Flew the default C-172 out of KSEE. Sitting on RWY 09L the FPS was 10 to 12 and CPU frame time was 40 to 50 ms.  I was using the Scattered cloud preset that comes with the sim.  Flew on runway heading for two minutes and FPS stayed the same as at start of flight.  All other hardware measures also remained the same. 

Went into the weather menu and changed to Clear Skies preset - no other changes.  FPS jumped up to 25 and frame time dropped to 23ms.  Went back to Scattered clouds preset and frame rate and frame time remained at 25 and 23.  Flew for 10-minutes with everything staying the same.

Landed on RWY 27R at KSEE with no problems.  Turned/taxied the plane around to takeoff on RWY 09L and frame rate dropped to 2 FPS and CPU frame time jumped up to 133 ms.  I changed weather presets, turned off dynamic, manually changed LODs to 100, changed cloud from High to Low.

NOTHING I did brought the FPS back above 2-3 FPS and CPU frame time stayed above 100ms.  The plane was unflyable - a change in throttle or rudder input was not demonstrated by the sim until after a several second delay.  

The network activity did not change and OOKLA kept reporting 850 - 900 Mbs.  

Why/How is performance so dramatically different over such a short period of time and in such a restricted area of flight?

I shut the sim down and restarted it at the identical location with all the same settings as the start of the prior session and immediately saww 25 FPS and 23 ms frame time.  NO changes but huge change in performance!

 

What's your setup/rig?

Mine in the sig with vsync off in sim settings and Riva Tunner fps limit set to 30 e rock solid / smooth under all circumstances, although I didn't monitor CPU.frame.time but will try to when possible. I assume you enabled dev mode for that?

Edited November 28, 20241 yr by jcomm

I've had the same thing happen multiple times, that is when I can get the Sim to load at all. I think there are still major issues with the online streaming. 

8 hours ago, jcomm said:

What's your setup/rig?

Check his signature.

Edited November 28, 20241 yr by Christopher Low

8 hours ago, TacomaSailor said:

Flew the default C-172 out of KSEE. Sitting on RWY 09L the FPS was 10 to 12 and CPU frame time was 40 to 50 ms.  I was using the Scattered cloud preset that comes with the sim.  Flew on runway heading for two minutes and FPS stayed the same as at start of flight.  All other hardware measures also remained the same. 

Went into the weather menu and changed to Clear Skies preset - no other changes.  FPS jumped up to 25 and frame time dropped to 23ms.  Went back to Scattered clouds preset and frame rate and frame time remained at 25 and 23.  Flew for 10-minutes with everything staying the same.

Landed on RWY 27R at KSEE with no problems.  Turned/taxied the plane around to takeoff on RWY 09L and frame rate dropped to 2 FPS and CPU frame time jumped up to 133 ms.  I changed weather presets, turned off dynamic, manually changed LODs to 100, changed cloud from High to Low.

NOTHING I did brought the FPS back above 2-3 FPS and CPU frame time stayed above 100ms.  The plane was unflyable - a change in throttle or rudder input was not demonstrated by the sim until after a several second delay.  

The network activity did not change and OOKLA kept reporting 850 - 900 Mbs.  

Why/How is performance so dramatically different over such a short period of time and in such a restricted area of flight?

I shut the sim down and restarted it at the identical location with all the same settings as the start of the prior session and immediately saww 25 FPS and 23 ms frame time.  NO changes but huge change in performance!

 

I had similar issues and they seem to be conncected to VRAM running out, leading to massive FPS drops/stuttering. You can check your FPS and what affects it ingame with the developer options/debug menu. If you play in 4K on an 8GB GPU, that simply won't be enough for certain higher graphics settings because VRAM will run out.

Try lowering texture resolution, LOD, cloud/trees/water settings or any combination of those, that mostly solved it for me.

21 minutes ago, Christopher Low said:

Check his signature.

OOps ! 🙂

13 hours ago, TacomaSailor said:

Flew the default C-172 out of KSEE. Sitting on RWY 09L the FPS was 10 to 12 and CPU frame time was 40 to 50 ms.  I was using the Scattered cloud preset that comes with the sim.  Flew on runway heading for two minutes and FPS stayed the same as at start of flight.  All other hardware measures also remained the same. 

Went into the weather menu and changed to Clear Skies preset - no other changes.  FPS jumped up to 25 and frame time dropped to 23ms.  Went back to Scattered clouds preset and frame rate and frame time remained at 25 and 23.  Flew for 10-minutes with everything staying the same.

Landed on RWY 27R at KSEE with no problems.  Turned/taxied the plane around to takeoff on RWY 09L and frame rate dropped to 2 FPS and CPU frame time jumped up to 133 ms.  I changed weather presets, turned off dynamic, manually changed LODs to 100, changed cloud from High to Low.

NOTHING I did brought the FPS back above 2-3 FPS and CPU frame time stayed above 100ms.  The plane was unflyable - a change in throttle or rudder input was not demonstrated by the sim until after a several second delay.  

The network activity did not change and OOKLA kept reporting 850 - 900 Mbs.  

Why/How is performance so dramatically different over such a short period of time and in such a restricted area of flight?

I shut the sim down and restarted it at the identical location with all the same settings as the start of the prior session and immediately saww 25 FPS and 23 ms frame time.  NO changes but huge change in performance!

 

I have only seen reports like this in Free Flight.  No one seems to be reporting these massive performance drops in career/missions.  Were you in Free Flight and can you try a couple of career missions to see if performance improves?  

I was in Free Flight.

My concern is not the low FPS because I know how to use all the options to reduce resource usage and improve FPS.

My concern is that the identical flight, settings, scenery, airplanes...everything leads to acceptable FPS at one moment and then the frame rate becomes so low the sim is unflyable.  For example, low FPS at takeoff, go into weather and change preset, return to flight and FPS is doubled.  Go back to first weather preset (low FPS at takeoff) and FPS remains high.

Using system informer to monitor resource usage I see no change in memory usage (processor or GPU), no change in page rate (not even in hard faults which are the only really problematic page faults), no change in cpu time per frame when switching from the low FPS to high FPS and back to low FPS.

Bottom line - I don't care about FPS by itself - but why does FPS change so dramatically with no changes in any settings?

I was getting 11fps earlier today at Heathrow, traffic on ultra. Now, I'm getting 40fps...

Same results in free flight and career. But most interestingly, my GPU (2080ti) was barely getting used at 11fps, whereas at 40 it's at 80-90%.

So I'm inclined to thing the issue is with MSFT and not with my local settings/rig

Guys.  My 2 cents.  I have been hating life with 2024 since it came out for many of the well known reasons but also because there are just too many quirks.  Setting up controls is a BEAR.  Not because of not knowing how to but because you set things up, close the sim, come back and check, and what you did is either gone or halfway what you had setup.  I've spent waaaay more time than I should have just setting up controls on this thing.  Then there's the issue of fluidity.  On one instance the sim is super stable and buttery smooth and on the next session is a slide show on the same place, with the same conditions.  Weather is another annoyance.  You setup your options to live weather and when you launch the flight you have to go back and re-select live weather - what???  And then there's live traffic with almost no repaints.  You get romanian airlines in Denver and russian airlines in Dallas - what?????  So frustrating.  This whole cloud gaming thing with MSFS is not cooked yet.  What were they thinking?

 

Edited November 28, 20241 yr by DMullert

16 minutes ago, DMullert said:

Guys.  My 2 cents.  I have been hating life with 2024 since it came out for many of the well known reasons but also because there are just too many quirks.  Setting up controls is a BEAR.  Not because of not knowing how to but because you set things up, close the sim, come back and check, and what you did is either gone or halfway what you had setup.  I've spent waaaay more time than I should have just setting up controls on this thing.  Then there's the issue of fluidity.  On one instance the sim is super stable and buttery smooth and on the next session is a slide show on the same place, with the same conditions.  Weather is another annoyance.  You setup your options to live weather and when you launch the flight you have to go back and re-select live weather - what???  And then there's live traffic with almost no repaints.  You get romanian airlines in Denver and russian airlines in Dallas - what?????  So frustrating.  This whole cloud gaming thing with MSFS is not cooked yet.  What were they thinking?

 

They were thinking in MONEY.

and we are MON k EY s

Just tried another experiment with consistency.  Same results - super fluid and responsive with 32 FPS (Dev Mode).  I had previously turned off dynamic and set the LODs very low to minimize cpu load.  I had most settings at medium or high.  Nice flight - things did not look too bad, considering I had greatly reduced my graphic settings.  Landed and parked and ended flight gracefully.

I then clicked on Restart Flight without leaving the sim

The default C-172 was again positioned on RWY 27R at KSEE.  All the settings remained the same as in previous very nice flight.  BUT - FPS was 2 to 4, CPU usage was nil, could barely fly plane because there was a multi-second lag between control input and requested control action.  Dev Mode FPS display showed my network usage to be almost zero.  Scenery was atrocious.  Grey boxes were moving around the airport where I would expect to see utility vehicles and other aircraft. 

SO - the act of ending a flight and then restarting the flight caused the sim to become unusable.

All that occurred over a period of less than five minutes.

I do run a system dedicated to flight sim - no anti-virus, no firewall, no other applications.  I am very careful to kill all processes not needed for the sim, sim support, or system monitoring.

This is just unacceptable!~