minecraft laucher crashes with an error that signal low memory, but I don't know how to fix it.

[mem_fox]

the crash report says the following:## There is insufficient memory for the Java Runtime Environment to continue.# Native memory allocation (mmap) failed to map 402653184 bytes for G1 virtual space# Possible reasons:# The system is out of physical RAM or swap space# The process is running with CompressedOops enabled, and the Java Heap may be blocking the growth of the native heap# Possible solutions:# Reduce memory load on the system# Increase physical memory or swap space# Check if swap backing store is full# Decrease Java heap size (-Xmx/-Xms)# Decrease number of Java threads#

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