Tomcat Configuration 查看一下可以配置的参数

设置 JVM 的参数 Setting JVM Options for Tomcat

Edit the /usr/locat/apache-tomcat/bin/catalina.sh file and add the JVM options to the JAVA_OPTS environment variable.JVM Option Value Description
-Xmx 4g The maximum Java heap size.
-Xms 4g The initial Java heap size.
-Xmn 1g The size of young generation.
-XX:+UseParallelGC – To use parallel garbage collection for scavenges.
-XX:PermSize 50m The initial size of permanent generation.
注释：上面两个 4g 的值，我没试过，我用 8GB 内存 windows 的机器 1.5GB …