系统大全为您提供 不可行的方法   最初我直接修改catalina.sh, 将JAVA_OPTS变量加上了   -server -Xms1G -Xmx1G -XX:+UserG1GC 最初看起来没啥问题，但是当服务器运行几天后，发现执行shutdown.sh无法关闭tomcat， 错误信息如下：   # root@iZ94hjppdqzZ:~/projects/taolijie# cat hs_err_pid5519.log  # There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (mmap) failed to map 1073741824 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:2673), pid=5519, tid=3061726064 # # JRE version:  (8.0_45-b14) (build ) # Java VM: Java HotSpot(TM) Server VM (25.45-b02 mixed mode linux-x86 ) # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again # 关闭个tomcat要请求1G的内存， 当时服务器就剩下200M内存，所以Out Of Memory了。查看shutdown.sh，发现它其实还是调用了catalina.sh，只是传入了一个stop参数。而catalina.sh是执行了   org.apache.catalina.startup.Bootstrap stop 来向tomcat发送关闭信息的。由于上面我们设置了JAVA_OPTS使用1G的堆，因此执行该类时JVM会向系统申请1G多的内存，直接导致Out Of Memory。   可行的方法   在catalina.sh的第二行添加：   CATALINA_OPTS="$CATALINA_OPTS -server -Xms1G -Xmx1G -XX:+UseG1GC" 这些VM参数就会只应用到catalina而不是所有Tomcat进程。　     　　   以上就是系统大全给大家介绍的如何使的方法都有一定的了解了吧，好了，如果大家还想了解更多的资讯，那就赶紧点击系统大全官网吧。    本文来自系统大全https://www.herecours.com/d/file/efpub/2026/26-26/20260226104205565684