JVM Args?
Im trying to find best java args because the game has been lagging and filling out my ram even if I allocate half of my ram here is the one that I use right now
-XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions -XX:+AlwaysActAsServerClassMachine -XX:+AlwaysPreTouch -XX:+DisableExplicitGC -XX:+UseZGC -XX:+ZGenerational -XX:+UseNUMA -XX:NmethodSweepActivity=1 -XX:ReservedCodeCacheSize=400M -XX:NonNMethodCodeHeapSize=12M -XX:ProfiledCodeHeapSize=194M -XX:NonProfiledCodeHeapSize=194M -XX:-DontCompileHugeMethods -XX:MaxNodeLimit=240000 -XX:NodeLimitFudgeFactor=8000 -XX:+UseVectorCmov -XX:+PerfDisableSharedMem -XX:+UseFastUnorderedTimeStamps -XX:+UseCriticalJavaThreadPriority -XX:ThreadPriorityPolicy=1 -XX:AllocatePrefetchStyle=3
What should be replaced or removed from this and what should be added?
7 Replies
Try simplifying it to
-XX:+UnlockExperimentalVMOptions -XX:+UseZGC -XX:+ZGenerational -XX:+AlwaysPreTouch -XX:+UseFastUnorderedTimeStamps
How much do you allocate to MC and how much do you have in your system?
Using those flags with a lot of mods puts my RAM at stable 14 GB if I allocate over it and the game if perfectly happy with 12 GB or even less, like 10 GB (I have not tested smaller amounts)
Z GC is designed to be self tuning so changing a lot of GC options is unrecommended
XX:+UseCriticalJavaThreadPriority can in theory reduce your RAM usage a bit, but it will decrease your fps and generation speed
Also try adding mods such as:
- Ferritecore
- Krypton
- ModernFix
To reduce the RAM usage of the gameHow much ram do you have ?
12 allocated at the moment with 32 in the system, and during testing MC did stop at a stable 14 GB
I use a lot of mods with audio track and such that use a lot of RAM as well as a 256x resourcepack and Photon shaders
I have 16 only allocated 8 or 10 of it but it always goes above 12 13 gigs because of lods I think
try installing these mods: https://discord.com/channels/881614130614767666/1266014657177587723/1266028877990461530
and lower the CPU impact in DH settings
they are already in the modpack
will configure dh to see effects
thats a good amt of ram
I also use a lot of mods
my Computer has 24 gigs
13 allocated