增加tomcat jvm的虚拟内存

qq591577286

　　jdk1.6.0
　　tomcat6.0（安装版）
　　报错如下：

2012-3-22 1:12:34 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet default threw exception
java.lang.OutOfMemoryError: Java heap space
at sun.text.UCompactIntArray.initPlane(Unknown Source)
at sun.text.UCompactIntArray.setElementAt(Unknown Source)
at java.text.RBTableBuilder.addOrder(Unknown Source)
at java.text.RBTableBuilder.addComposedChars(Unknown Source)
at java.text.RBTableBuilder.build(Unknown Source)
at java.text.RBCollationTables.<init>(Unknown Source)
at java.text.RuleBasedCollator.<init>(Unknown Source)
at java.text.Collator.getInstance(Unknown Source)
at freemarker.core.Environment.getCollator(Environment.java:736)
at freemarker.core.ComparisonExpression.isTrue(ComparisonExpression.java:165)
at freemarker.core.IfBlock.accept(IfBlock.java:80)
at freemarker.core.Environment.visit(Environment.java:209)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:209)
at freemarker.core.Environment.process(Environment.java:189)
at freemarker.template.Template.process(Template.java:237)
at org.apache.struts2.views.freemarker.FreemarkerResult.doExecute(FreemarkerResult.java:187)
at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:361)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:265)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at com.ponyjava.common.struts2.interceptor.UrlInterceptor.doIntercept(Unknown Source)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
at org.apache.struts2.components.ActionComponent.executeAction(ActionComponent.java:289)
at org.apache.struts2.components.ActionComponent.end(ActionComponent.java:172)
at org.apache.struts2.views.freemarker.tags.CallbackWriter.afterBody(CallbackWriter.java:84)

“可以找找看应用目录下面有没有生成 dump 文件，大小一般比你所配置JVM内存大小更大些。

然后用工具对dump文件进行分析，寻找数量多的可疑对象。——ldh911”
　　解决中。。。
　　目前解决方案：
　　增加jvm的虚拟内存

　　由于tomcat是安装版本，于是采用修改注册表方法：
　　运行regedit

　　找到
　　Apache SoftWare Foundation/Prorun2.0/Tomcat6/Parameters/Options
　　双击Options->
　　

-Dcatalina.home=D:\Tomcat 6.0
-Dcatalina.base=D:\Tomcat 6.0
-Djava.endorsed.dirs=D:\Tomcat 6.0\endorsed
-Djava.io.tmpdir=D:\Tomcat 6.0\temp
-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
-Djava.util.logging.config.file=D:\Tomcat 6.0\conf\logging.properties



在结尾添加　　

-Xms512m
-Xmx512m然后重启tomcat进入　　http://localhost:8080/manager/status
　　查看Free memory: 486.02 MB Total memory: 508.06 MB Max memory:
508.06 MB