In my case I manage to launch UP3.4 with 512/128 settings however with dynamic memory the system is unstable and I had to disable vertex array to avoid a freeze at mission launch and the performance is reduced with more stutters and lower FPS while with the selector 5.1.2 and 512 of set memory UP.3.4 is my best performer. Amazingly enough I can launch UP2 with the 700/256 and even tough I still have some instability the performance is similar to the UP2 with the 5.1.2 selector and 512 of set memory. Will continue my tests
PS I have 2 GB of memory initlog below
2024-12-19 14:35:29:796 (dinput.dll) : JVM Parameters injector activated
2024-12-19 14:35:29:812 (dinput.dll) : ReadJvmOptions()
2024-12-19 14:35:29:812 (dinput.dll) : IL-2 Process ID = 00000FD4
2024-12-19 14:35:29:812 (dinput.dll) : Starting Watchdog at C:\Programmi\Ubisoft\IL-2_4101_UP34\bin\selector\basefiles\IL-2 Watchdog.exe 1 ""
2024-12-19 14:35:29:828 (dinput.dll) : Watchdog process started.
2024-12-19 14:35:29:828 (dinput.dll) : Starting Pipe Logger at C:\Programmi\Ubisoft\IL-2_4101_UP34\bin\selector\basefiles\PipeLogger.exe
2024-12-19 14:35:29:875 (dinput.dll) : PipeLogger process started.
2024-12-19 14:35:30:359 (PipeLogger) : PipeLogger Starting
2024-12-19 14:35:30:359 (PipeLogger) : Reading PipeLogger Settings from C:\Programmi\Ubisoft\IL-2_4101_UP34\il2fb.ini
2024-12-19 14:35:30:359 (PipeLogger) : PipeLogger Settings:
2024-12-19 14:35:30:359 (PipeLogger) : ShowLogWarnings = false
2024-12-19 14:35:30:359 (PipeLogger) : LogSizeThreshold = 10,000,000 Bytes
2024-12-19 14:35:30:359 (PipeLogger) : ExceptionThreshold = 10 Exceptions
2024-12-19 14:35:30:359 (PipeLogger) : ErrorThreshold = 0 Errors
2024-12-19 14:35:30:375 (PipeLogger) : PipeLogger Process ID: 00000C88; Parent (IL-2) Process ID: 00000FD4
2024-12-19 14:35:30:375 (PipeLogger) : Listener thread awaiting client connection on \\.\pipe\SAS_PIPE_LOGGER
2024-12-19 14:35:30:515 (watchdog) : IL-2 Parent Process Handle = 00000044, ID=00000FD4
2024-12-19 14:35:30:515 (watchdog) : IL-2 Watchdog started.
2024-12-19 14:35:30:515 (watchdog) : Splash Screen Mode = 1
2024-12-19 14:35:30:515 (watchdog) : Splash Screen Image Path =
2024-12-19 14:35:30:515 (watchdog) : Splash Screen Image Full Path = C:\Programmi\Ubisoft\IL-2_4101_UP34
2024-12-19 14:35:30:515 (watchdog) : Message Window Created.
2024-12-19 14:35:30:515 (watchdog) : LoadSplashImage.
2024-12-19 14:35:30:921 (dinput.dll) : Attach SAS_CreateJavaVM = OK
2024-12-19 14:35:30:953 (dinput.dll) : Attach SAS_SFS_mount = OK
2024-12-19 14:35:30:953 (dinput.dll) : AdjustJvmParams: Mod Flag NOT set!
2024-12-19 14:35:30:968 (watchdog) : Loading Splash Image from embedded Resource, Handle=00171AE0
2024-12-19 14:35:31:078 (watchdog) : Splash Screen Created.
2024-12-19 14:35:31:171 (dinput.dll) : Hooked "SAS_CreateJavaVM" function activated
2024-12-19 14:35:31:171 (dinput.dll) : Applying JVM Memory Settings from IL-2 Selector...
2024-12-19 14:35:31:171 (dinput.dll) : Checking for presence of JVM Option: -xms
2024-12-19 14:35:31:171 (dinput.dll) : Added JVM Option: -Xms96M
2024-12-19 14:35:31:171 (dinput.dll) : Checking for presence of JVM Option: -xmx
2024-12-19 14:35:31:171 (dinput.dll) : Added JVM Option: -Xmx255M
2024-12-19 14:35:31:171 (dinput.dll) : Checking for presence of JVM Option: -xss
2024-12-19 14:35:31:171 (dinput.dll) : Added JVM Option: -Xss1024K
2024-12-19 14:35:31:187 (dinput.dll) : Checking for presence of JVM Option: -xx:maxpermsize=
2024-12-19 14:35:31:187 (dinput.dll) : Added JVM Option: -XX:MaxPermSize=256M
2024-12-19 14:35:31:187 (dinput.dll) : Checking mandatory JVM Options...
2024-12-19 14:35:31:187 (dinput.dll) : Checking for presence of JVM Option: -djava.class.path=
2024-12-19 14:35:31:187 (dinput.dll) : Added JVM Option: -Djava.class.path=.
2024-12-19 14:35:31:187 (dinput.dll) : Checking for presence of JVM Option: -xverify:none
2024-12-19 14:35:31:187 (dinput.dll) : Added JVM Option: -Xverify:none
2024-12-19 14:35:31:187 (dinput.dll) : Checking for presence of JVM Option: -xcomp
2024-12-19 14:35:31:187 (dinput.dll) : Added JVM Option: -Xcomp
2024-12-19 14:35:31:187 (dinput.dll) : Checking for presence of JVM Option: -xnoclassgc
2024-12-19 14:35:31:187 (dinput.dll) : Added JVM Option: -Xnoclassgc
2024-12-19 14:35:31:187 (dinput.dll) : OpenGL Mode detected, checking IL-2 Graphics Extender Availability...
2024-12-19 14:35:31:187 (dinput.dll) : Trying C:\Programmi\Ubisoft\IL-2_4101_UP34\il2ge.dll
2024-12-19 14:35:31:187 (dinput.dll) : Trying C:\Programmi\Ubisoft\IL-2_4101_UP34\il2ge\lib\il2ge.dll
2024-12-19 14:35:31:187 (dinput.dll) : Trying C:\Programmi\Ubisoft\IL-2_4101_UP34\bin\selector\basefiles\il2ge.dll
2024-12-19 14:35:31:187 (dinput.dll) : IL-2 Graphics Extender not available.
2024-12-19 14:35:31:187 (dinput.dll) : Injecting JVM Parameters
2024-12-19 14:35:31:187 (dinput.dll) : Final JVM Option: -Djava.class.path=.
2024-12-19 14:35:31:187 (dinput.dll) : Final JVM Option: -Xcomp
2024-12-19 14:35:31:187 (dinput.dll) : Final JVM Option: -Xms96M
2024-12-19 14:35:31:187 (dinput.dll) : Final JVM Option: -Xmx255M
2024-12-19 14:35:31:187 (dinput.dll) : Final JVM Option: -Xnoclassgc
2024-12-19 14:35:31:187 (dinput.dll) : Final JVM Option: -Xss1024K
2024-12-19 14:35:31:187 (dinput.dll) : Final JVM Option: -Xverify:none
2024-12-19 14:35:31:187 (dinput.dll) : Final JVM Option: -XX:MaxPermSize=256M
2024-12-19 14:35:31:593 (dinput.dll) : Java Virtual Machine Initialization with additional parameters successful!
2024-12-19 14:35:31:640 (wrapper) : ProcessAttach, attached Processes = 1
2024-12-19 14:35:31:640 (wrapper) : Calling getCommandLineParams()
2024-12-19 14:35:31:640 (wrapper) : Command Line Parameter No. 1 = /f:none
2024-12-19 14:35:31:640 (wrapper) : Command Line Parameter No. 2 = /m:#up#
2024-12-19 14:35:31:640 (wrapper) : Command Line Parameter No. 3 = /lb:il2fb.exe
2024-12-19 14:35:31:640 (wrapper) : MODS Folder = "#up#"
2024-12-19 14:35:31:640 (wrapper) : No FILES Folder set
2024-12-19 14:35:31:640 (wrapper) : Calling linkIl2fbExe()
2024-12-19 14:35:31:640 (wrapper) : Trying to link back to C:\Programmi\Ubisoft\IL-2_4101_UP34\il2fb.exe through LoadLibrary()
2024-12-19 14:35:31:687 (wrapper) : Calling createModsFolderList()
2024-12-19 14:35:38:437 (wrapper) : Scanning #up# folder took 6757 milliseconds.
2024-12-19 14:35:38:437 (wrapper) : Total number of modded files = 5259.
2024-12-19 14:35:38:437 (wrapper) : Calling sortList()
2024-12-19 14:35:38:437 (wrapper) : Sorting modded files list took 2.368 milliseconds.
2024-12-19 14:35:38:437 (wrapper) : Calling removeDuplicates()
2024-12-19 14:35:38:437 (wrapper) : Removing 4 Duplicates took 0.408 milliseconds.
2024-12-19 14:35:43:062 (PipeLogger) : Client connected, creating a new Listener Thread & new Instance Thread for this Client.
2024-12-19 14:35:43:062 (PipeLogger) : Waiting for Pipe Instance to initialize...
2024-12-19 14:35:43:062 (PipeLogger) : Listener thread awaiting client connection on \\.\pipe\SAS_PIPE_LOGGER
2024-12-19 14:35:43:062 (PipeLogger) : Pipe Instance initialized successfully
2024-12-19 14:35:43:062 (PipeLogger) : InstanceThread No.1 created, receiving and processing messages on \\.\pipe\SAS_PIPE_LOGGER
2024-12-19 14:35:43:062 (PipeLogger) : Logfile for instance No.1 is c:\programmi\ubisoft\il-2_4101_up34\log.lst
2024-12-19 14:35:43:062 (PipeLogger) : Flush Timeout for instance No.1 is 1000 Milliseconds
2024-12-19 14:35:43:062 (PipeLogger) : Log Writer No.1 running
2024-12-19 14:35:43:359 (watchdog) : IL-2 Main Window created: "Il2-1946_UP3.4" (MaddoxRtsWndClassW), Handle= 0x00160298
2024-12-19 14:35:43:375 (watchdog) : Activating IL-2 Main Window (0x00160298) using SwitchToThisWindow()
2024-12-19 14:35:44:359 (watchdog) : Successfully activated IL-2 Main Window (Handle: 0x00160298)
2024-12-19 14:35:46:906 (wrapper) : ThreadAttach, attached Threads = 1
2024-12-19 14:35:47:125 (wrapper) : ThreadAttach, attached Threads = 2
2024-12-19 14:35:48:828 (wrapper) : ThreadAttach, attached Threads = 3
2024-12-19 14:35:49:703 (wrapper) : ThreadAttach, attached Threads = 4
2024-12-19 14:35:50:234 (wrapper) : ThreadAttach, attached Threads = 5
2024-12-19 14:35:50:359 (wrapper) : ThreadAttach, attached Threads = 6
2024-12-19 14:35:50:390 (wrapper) : ThreadAttach, attached Threads = 7
2024-12-19 14:37:26:937 (wrapper) : ThreadAttach, attached Threads = 8
2024-12-19 14:37:26:937 (wrapper) : ThreadDetach, attached Threads = 7
2024-12-19 14:37:48:406 (wrapper) : ThreadAttach, attached Threads = 8
2024-12-19 14:37:48:406 (PipeLogger) : Client connected, creating a new Listener Thread & new Instance Thread for this Client.
2024-12-19 14:37:48:406 (PipeLogger) : Waiting for Pipe Instance to initialize...
2024-12-19 14:37:48:406 (PipeLogger) : Listener thread awaiting client connection on \\.\pipe\SAS_PIPE_LOGGER
2024-12-19 14:37:48:406 (PipeLogger) : Pipe Instance initialized successfully
2024-12-19 14:37:48:406 (PipeLogger) : InstanceThread No.2 created, receiving and processing messages on \\.\pipe\SAS_PIPE_LOGGER
2024-12-19 14:37:48:406 (PipeLogger) : Logfile for instance No.2 is c:\programmi\ubisoft\il-2_4101_up34\eventlog.lst
2024-12-19 14:37:48:406 (PipeLogger) : Flush Timeout for instance No.2 is 1000 Milliseconds
2024-12-19 14:37:48:406 (PipeLogger) : Log Writer No.2 running
2024-12-19 14:40:36:093 (wrapper) : ThreadAttach, attached Threads = 9
2024-12-19 14:40:36:093 (wrapper) : ThreadDetach, attached Threads = 8
2024-12-19 14:40:36:968 (wrapper) : ThreadAttach, attached Threads = 9
2024-12-19 14:40:36:968 (wrapper) : ThreadDetach, attached Threads = 8
2024-12-19 14:40:38:046 (wrapper) : ThreadAttach, attached Threads = 9
2024-12-19 14:40:38:046 (wrapper) : ThreadDetach, attached Threads = 8
2024-12-19 14:40:38:968 (wrapper) : ThreadAttach, attached Threads = 9
2024-12-19 14:40:38:968 (wrapper) : ThreadDetach, attached Threads = 8
2024-12-19 14:40:51:390 (PipeLogger) : InstanceThread No.1 ReadFile failed, GLE=0.
2024-12-19 14:40:51:390 (PipeLogger) : InstanceThread No.1 terminating...
2024-12-19 14:40:51:390 (PipeLogger) : Log Writer No.1 terminated. 22,848 bytes written, 0 exceptions, 0 errors.
2024-12-19 14:40:51:390 (PipeLogger) : InstanceThread No.1 terminated
2024-12-19 14:40:51:406 (wrapper) : ThreadDetach, attached Threads = 7
2024-12-19 14:40:51:406 (wrapper) : ThreadDetach, attached Threads = 6
2024-12-19 14:40:51:406 (wrapper) : ThreadDetach, attached Threads = 5
2024-12-19 14:40:51:750 (wrapper) : ThreadDetach, attached Threads = 4
2024-12-19 14:40:51:750 (wrapper) : ThreadDetach, attached Threads = 3
2024-12-19 14:40:51:812 (watchdog) : IL-2 Main Window destroyed: "Il2-1946_UP3.4" (MaddoxRtsWndClassW), Handle= 0x00160298
2024-12-19 14:40:51:812 (watchdog) : IL-2 main window (handle 0x00160298) disappeared, checking process status.
2024-12-19 14:40:51:812 (PipeLogger) : InstanceThread No.2 ReadFile failed, GLE=0.
2024-12-19 14:40:51:812 (PipeLogger) : InstanceThread No.2 terminating...
2024-12-19 14:40:51:812 (PipeLogger) : Log Writer No.2 terminated. 3,527 bytes written, 0 exceptions, 0 errors.
2024-12-19 14:40:51:812 (PipeLogger) : InstanceThread No.2 terminated
2024-12-19 14:40:51:828 (wrapper) : ThreadDetach, attached Threads = 2
2024-12-19 14:40:51:828 (wrapper) : ThreadDetach, attached Threads = 1
2024-12-19 14:40:56:812 (watchdog) : il2fb.exe process is still running even 5000 milliseconds after main window has been closed, terminating process now.
2024-12-19 14:40:56:875 (PipeLogger) : il2fb.exe Termination detected, terminating Pipe Logger.
2024-12-19 14:40:56:875 (PipeLogger) : All Writers Threads finished, exiting.