britton_21 BR
@britton_21
Minecraft Oct 26, 2026

how to give minecraft more ram on the default launcher?

Modded world stutters badly and the debug screen says memory is maxed out. I have 16gb in the pc but I think minecraft is only using 2. Where is the setting and how much should I actually give it without slowing windows down?
allocate more ram
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jayr Oct 29, 2026
britton_21
Installations tab, hover your profile, click the three dots > Edit > More options. In JVM arguments there's a bit near the start that says -Xmx2G. Change the 2 to 4 (or 6 for a big modpack), save, done. Don't give it more than about half your system RAM, and more isn't always better. Vanilla rarely needs above 4, and going way higher can actually make stutter worse because the cleanup pauses get longer.
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