Resin 3 pro高并发 – 飛奔嘅蝸牛

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。

出自 JAVA开发者(http://www.chinajavaworld.com)

Tag: Resin 3 pro高并发

Resin 3 pro高并发,响应性与稳定性方案