以下方案我是在Intel xeon(至强) 3.2G 2个双核物理CPU+2G内存(Ecc)上进行：
resin版本为resin-pro-3.0.21，JVM为Jrockit 1.5_06， resin java 启动参数 -Xms256m -Xmx512m
1. 以下为resin.conf配置
<!--
- Resin 3.0 configuration file.
-->
<resin xmlns="http://caucho.com/ns/resin"
xmlns:resin="http://caucho.com/ns/resin/core">
<!--
- Logging configuration for the JDK logging API.
-->
<log name="" level="all" path="stdout:" timestamp="[%H:%M:%S.%s] "/>
<logger name="com.caucho.java" level="config"/>
<logger name="com.caucho.loader" level="config"/>
<dependency-check-interval>600s</dependency-check-interval>
<javac compiler="internal" args=""/>
<thread-pool>
<thread-max>10240</thread-max>
<spare-thread-min>50</spare-thread-min>
</thread-pool>
<min-free-memory>5M</min-free-memory>
<server>
<class-loader>
<tree-loader path="${resin.home}/lib"/>
<tree-loader path="${server.root}/lib"/>
</class-loader>
<keepalive-max>1024</keepalive-max>
<keepalive-timeout>60s</keepalive-timeout>
<resin:if test="${resin.isProfessional()}">
<select-manager enable="true"/>
</resin:if>
<bind-ports-after-start/>
<http server-id="" host="*" port="80"/>
<cluster>
<srun server-id="" host="127.0.0.1" port="6802"/>
</cluster>
<resin:if test="${resin.isProfessional()}">
<persistent-store type="cluster">
<init path="session"/>
</persistent-store>
</resin:if>
<ignore-client-disconnect>true</ignore-client-disconnect>
<resin:if test="${isResinProfessional}">
<cache path="cache" memory-size="20M"/>
</resin:if>
<web-app-default>
<class-loader>
<tree-loader path="${server.root}/ext-webapp"/>
</class-loader>
<cache-mapping url-pattern="/" expires="60s"/>
<cache-mapping url-pattern="*.gif" expires="600s"/>
<cache-mapping url-pattern="*.jpg" expires="600s"/>
<servlet servlet-name="directory"
servlet-class="com.caucho.servlets.DirectoryServlet">
<init enable="false"/>
</servlet>
<allow-servlet-el/>
<session-config>
<enable-url-rewriting>false</enable-url-rewriting>
</session-config>
</web-app-default>
<host-default>
<class-loader>
<compiling-loader path="webapps/WEB-INF/classes"/>
<library-loader path="webapps/WEB-INF/lib"/>
</class-loader>
<!--access-log path="logs/access.log"
format='%h %l %u %t "%r" %s %b "%{Referer}i" "%{User-Agent}i"'
rollover-period="1W"/-->
<web-app-deploy path="webapps"/>
<ear-deploy path="deploy">
<ear-default>
<!-- Configure this for the ejb server
-
- <ejb-server>
- <config-directory>WEB-INF</config-directory>
- <data-source>jdbc/test</data-source>
- </ejb-server>
-->
</ear-default>
</ear-deploy>
<resource-deploy path="deploy"/>
<web-app-deploy path="deploy"/>
</host-default>
<resin:import path="${resin.home}/conf/app-default.xml"/>
<host-deploy path="hosts">
<host-default>
<resin:import path="host.xml" optional="true"/>
</host-default>
</host-deploy>
<host id="" root-directory=".">
<web-app id="/" document-directory="d:\website\chat">
</web-app>
</host>
</server>
</resin>
2. 在应用的web.xml中加入resin status查看servlet映射
<servlet-mapping servlet-class='com.caucho.servlets.ResinStatusServlet'>
<url-pattern>/resin-status</url-pattern>
<init enable="read"/>
</servlet-mapping>
3. 启动resin，确认应用正常启动。
4. 写访问测试程序
import java.io.InputStream;
import java.net.URL;
public class TestURL
{
public static void main(String[] args) throws Exception
{
long a = System.currentTimeMillis();
System.out.println("Starting request url:");
for(int i = 0; i < 10000; i++){
URL url = new URL("http://192.168.1.200/main.jsp");
InputStream is = url.openStream();
is.close();
System.out.println("Starting request url:"+i);
}
System.out.println("request url end.take "(System.currentTimeMillis()-a)"ms");
}
}
5. 在Jbuilder中执行TestURL
在执行过程中，一边刷新http://192.168.1.200/resin-status，查看resin状态,在http://*:80 中的 Active Threads 和 Total，会一直增长，当长到512的时候不再增长，这时再刷新resin-status页面时，会发现打开很慢。原因是服务器已经达到最大连接数，在等待前面连接的释放而不能接受新的连接。
于是下载Resin 3.0.21源码，搜索 512，发现com.caucho.server.port.Port类中有以下代码：
// default timeout
private long _timeout = 65000L;
private int _connectionMax = 512;//就是这行，查找resin所有源码后，发现没有对这个值进行设置
private int _minSpareConnection = 16;
private int _keepaliveMax = -1;
private int _minSpareListen = 5;
private int _maxSpareListen = 10;
将_connectionMax 改为 20480，然后重新编译并替换resin.jar中的Port类。
6. 重新启动Resin，再次运行TestURL进行测试，这次你会发现Threads Active 和 Total 一直变大，且可以超过512一直增大，在测试程序运行过程中刷新页面，页面响应性能还是不错的.
另，测试过程中Resin会打印出 1-3次 强制执行GC的信息，属于正常。
7.待测试完毕，Threads Active 和 Total 马上降为1.Idle为9，总内存为536.87Meg 空闲内存为480.33M
再经多次测试，结果一致，内存回收正常，表明当前 resin 稳定性和响应性可靠。
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