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在tomcat中产生如下文件且报错：

-rw-rw-r-- 1 17946 Feb 21 09:24 hs_err_pid20807.log

-rw-rw-r-- 1 17897 Feb 21 09:25 hs_err_pid20917.log

-rw-rw-r-- 1 17996 Feb 21 09:29 hs_err_pid21620.log

-rw-rw-r-- 1 17996 Feb 21 09:29 hs_err_pid21685.log

-rw-rw-r-- 1 18045 Feb 21 09:30 hs_err_pid21808.log

-rw-rw-r-- 1 17996 Feb 21 09:31 hs_err_pid21961.log

-rw-rw-r-- 1 18045 Feb 21 09:31 hs_err_pid22019.log

-rw-rw-r-- 1 17996 Feb 21 09:33 hs_err_pid22430.log

-rw-rw-r-- 1 17996 Feb 21 09:33 hs_err_pid22448.log

-rw-rw-r-- 1 17997 Feb 21 09:38 hs_err_pid23291.log

-rw-rw-r-- 1 17898 Feb 21 09:39 hs_err_pid23517.log

-rw-rw-r-- 1 17997 Feb 21 09:40 hs_err_pid23591.log

-rw-rw-r-- 1 17997 Feb 21 09:41 hs_err_pid23763.log

-rw-rw-r-- 1 17994 Feb 21 09:46 hs_err_pid24644.log

Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_mem

Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000006c0000000, 4160749568, 0) failed; error='Cannot allocate memory' (errno=12)

#

# There is insufficient memory for the Java Runtime Environment to continue.

# Native memory allocation (mmap) failed to map 4160749568 bytes for committing reserved memory.

# An error report file with more information is saved as:

# /usr/local/tomcat/tomcat_adver_admin_8106/hs_err_pid21620.log

解决方案：

修改bin目录下的Catalina.sh

JAVA_OPTS="$JAVA_OPTS -Xms512m -Xmx1G -XX:MaxNewSize=128m -Djava.awt.headless=true -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager"

新添加一行：

CATALINA_OPTS="$CATALINA_OPTS -server -Xms1G -Xmx1G -XX:+UseG1GC"