查看tomcat当前并发数

纸水仙

如何在WINDOW下配置TOMCAT APR：


APR是什么呢，（Tomcat can use the Apache Portable Runtime to provide superiorscalability, performance, and better integration with native server technologies. ）
Windows下的安装配置与使用
1、先去 http://tomcat.heanet.ie/native/ 下载编译好的 tcnative-1.dll 文件
2、把tcnative-1.dll文件放在Tomcat的bin目录下
然后启动TOMCAT，如果看到以下信息：
2008-8-31 17:28:59 org.apache.coyote.http11.Http11AprProtocol start
信息: Starting Coyote HTTP/1.1 on http-8080
2008-8-31 17:28:59 org.apache.coyote.ajp.AjpAprProtocol start］则配置成功

然后你可以用APACHE的AB命令测试下效果.
  ab -n 1000 -c 300 http://localhost:8080/turbine/index.jsp

相关APR的参数配置可以参考以下文档:
         http://tomcat.apache.org/tomcat-5.5-doc/apr.html




如何查看TOMCAT的并发访问量：
  我们进入TOMCAT服务管理页面（http://localhost:8080/manager/status）,可以看到下面这段文字
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  这个参数则代表当前TOMCAT的并发访问量



这是我TOMCAT服务器的配置:
<Connector port=&quot;8080&quot; maxHttpHeaderSize=&quot;8192&quot; pollerSize=&quot;10025&quot;
               maxThreads=&quot;1000&quot; minSpareThreads=&quot;25&quot; maxSpareThreads=&quot;75&quot;
               enableLookups=&quot;false&quot; redirectPort=&quot;8443&quot; acceptCount=&quot;100&quot;
      compression=&quot;on&quot; compressionMinSize=&quot;2048&quot;   
compressableMimeType=&quot;text/html,text/xml,text/javascript,text/css,text/plain&quot;  
               connectionTimeout=&quot;20000&quot; disableUploadTimeout=&quot;true&quot; sendfileSize=&quot;2048&quot; />


将TOMCAT日志更改为LOG4J日志输出
   把commons-logging.jar,log4j-1.2.13.jar的两个JAR拷贝到tomcat_home/common/lib下面.
  然后在将log4j.properties拷贝到tomcat_home/common/classes下面