is a client or server issue.

[VBHBAU]

Tried to do a 5.5 hr flight in the Fenix and hit around 4 hours and it’s happened to me again. Did the NDU fix, turned off Photogammetry and deleted rolling cache nothing worked. Only have liveries in my community folder. Shelving the game till SU10 and beyond until they fixed this because mid to long haul is what I like to do.

[Razalom]

Until 3 days ago never had any issues. Now after roughly an hour of flying FPS in both VR and via the Monitor tanks to 10 FPS max. Go back to the main menu and back in to a plane and the FPS is back. So frustrating as nothing new was installed prior to the issue.

[BubbaBlitz7348]

@hobanagerik

@BubbaBlitz7348

I and others think more and more its a server/cloud issue and nothing you can do a single thing about.

So flying with all online features disabled should “fix” this issue in that case.

If anyone can replicate this fault 100% of the time, disabling all online features should reveal whether this is a client or server issue.

But heres the thing, its not an everytime event. One time it will run fine and then the next time its appears. Fortunately yesterday it did it all day long…

[hobanagerik]

That’s why I asked if anyone who can or rather does get this all the time could test. There is no point anyone who gets it intermittently testing it.

I could look back through the posters in this thread, but I’m pretty sure I will find some who state that they get this for every flight. They would be people to test this theory. If they get it with all online features disabled, then its unlikely to be a server issue.

Which would then beg the question why don’t more users see this? I have never seen it, for example.

@DavidRdz82

For me the issue continues, every flight longer than 8 or more hours ends in 10 fps issues

@Kaichu3617

It happens mostly at the same time on every flight (two hours on the A320nx) and progressively gets worse the longer you fly

@BafflingBerry63

i am seeing fps dropped to 10fps consistently every flight after 1 hour today

@faketristan14

It happens almost every flight. I hope Asobo is going to fix this issue

@UnheardAmoeba55

This happens on every flight. FPS and performance degradation.

I’m sure if I look for other terms I will find more. But these users would be the ones to test whether disabling all online features fixes the issue or not, and would go a long way to proving whether this is a client or server side fault.

[gvert]

And yet again. Same as yesterday, return from Greece to Düsseldorf, and after 5-5.5 hours above Serbia again, FPS dropped and latency stepped through the roof. The sim then eventually crashed shortly before reaching GRZ VOR, in Austria.

Tried the “NDU trick” on this one, to confirm that it’s useless for me.

[bawls2heavy]

Okay people. I had it and now no longer have it. Flew on fenix for 4 hours, no drops, went to main menu and spawn into another 1.5 hr flight, again no drops. Before it was within 2 hours I’d get it.

These are what I did this time which are new:

1. used DDU in safe mode to uninstall the driver cleanly;
2. used NVcleanstall and installed a bare minimal version of the latest driver;
3. uninstalled gsn450 mod, don’t have yourcontrols or toolbarpushback, but I have FSCIUP and Simconnect.
4. did one of the optimised nvidia control panel suggestion from a YouTuber (optimal power, ultra low latency mode, etc);
5. spawned in a random flight and resetted the toolbar setting, respawned and then switched off the tools I don’t need;
6. went to settings and switched off online ai traffic and multiplayer;
7. quit game.

Then for each flight I now spawn at airport (I flew fenix) and then used devmode> Tool> aircraft selector and reload the same plane before flying. (For fenix it will not respawn into cold and dark so you have to set it on EFB again).

I don’t know which part of this did it for me but it did. I run GTX1070, 12700F, 32GB DDR5, Gen4M.2, win11, Steam ver.

[BubbaBlitz7348]

So trying to play the lotto this morning 5:45am … benchmark flight … cold and dark … fps 20 … start engine … make turn to taxi to runway … 12 fps … proceed to runway … launch … 15 fps … cruise 20 mi ( before I couldnt stand anymore ) fluctuating between 11-15 fps. TURN OFF ALL ONLINE FUNCTIONALITY .. looks real bad … fps 30. Turn on bing and pg and live weather bam back to 12 fps…

rinse and repeat 3 times

now its 7:10 eastern. Launch the sim … benchmark flight … cold and dark … start engine 20 fps .. taxi to runway it drops to 16 fps and then quickly jumps to 20 nice and smooth all the way to Erie…

So I guess the odds of winning the lottery today are 1 and 4. Bwhahahahaha

Just attempted another flight fresh boot and now we’re back to the 12-14 FPS again …

[UnheardAmoeba55]

When I start to get degraded performance, if I switch to developer mode, my FPS seems to go back up. I can then turn off developer mode and things remain smooth for a while.

hobanagerik, I will take part in your empirical study at some point in the not-too-distant future.

[Steven748i]

Yesterday was a first time FPS drop for me in over 250-sim hours since February 2021. I will say I did install the newest version of the FBW A320. Will come back and see if it happens again in other aircraft or in the FBW. Really hope I don’t see a recurrence. Never had an FPS issue until yesterday, have even done 4-6 hours FBW A320 flights before.

[MentalMiggy]

I know every situation is different, but someone in my group said that for them, this was caused by the VFR map (possibly a memory leak). When they turned the VFR map off in toolbar toggle, the fps instantly went back up again

[Tweak112]

I don’t know why I still keep trying and telling myself it may be different this time even though the result stays the same. No matter which plane, which settings, which location or durance of flight. I always have massive FPS loss on arrival.

Arrival at EDDK - Stuttery 27FPS

Reload at the same location with the same settings. - Smooth 37 FPS

Mainthread +7 ms, Manipulators +6 ms and CoherentGTUIThread +7 ms.

[Jal61714]

Can you try turning live traffic off?

[Tweak112]

Everything off except satellite and live weather. I fiddled with all the settings already and it doesn’t change.

[SplitCurve49315]

Have y’all tried disabling HPET in windows via cmd or task manager? It worked for me on long flights.

Massive FPS drop because of SU9

Windows High Precision Event Timer. There are boatloads of articles and videos that suggest many (but certainly not all) people have seen fps increases and studdering decreases when you turn off this windows feature using either Device Manager or a command line code. Google it and you will see the articles explaining what it is and also the various results. It’s not a foolproof thing and like many of these tweaks it may or may not help your particular use case. I just wish Asobo would say…

Edit: I meant to say Device manager… NOT task manager…

[tempestornado23]

I did it in the Device Manager along with the NDU registry hack….I do see fewer studders and my fps is decent with no drops over time. It’s still not the same performance as I was getting pre SU9 and I can’t run the same terrain or object lod (now at 125, was at 200) and I can’t run the same AI traffic either (now at 15 down from 50). So, the HPET and NdU hacks may have helped some but the root cause of the reduced performance in SU9 has not been addressed clearly yet by Asobo and these hacks are workarounds that may lower the cpu load a bit for some modest help but are not fixing the core problem.

[diehummel]

This bug is getting odd. Cannot finish the LFBD-KSEA flight. After around 6 hours it stutters and always crashes.
No Matter which Plane, Safe or Normal Mode.

[Slaitmeister]

I admittedly haven’t read all 2800 replies to this topic, but wanted to say that I just had this happen over the weekend myself. I went from a solid 30 fps to 4. I ended up closing the AIG traffic controller and it shot right back up to 30. Anyone else try that?