Minecraft Java running slowly on Raspberry OS 64bit on RPi 4B 2GB (fan cooled)

[scedric]

Hello,
Thanks a lot for pi-apps it's a real time saver for me. I am fairly new in the RPi communauty and having pi-apps helps a lot to setup a new pi.
You installer for Mincecraft Java works like a charm, I also installed optifine with it. After a few tweaking in the settings to have a decent framerate the game starts smoothly. However after a few seconds of smooth gameplay it stops for a few seconds and then it alternates between smooth and stop.
The issue seems to be the Java memory heap size. The 450Mb or so of allocated memory are quickly full. On my other RPi 4B 2GB (32bit os) Minecraft is launched using the "runMC_16_1OptifineG2pre.sh" script where I modified the -Xmx (1GB) and -Xms (256MB) values to match the RPi ram and the game runs pretty smoothly.

I don't know where to set the memory heap size with the pi-apps installed Minecraft.
Is-it something that could be set automatically during the installation? Even a user input would be nice.
Thanks again :)

[NoozAbooz]

Actually, the install script is just all the commands from https://www.raspberrypi.org/forums/viewtopic.php?f=78&t=284448 smashed together. I think that you can change the xmx and xms stuff in the JVM Arguments textbox when you click "Edit Profile" in the launcher.

[scedric]

thank you. I tried that but I had another error.
I updated pi-apps today and now Minecraft won't start at all.

Executable: /opt/jdk/jdk1.8.0_251/bin/java
JVM Arguments: -Dorg.lwjgl.librarypath=/home/pi/lwjgl3arm64 -Xmx1G -Xmn128M
(as suggested here https://www.noxxtech.tk/minecraft-install)
Launcher Log:
[15:33:52] [Render thread/INFO]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', name='PROD'
[15:33:53] [Render thread/INFO]: Setting user: siroderap
[15:33:53] [Render thread/INFO]: [STDERR]: [LWJGL] [ERROR] Incompatible Java and native library versions detected.
Possible reasons:
a) -Djava.library.path is set to a folder containing shared libraries of an older LWJGL version.
b) The classpath contains jar files of an older LWJGL version.
Possible solutions:
a) Make sure to not set -Djava.library.path (it is not needed for developing with LWJGL 3) or make
sure the folder it points to contains the shared libraries of the correct LWJGL version.
b) Check the classpath and make sure to only have jar files of the same LWJGL version in it.
[15:33:53] [Render thread/INFO]: [STDERR]: [LWJGL] [ERROR] Incompatible Java and native library versions detected.
Possible reasons:
a) -Djava.library.path is set to a folder containing shared libraries of an older LWJGL version.
b) The classpath contains jar files of an older LWJGL version.
Possible solutions:
a) Make sure to not set -Djava.library.path (it is not needed for developing with LWJGL 3) or make
sure the folder it points to contains the shared libraries of the correct LWJGL version.
b) Check the classpath and make sure to only have jar files of the same LWJGL version in it.
[15:33:54] [Render thread/INFO]: Backend library: LWJGL version 3.2.2 build 10
[15:33:54] [Render thread/INFO]: [STDERR]: [LWJGL] [ERROR] Incompatible Java and native library versions detected.
Possible reasons:
a) -Djava.library.path is set to a folder containing shared libraries of an older LWJGL version.
b) The classpath contains jar files of an older LWJGL version.
Possible solutions:
a) Make sure to not set -Djava.library.path (it is not needed for developing with LWJGL 3) or make
sure the folder it points to contains the shared libraries of the correct LWJGL version.
b) Check the classpath and make sure to only have jar files of the same LWJGL version in it.
[15:33:55] [Render thread/INFO]: [STDERR]: [LWJGL] [ERROR] Incompatible Java and native library versions detected.
Possible reasons:
a) -Djava.library.path is set to a folder containing shared libraries of an older LWJGL version.
b) The classpath contains jar files of an older LWJGL version.
Possible solutions:
a) Make sure to not set -Djava.library.path (it is not needed for developing with LWJGL 3) or make
sure the folder it points to contains the shared libraries of the correct LWJGL version.
b) Check the classpath and make sure to only have jar files of the same LWJGL version in it.
[15:33:56] [Render thread/INFO]: [STDERR]: [LWJGL] [ERROR] Incompatible Java and native library versions detected.
Possible reasons:
a) -Djava.library.path is set to a folder containing shared libraries of an older LWJGL version.
b) The classpath contains jar files of an older LWJGL version.
Possible solutions:
a) Make sure to not set -Djava.library.path (it is not needed for developing with LWJGL 3) or make
sure the folder it points to contains the shared libraries of the correct LWJGL version.
b) Check the classpath and make sure to only have jar files of the same LWJGL version in it.
[15:34:01] [Render thread/WARN]: ERROR : Couldn't load Narrator library : Unable to load library 'fliteWrapper': Native library (linux-aarch64/libfliteWrapper.so) not found in resource path ([file:/home/pi/.minecraft/libraries/com/mojang/patchy/1.1/patchy-1.1.jar, file:/home/pi/.minecraft/libraries/oshi-project/oshi-core/1.1/oshi-core-1.1.jar, file:/home/pi/.minecraft/libraries/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar, file:/home/pi/.minecraft/libraries/net/java/dev/jna/platform/3.4.0/platform-3.4.0.jar, file:/home/pi/.minecraft/libraries/com/ibm/icu/icu4j/66.1/icu4j-66.1.jar, file:/home/pi/.minecraft/libraries/com/mojang/javabridge/1.0.22/javabridge-1.0.22.jar, file:/home/pi/.minecraft/libraries/net/sf/jopt-simple/jopt-simple/5.0.3/jopt-simple-5.0.3.jar, file:/home/pi/.minecraft/libraries/io/netty/netty-all/4.1.25.Final/netty-all-4.1.25.Final.jar, file:/home/pi/.minecraft/libraries/com/google/guava/guava/21.0/guava-21.0.jar, file:/home/pi/.minecraft/libraries/org/apache/commons/commons-lang3/3.5/commons-lang3-3.5.jar, file:/home/pi/.minecraft/libraries/commons-io/commons-io/2.5/commons-io-2.5.jar, file:/home/pi/.minecraft/libraries/commons-codec/commons-codec/1.10/commons-codec-1.10.jar, file:/home/pi/.minecraft/libraries/net/java/jinput/jinput/2.0.5/jinput-2.0.5.jar, file:/home/pi/.minecraft/libraries/net/java/jutils/jutils/1.0.0/jutils-1.0.0.jar, file:/home/pi/.minecraft/libraries/com/mojang/brigadier/1.0.17/brigadier-1.0.17.jar, file:/home/pi/.minecraft/libraries/com/mojang/datafixerupper/4.0.26/datafixerupper-4.0.26.jar, file:/home/pi/.minecraft/libraries/com/google/code/gson/gson/2.8.0/gson-2.8.0.jar, file:/home/pi/.minecraft/libraries/com/mojang/authlib/1.6.25/authlib-1.6.25.jar, file:/home/pi/.minecraft/libraries/org/apache/commons/commons-compress/1.8.1/commons-compress-1.8.1.jar, file:/home/pi/.minecraft/libraries/org/apache/httpcomponents/httpclient/4.3.3/httpclient-4.3.3.jar, file:/home/pi/.minecraft/libraries/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar, file:/home/pi/.minecraft/libraries/org/apache/httpcomponents/httpcore/4.3.2/httpcore-4.3.2.jar, file:/home/pi/.minecraft/libraries/it/unimi/dsi/fastutil/8.2.1/fastutil-8.2.1.jar, file:/home/pi/.minecraft/libraries/org/apache/logging/log4j/log4j-api/2.8.1/log4j-api-2.8.1.jar, file:/home/pi/.minecraft/libraries/org/apache/logging/log4j/log4j-core/2.8.1/log4j-core-2.8.1.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl/3.2.2/lwjgl-3.2.2.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl-jemalloc/3.2.2/lwjgl-jemalloc-3.2.2.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl-openal/3.2.2/lwjgl-openal-3.2.2.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl-opengl/3.2.2/lwjgl-opengl-3.2.2.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl-glfw/3.2.2/lwjgl-glfw-3.2.2.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl-stb/3.2.2/lwjgl-stb-3.2.2.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl-tinyfd/3.2.2/lwjgl-tinyfd-3.2.2.jar, file:/home/pi/.minecraft/libraries/com/mojang/text2speech/1.11.3/text2speech-1.11.3.jar, file:/home/pi/.minecraft/versions/1.16.3/1.16.3.jar])
[15:34:01] [Render thread/INFO]: Reloading ResourceManager: Default
[15:34:56] [Render thread/INFO]: [STDERR]: [LWJGL] [ERROR] Incompatible Java and native library versions detected.
Possible reasons:
a) -Djava.library.path is set to a folder containing shared libraries of an older LWJGL version.
b) The classpath contains jar files of an older LWJGL version.
Possible solutions:
a) Make sure to not set -Djava.library.path (it is not needed for developing with LWJGL 3) or make
sure the folder it points to contains the shared libraries of the correct LWJGL version.
b) Check the classpath and make sure to only have jar files of the same LWJGL version in it.
AL lib: (EE) ALCplaybackAlsa_reset: snd_pcm_hw_params_set_period_time_near failed: Invalid argument
java: pcm_params.c:170: snd1_pcm_hw_param_get_min: Assertion `!snd_interval_empty(i)' failed.

[NoozAbooz]

Umm. I think you forgot some JVM args. You seem to only have -Dorg.lwjgl.librarypath=/home/pi/lwjgl3arm64 -Xmx1G -Xmn128M whereas it normally has -Dorg.lwjgl.librarypath=/home/pi/lwjgl3arm32 -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M

[scedric]

my bad, I misread the instruction to add and the beginning of the arguments and not replace
Still an error:
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
[16:33:24] [Render thread/INFO]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', name='PROD'
[16:33:24] [Render thread/INFO]: Setting user: siroderap
[16:33:24] [Render thread/INFO]: [STDERR]: [LWJGL] [ERROR] Incompatible Java and native library versions detected.
Possible reasons:
a) -Djava.library.path is set to a folder containing shared libraries of an older LWJGL version.
b) The classpath contains jar files of an older LWJGL version.
Possible solutions:
a) Make sure to not set -Djava.library.path (it is not needed for developing with LWJGL 3) or make
sure the folder it points to contains the shared libraries of the correct LWJGL version.
b) Check the classpath and make sure to only have jar files of the same LWJGL version in it.
[16:33:24] [Render thread/INFO]: [STDERR]: [LWJGL] [ERROR] Incompatible Java and native library versions detected.
Possible reasons:
a) -Djava.library.path is set to a folder containing shared libraries of an older LWJGL version.
b) The classpath contains jar files of an older LWJGL version.
Possible solutions:
a) Make sure to not set -Djava.library.path (it is not needed for developing with LWJGL 3) or make
sure the folder it points to contains the shared libraries of the correct LWJGL version.
b) Check the classpath and make sure to only have jar files of the same LWJGL version in it.
[16:33:25] [Render thread/INFO]: Backend library: LWJGL version 3.2.2 build 10
[16:33:25] [Render thread/INFO]: [STDERR]: [LWJGL] [ERROR] Incompatible Java and native library versions detected.
Possible reasons:
a) -Djava.library.path is set to a folder containing shared libraries of an older LWJGL version.
b) The classpath contains jar files of an older LWJGL version.
Possible solutions:
a) Make sure to not set -Djava.library.path (it is not needed for developing with LWJGL 3) or make
sure the folder it points to contains the shared libraries of the correct LWJGL version.
b) Check the classpath and make sure to only have jar files of the same LWJGL version in it.
[16:33:27] [Render thread/INFO]: [STDERR]: [LWJGL] [ERROR] Incompatible Java and native library versions detected.
Possible reasons:
a) -Djava.library.path is set to a folder containing shared libraries of an older LWJGL version.
b) The classpath contains jar files of an older LWJGL version.
Possible solutions:
a) Make sure to not set -Djava.library.path (it is not needed for developing with LWJGL 3) or make
sure the folder it points to contains the shared libraries of the correct LWJGL version.
b) Check the classpath and make sure to only have jar files of the same LWJGL version in it.
[16:33:28] [Render thread/INFO]: [STDERR]: [LWJGL] [ERROR] Incompatible Java and native library versions detected.
Possible reasons:
a) -Djava.library.path is set to a folder containing shared libraries of an older LWJGL version.
b) The classpath contains jar files of an older LWJGL version.
Possible solutions:
a) Make sure to not set -Djava.library.path (it is not needed for developing with LWJGL 3) or make
sure the folder it points to contains the shared libraries of the correct LWJGL version.
b) Check the classpath and make sure to only have jar files of the same LWJGL version in it.
[16:33:33] [Render thread/WARN]: ERROR : Couldn't load Narrator library : Unable to load library 'fliteWrapper': Native library (linux-aarch64/libfliteWrapper.so) not found in resource path ([file:/home/pi/.minecraft/libraries/com/mojang/patchy/1.1/patchy-1.1.jar, file:/home/pi/.minecraft/libraries/oshi-project/oshi-core/1.1/oshi-core-1.1.jar, file:/home/pi/.minecraft/libraries/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar, file:/home/pi/.minecraft/libraries/net/java/dev/jna/platform/3.4.0/platform-3.4.0.jar, file:/home/pi/.minecraft/libraries/com/ibm/icu/icu4j/66.1/icu4j-66.1.jar, file:/home/pi/.minecraft/libraries/com/mojang/javabridge/1.0.22/javabridge-1.0.22.jar, file:/home/pi/.minecraft/libraries/net/sf/jopt-simple/jopt-simple/5.0.3/jopt-simple-5.0.3.jar, file:/home/pi/.minecraft/libraries/io/netty/netty-all/4.1.25.Final/netty-all-4.1.25.Final.jar, file:/home/pi/.minecraft/libraries/com/google/guava/guava/21.0/guava-21.0.jar, file:/home/pi/.minecraft/libraries/org/apache/commons/commons-lang3/3.5/commons-lang3-3.5.jar, file:/home/pi/.minecraft/libraries/commons-io/commons-io/2.5/commons-io-2.5.jar, file:/home/pi/.minecraft/libraries/commons-codec/commons-codec/1.10/commons-codec-1.10.jar, file:/home/pi/.minecraft/libraries/net/java/jinput/jinput/2.0.5/jinput-2.0.5.jar, file:/home/pi/.minecraft/libraries/net/java/jutils/jutils/1.0.0/jutils-1.0.0.jar, file:/home/pi/.minecraft/libraries/com/mojang/brigadier/1.0.17/brigadier-1.0.17.jar, file:/home/pi/.minecraft/libraries/com/mojang/datafixerupper/4.0.26/datafixerupper-4.0.26.jar, file:/home/pi/.minecraft/libraries/com/google/code/gson/gson/2.8.0/gson-2.8.0.jar, file:/home/pi/.minecraft/libraries/com/mojang/authlib/1.6.25/authlib-1.6.25.jar, file:/home/pi/.minecraft/libraries/org/apache/commons/commons-compress/1.8.1/commons-compress-1.8.1.jar, file:/home/pi/.minecraft/libraries/org/apache/httpcomponents/httpclient/4.3.3/httpclient-4.3.3.jar, file:/home/pi/.minecraft/libraries/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar, file:/home/pi/.minecraft/libraries/org/apache/httpcomponents/httpcore/4.3.2/httpcore-4.3.2.jar, file:/home/pi/.minecraft/libraries/it/unimi/dsi/fastutil/8.2.1/fastutil-8.2.1.jar, file:/home/pi/.minecraft/libraries/org/apache/logging/log4j/log4j-api/2.8.1/log4j-api-2.8.1.jar, file:/home/pi/.minecraft/libraries/org/apache/logging/log4j/log4j-core/2.8.1/log4j-core-2.8.1.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl/3.2.2/lwjgl-3.2.2.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl-jemalloc/3.2.2/lwjgl-jemalloc-3.2.2.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl-openal/3.2.2/lwjgl-openal-3.2.2.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl-opengl/3.2.2/lwjgl-opengl-3.2.2.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl-glfw/3.2.2/lwjgl-glfw-3.2.2.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl-stb/3.2.2/lwjgl-stb-3.2.2.jar, file:/home/pi/.minecraft/libraries/org/lwjgl/lwjgl-tinyfd/3.2.2/lwjgl-tinyfd-3.2.2.jar, file:/home/pi/.minecraft/libraries/com/mojang/text2speech/1.11.3/text2speech-1.11.3.jar, file:/home/pi/.minecraft/versions/1.16.3/1.16.3.jar])
[16:33:34] [Render thread/INFO]: Reloading ResourceManager: Default
[16:34:33] [Render thread/INFO]: [STDERR]: [LWJGL] [ERROR] Incompatible Java and native library versions detected.
Possible reasons:
a) -Djava.library.path is set to a folder containing shared libraries of an older LWJGL version.
b) The classpath contains jar files of an older LWJGL version.
Possible solutions:
a) Make sure to not set -Djava.library.path (it is not needed for developing with LWJGL 3) or make
sure the folder it points to contains the shared libraries of the correct LWJGL version.
b) Check the classpath and make sure to only have jar files of the same LWJGL version in it.
AL lib: (EE) ALCplaybackAlsa_reset: snd_pcm_hw_params_set_period_time_near failed: Invalid argument
java: pcm_params.c:170: snd1_pcm_hw_param_get_min: Assertion `!snd_interval_empty(i)' failed.

[scedric]

[NoozAbooz]

I suggest you go ask at https://www.raspberrypi.org/forums/viewtopic.php?f=78&t=284448.

[scedric]

I'll do it, thanks for the help :)

[NoozAbooz]

Has it worked yet? If it has then please close this issue.

[scedric]

nope, I posted on the link you sent earlier.
I guess I'll close the issue since it's not related to pi-apps.
Thanks again!

[NoozAbooz]

np