轉:tomcat下查看並發流量

http://wangxuliangboy.javaeye.com/blog/235081

如何在WINDOW下配置TOMCAT APR：

 

APR是什麼呢，（Tomcat can use the Apache Portable Runtime to provide superior scalability, performance, and better integration with native server technologies. ）

Windows下的安裝配置與使用
1、先去 http://tomcat.heanet.ie/native/ 下載編譯好的 tcnative-1.DLL 檔案

2、把tcnative-1.dll檔案放在Tomcat的bin目錄下

然後啟動TOMCAT，如果看到以下資訊：

2008-8-31 17:28:59 org.apache.coyote.http11.Http11AprProtocol start
資訊: Starting Coyote HTTP/1.1 on http-8080
2008-8-31 17:28:59 org.apache.coyote.ajp.AjpAprProtocol start］則配置成功

 

然後你可以用APACHE的AB命令測試下效果.

  ab -n 1000 -c 300 http://localhost:8080/turbine/index.jsp

 

相關APR的參數配置可以參考以下文檔:

         http://tomcat.apache.org/tomcat-5.5-doc/apr.html

 

 

 

 

如何查看TOMCAT的並發訪問量：

  我們進入TOMCAT服務管理頁面（http://localhost:8080/manager/status）,可以看到下面這段文字

http-8080

Max threads: 1000 Min spare threads: 0 Max spare threads: 0 Current thread count: 303 Current thread busy: 234 Keeped alive sockets count: 0
Max processing time: 23531 ms Processing time: 29287.717 s Request count: 2980 Error count: 0 Bytes received: 0.00 MB Bytes sent: 12.61 MB

 

Current thread count: 303  這個參數則代表當前TOMCAT的並發訪問量

 

 

 

這是我TOMCAT伺服器的配置:

 <Connector port="8080" maxHttpHeaderSize="8192" pollerSize="10025"
               maxThreads="1000" minSpareThreads="25" maxSpareThreads="75"
               enableLookups="false" redirectPort="8443" acceptCount="100"
      compression="on" compressionMinSize="2048"   
compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain" 
               connectionTimeout="20000" disableUploadTimeout="true" sendfileSize="2048" />

 

 

將TOMCAT日誌更改為LOG4J日誌輸出

   把commons-logging.jar,log4j-1.2.13.jar的兩個JAR拷貝到tomcat_home/common/lib下面.

  然後在將log4j.properties拷貝到tomcat_home/common/classes下面