Fix CleanroomMC jvma

Author: tier940

cmmc/instance.cfg

@@ -18,7 +18,7 @@ OverrideJavaLocation=true
 OverrideMemory=false
 OverrideNativeWorkarounds=false
 OverrideWindow=false
-JvmArgs=-XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGuaranteedGCInterval=100000 -XX:AllocatePrefetchStyle=1 -XX:+DisableExplicitGC -XX:+UseNUMA -XX:+UseLargePages -XX:+PerfDisableSharedMem -XX:+UseFastUnorderedTimeStamps -XX:+UseCriticalJavaThreadPriority
+JvmArgs=-XX:+UnlockDiagnosticVMOptions -XX:+UseShenandoahGC -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCMode=generational -XX:ShenandoahGuaranteedGCInterval=100000 -XX:AllocatePrefetchStyle=1 -XX:+DisableExplicitGC -XX:+UseNUMA -XX:+UseLargePages -XX:+PerfDisableSharedMem -XX:+UseFastUnorderedTimeStamps -XX:+UseCriticalJavaThreadPriority
 lastLaunchTime=0
 lastTimePlayed=0
 name=[Cleanroom] GregTech Expert 2 MODPACKVERSION