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140 mods limit?


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I have strange problem.If I have installed about 130 mods all works fine I have stable FPS.But when I have installed about 140 mods, game works for about 5 minutes and then I see "shutting down internal server" message without crash.If I have installed 140+ mods but I can't create a world.

In log:java.lang.OutOfMemoryError: PermGen space. I know what that means out of memory.But I allocate more memory 2GB and 4GB.And It doesn't help.

I saw some people, who have installed 150 and more mods and game works fine.But why I can't do this?

Pic from mcforum by some user-> db6d28ad3b02ed6a72b0c8108ee2e854.png

Any suggestions?Perhaps it's a stupid question but still...

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I had this very same issue yesterday, so just registered to help out.


after a bit of googling, I added " -XX:MaxPermSize=128m" to my MultiMC extra java settings, and everything has been smooth since.  How you add this java parameter will depend on how you are running Minecraft of course.


The number might need increasing though, as I am only(?) running 80+ mods right now.



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  • 6 months later...

Chiming in -- I began having this issue today after switching from the FTB Unleashed beta to the recently released FTB Unleashed version. I enabled a few of the disabled mods (like Biomes O' Plenty) and booted up a new server. I couldn't get more than a few seconds in before this issue started.


I added tekkyjim's suggestion to my startserver.bat and the server is working fine.



java -Xms1024M -Xmx2G -XX:MaxPermSize=256M -jar ftbserver.jar


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