服务器上运行的Minecraft服务突然崩溃，提示There is insufficient memory for the Java Runtime Environment to continue.

Native memory allocation (malloc) failed to allocate 1009872896 bytes for committing reserved memory.

Possible reasons:

The system is out of physical RAM or swap space

In 32 bit mode, the process size limit was hit

Possible solutions:

Reduce memory load on the system

Increase physical memory or swap space

Check if swap backing store is full

Use 64 bit Java on a 64 bit OS

Decrease Java heap size (-Xmx/-Xms)

Decrease number of Java threads

Decrease Java thread stack sizes (-Xss)

Set larger code cache with -XX:ReservedCodeCacheSize=

This output file may be truncated or incomplete.

Out of Memory Error (os_linux.cpp:2827), pid=1775, tid=139783409272576

JRE version: OpenJDK Runtime Environment (7.0_121) (build 1.7.0_121-mockbuild_2016_11_11_19_18-b00)

Java VM: OpenJDK 64-Bit Server VM (24.121-b00 mixed mode linux-amd64 compressed oops)

Derivative: IcedTea 2.6.8

Distribution: CentOS release 6.8 (Final), package rhel-2.6.8.1.el6_8-x86_64 u121-b00

Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again

之后服务器无法输入指令，重启后登录之后1分钟就无法输入指令，求大神帮忙