tomcat maven plugin 设置启动内存

<plugin>    <groupId>org.codehaus.mojo</groupId>    <artifactId>tomcat-maven-plugin</artifactId>    <version>1.1</version>    <configuration><path>/</path><systemProperties>    <JAVA_OPTS>-Xms512m -Xmx1024m -XX:MaxPermSize=256m</JAVA_OPTS></systemProperties>    </configuration></plugin>