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FPS drops after a long flight

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    FPS drops after a long flight

    Hello
    anyone facing sudden fps drop to almost stutter after a long flight on the 737 MSFS?
    always monitoring temps and they dont go above 60
    the only thing that solves the low fps is going to low graphics settings, altho when I start the flight
    i would be at Ultra settings with no issues

    Pc specs
    i9-12th generation
    RTX3080TI
    32GB RAM
    liquid cooled CPU

    Joe Karout

    #2
    It's not something that's specific to the 737, it seems to be a sim issue for some people. It's very hard to reproduce from what I understood (due to the millions of possible combinations of hardware, drivers, firmware, software etc). If anything, the 737 seems to perform better than most planes for those that have this issue on longer flights.
    Mart Jansen

    Comment


      #3
      It's hit or miss for me. I've had it happen with other planes, but I had framerate drop happen for the first time with my 737 on a 5 hour flight late last night, before finally crashing to desktop on short final. Frustrating, but I suspect it's more sim related thank anything. Just my guess.
      Andrew McHalpine

      Comment


        #4
        I just had that as well today. First long flight after SU9 released. Up to SU9 I was able to do 8+ hour flights with no issue with the BBJ. Today from 5:20 hours approximately I started hearing the sounds messing up and FPS went down. I got some data and will ask the team to sent it to Asobo to check. Never had any issues post SU9 so I suspect there might be something there.
        Chris Makris (Olympic260)
        PMDG Technical Support
        http://www.pmdg.com

        Comment


          #5
          Originally posted by cmakris View Post
          I just had that as well today. First long flight after SU9 released. Up to SU9 I was able to do 8+ hour flights with no issue with the BBJ. Today from 5:20 hours approximately I started hearing the sounds messing up and FPS went down. I got some data and will ask the team to sent it to Asobo to check. Never had any issues post SU9 so I suspect there might be something there.
          Normally if you save the flight then restart the sim, the FPS should go back to normal.

          I will try to check it when I have time, with the salty 747, during a long flight
          Benjamin MATHON
          Abidjan, Ivory Coast

          Comment


            #6
            I have had this since the sim came out. It happens anywhere between 2 and 7 hours into the flight. When it happens I save the flight and restart the sim but it's still annoying.

            Also happens with the FBW Airbus.

            Kind Regards,
            Ian McNillan

            Comment


            • YankeeTendy35
              YankeeTendy35 commented
              Editing a comment
              I've had it happen with the A339 mod and the stock 747, and the HD787, but I've never had any issue with frame drop or ctd with the 737 until after the update yesterday.

            #7
            I was having the same issue, then i found this is a known bug of Toolbar Pushback Mod, I removed it from my community folder and the FPS degradation during the flight was solved!

            -Lucas Cardoso

            Comment


            • YankeeTendy35
              YankeeTendy35 commented
              Editing a comment
              Unfortunately for me it happened after removing it

            • shamrock
              shamrock commented
              Editing a comment
              I will try removing that and see how it works. Since PMDG included a custom pushback option with the 737, I don't see why I need the TP mod.

            • CaptainEvillian
              CaptainEvillian commented
              Editing a comment
              shamrock the toolbar pushback has a pre planning feature. You can draw exactly how you want to be pushed. With the PMDG pushback option you have to guess the pushback distance or control the truck yourself.

            #8
            I've been fine performance wise since launch until today, first 2 flights were normal. my current flight, my frames have dropped and the aircraft is just banking side to side, I removed pb toolbar (unless it's still lurking somewhere else on my drives) so it can't be that.
            Joe Colehouse

            Comment


              #9
              I had a flight of about six hours without these issues because I locked the framerate at 30fps, not sure if this will help you guys
              Michael Dong
              ​​

              Comment


              • Hugues Boutaud
                Hugues Boutaud commented
                Editing a comment
                Totally agree.
                I don't see the point of running msfs without v/sync or framerate lock...
                I run a 12700k/RTX3080 with vsync 1/3 of 120 = 40 fps and the game is ultra smooth everywhere. Never any stuttering or fps decreasing...

              #10
              I think I've found my issue for performance deg, it seems to happen after losing connection to the online services of MSFS, before I lose connection all is ok, I lose connection, reconnect and that's where performances starts to deg
              Joe Colehouse

              Comment


                #11
                I've had this issue with all the other "big jets" as well. The Salty 747 had it happen the worst to me, but I was also flying EGLL -> KPIT. This has been ongoing since before sim update 9 for me though. PMDG seems fine. I'm currently at FL390 an hour into the sim and have 58 FPS.
                Jonathan Johnson

                Comment


                  #12
                  Originally posted by cmakris View Post
                  I just had that as well today. First long flight after SU9 released. Up to SU9 I was able to do 8+ hour flights with no issue with the BBJ. Today from 5:20 hours approximately I started hearing the sounds messing up and FPS went down. I got some data and will ask the team to sent it to Asobo to check. Never had any issues post SU9 so I suspect there might be something there.

                  yes please , send it to adobo because that is a very annoying bug……after a while sound start to mess up and fps go down , I tried a 12 hour flight and it was impossible to finish it cause every 10 mins the fps were going down so slow that at the final of the flight it was impossible to fly…… thanks for sending this to asobo


                  Miguel de Gonzalo
                  Miguel de Gonzalo

                  Comment


                    #13
                    Originally posted by Mike.cbr View Post


                    yes please , send it to adobo because that is a very annoying bug……after a while sound start to mess up and fps go down , I tried a 12 hour flight and it was impossible to finish it cause every 10 mins the fps were going down so slow that at the final of the flight it was impossible to fly…… thanks for sending this to asobo


                    Miguel de Gonzalo
                    I would suggest open a ticket to them as well.
                    Chris Makris (Olympic260)
                    PMDG Technical Support
                    http://www.pmdg.com

                    Comment


                      #14
                      Originally posted by JoeKarout View Post
                      Hello
                      anyone facing sudden fps drop to almost stutter after a long flight on the 737 MSFS?
                      always monitoring temps and they dont go above 60
                      the only thing that solves the low fps is going to low graphics settings, altho when I start the flight
                      i would be at Ultra settings with no issues

                      Pc specs
                      i9-12th generation
                      RTX3080TI
                      32GB RAM
                      liquid cooled CPU
                      I've done more than 10 flights. One flight, however, had that problem. It was a short PDX-SEA fight, and during taxi-in to SEA things came to a screeching halt FPS wise. Would love to know what caused that.
                      Luis Linares
                      i9-6700K, GTX 2080Ti, 64GB DDR4

                      Comment


                        #15
                        Hello everyone,

                        I have the same issue, 5+ hours flights, frame rate drop...I think it is MSFS related...not PMDG. And not consistently...

                        The behavior is 3 seconds of fluid frames, followed by a second or two of freezes...

                        Kind regards,
                        Fabio van Roon

                        Comment


                          #16
                          I know what is causing this , it is called memory leak as far as I know ….. to mitigate this problem by a cost of reducing visual is being limited always by gpu so the cpu does not bottleneck the computer and it does not keep accumulate the cpu for a long flights , in my opinion this is a lot notice on long flight specially cause the cpu keeps loading all the LOD on the cache as it’s bottlenecking to resolve this we have to low a lot the LOD from terrain in msfs I have an amd 9 5950x and I have the LOD to 135
                          hope this helps

                          Miguel de gonzalo
                          Miguel de Gonzalo

                          Comment


                            #17
                            We should vote this tread and make some noise about fps degradation over time….. please vote….. already more than 100 votes…… this concerns all of us.

                            https://forums.flightsimulator.com/t...date-10/517141

                            Thanks
                            Miguel de Gonzalo

                            Comment


                              #18
                              Here is a topic where you can vote , it’s about what we have talked in this topic , fps degradation over time already 169 votes…..please vote it , thanks.

                              https://forums.flightsimulator.com/t...date-10/517141
                              Miguel de Gonzalo

                              Comment


                                #19
                                Personally I traced this issue to the weather injection on my system.
                                I was getting FPS dropping down to as little as 2 FPS, and the sound all messed up usually around 4 - 5HRS in the 737.
                                Since turning Asobo's weather off and using REX Weather Force 2020 instead, I have not had a single problem in even longer flights.
                                While I do not expect this to fix it for everyone while we all wait for Asobo to address it, it did work for me and might for others.
                                Hope that helps someone.
                                Steve Mel

                                Comment


                                  #20
                                  Hi guys,

                                  This tweak found on MSFS forum did help me.

                                  So I hope it will help you aswell !

                                  https://forums.flightsimulator.com/t...prouved/504551
                                  Last edited by Hugues Boutaud; 27May2022, 12:39.
                                  Hugues Boutaud

                                  Comment


                                    #21
                                    Originally posted by Hugues Boutaud View Post
                                    Hi guys,

                                    This tweak found on MSFS forum did help me.

                                    So I hope it will help you aswell !

                                    https://forums.flightsimulator.com/t...prouved/504551
                                    I tried Avery thing lol also that….. not working , after 9 hours flight specially over ground , not in the ocean still happening…..

                                    Miguel de gonzalo
                                    Miguel de Gonzalo

                                    Comment


                                      #22
                                      Gents,

                                      Just to add some quick input here:

                                      We have been running some testing on the sim platform using comparative analysis tools to try and disprove to ourselves that any of this perceived memory usage is related to PMDG.

                                      We are about 75% of the way through the testing process and are nearly certain that the problem is indeed the platform post SU9- but we want to finish the work before we declare that with certainty.

                                      We will, of course, pass our results back to Asobo through our own direct channels when done- in hopes that it helps them to find/fix the issue on their side.

                                      Stay tuned. We will let you know what our results show.

                                      Robert S. Randazzo
                                      PMDG Simulations
                                      http://www.pmdg.com


                                      Comment


                                        #23
                                        Hi, this is a common problem. You can overcome this by switching off live weather on long-hauls.

                                        Comment


                                        • rsrandazzo
                                          rsrandazzo commented
                                          Editing a comment
                                          Nameless- Please do sign your posts here, we require it. Also: Your experience may be quite different than others in the thread. (In this case- i believe it is...) - RSR

                                        • AA752
                                          AA752 commented
                                          Editing a comment
                                          Does this affect fuel planning (e.g. removing an expected tail wind), or will MSFS keep the weather that existed after turning off live weather? This is something I have not tried yet to solve my issues. My plan tonight is to start a long flight with live weather on, turn it off at cruise, and then come back 5 hours later to check on it.

                                          -Zach Barrington

                                        #24
                                        Originally posted by rsrandazzo View Post
                                        Gents,

                                        Just to add some quick input here:

                                        We have been running some testing on the sim platform using comparative analysis tools to try and disprove to ourselves that any of this perceived memory usage is related to PMDG.

                                        We are about 75% of the way through the testing process and are nearly certain that the problem is indeed the platform post SU9- but we want to finish the work before we declare that with certainty.

                                        We will, of course, pass our results back to Asobo through our own direct channels when done- in hopes that it helps them to find/fix the issue on their side.

                                        Stay tuned. We will let you know what our results show.
                                        Thank you so much , we really needs this fixed….. it’s been my 5th flight from madrid to L.A this week with the bbj and it is imposible to land it….. I started at 55 fps and ended with 6 fps so I had to finish my flight….. no more long flights….. thanks for testing it and for send this useful information to asobo…..

                                        Miguel De Gonzalo
                                        Miguel de Gonzalo

                                        Comment


                                          #25

                                          if you use the program your control, then delete it. experienced the same problem. now everything is fine.
                                          Igor Krutskikh / Fly Arbuz
                                          BOEING 737 MSFS 2020. EXPECTATION AND REALITY!

                                          Comment


                                            #26
                                            Originally posted by iArbuzny View Post
                                            if you use the program your control, then delete it. experienced the same problem. now everything is fine.
                                            Specify a bit more , what program ? Windows ? Msfs ?
                                            thanks

                                            Miguel de gonzalo
                                            Miguel de Gonzalo

                                            Comment


                                            • mmoccio
                                              mmoccio commented
                                              Editing a comment
                                              There is an Add On called Your Controls that adds the ability to do shared cockpit with compatible aircraft. Regardless of if it is running or not, if its in your Community Folder it has been reported to cause issues.

                                            #27
                                            Originally posted by rsrandazzo View Post
                                            Gents,
                                            Just to add some quick input here:

                                            We have been running some testing on the sim platform using comparative analysis tools to try and disprove to ourselves that any of this perceived memory usage is related to PMDG.

                                            We are about 75% of the way through the testing process and are nearly certain that the problem is indeed the platform post SU9- but we want to finish the work before we declare that with certainty.

                                            We will, of course, pass our results back to Asobo through our own direct channels when done- in hopes that it helps them to find/fix the issue on their side.

                                            Stay tuned. We will let you know what our results show.
                                            Any news here ?
                                            thanks

                                            Miguel de Gonzalo
                                            Miguel de Gonzalo

                                            Comment


                                              #28
                                              This is over at the MSFS forums.

                                              Apparently the FPS drop after 4-5 hours has been going on since 4/21.

                                              In the 2700+ post there are all kinds of theories of what is causing the problem but nothing definitive. Maybe PMDG's testing will point the MSFS folks in the right direction.

                                              https://forums.flightsimulator.com/t...to-5fps/389603

                                              Comment


                                                #29
                                                Originally posted by rsrandazzo View Post
                                                Gents,

                                                ....

                                                We are about 75% of the way through the testing process and are nearly certain that the problem is indeed the platform post SU9- but we want to finish the work before we declare that with certainty.

                                                ....

                                                Stay tuned. We will let you know what our results show.
                                                Apologies if I missed this, did you complete your investigations and were there any discoveries you could share, maybe some work arounds please?

                                                For me I tracked it down to Ships and Ferries being above zero under traffic when using 3rd party ship traffic add ons, my guess is the algorithm just can't handle having a big ship traffic database and doesn't cull on spawning them and just tries to spawn them all.
                                                Last edited by HansRoaming; 07Aug2022, 16:17.
                                                Iain Colledge

                                                Comment


                                                  #30
                                                  I haven't had this issue ever since I switched my USB ports to not "sleep when inactive" (or whatever its officially called). I think what was happening, during long flights, there's minimal inputs from USB devices, including mouse, keyboard, TrackiR, joystick, et al. Once you start interacting with those items, they have to "wake back up". Ever since I changed all my ports to be "on" all the time, I don't see this problem, or its way, way less worse.

                                                  Comment

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