tomcate 启动报内存溢出问题 “PermGen space”

tomcat的bin目录里面的catalina..bat或是catalina.sh

# ----- Execute The Requested Command -----------------------------------------
JAVA_OPTS='-server -Xms5120m -Xmx5120m -Xmn1024m -XX:PermSize=1024m -XX:MaxPermSize=1024m'
# Bugzilla 37848: only output this if we have a TTY

添加 红色的 代码即可，