CHEN Jian's Java Blog

概括自牛书《软件性能测试-段念》    对于交互式系统，为了模拟真实业务，应该设一个思考时间    对于非交互式系统，为了找出系统的最大吞吐量和可承受的最大压力，可以不设思考时间

基本可看的资料： http://www.ibm.com/developerworks/cn/opensource/os-lo-apache-tomcat/index.html http://www.javazy.com/contentex/200641293233.shtml 进一步调整： http://internet.blog.enorth.com.cn/article/252340.shtml http://tomcat.apache.org/connectors-doc/reference/workers.html 还有： http://www.iteye.com/topic/53610  用mod_proxy更好 http://neptune.iteye.com/blog/146591  window下apache配置

     文章开头讲了些有关集群的基本概念，非常的深入浅出 http://www.onjava.com/pub/a/onjava/2004/03/31/clustering.html

下面的结论没有什么普适性，只是针对我做的某个项目中的IBM PC SERVER和JAVA程序来说的：     经验发现： 服务器端采用多处理器，只能提高可承受的最大线程数，并不能提高事务的响应时间。响应时间主要取决于单个CPU的性能，如主频什么的。      

在录制需要登陆的系统时，我们把登陆部分放到 vuser_init 中，把登陆后的操作部分放 到 Action 中，把注销关闭登陆部分放到 vuser_end 中

以下是官方文档： Need for cooperation As stated in the Tomcat User’s Guide, Tomcat currently supports three modes of execution.  While it is entirely possible to have Tomcat serve both your static and dynamic document provision needs, there are several reasons why you might  not want want to do this.  With respect to the Apache web server, …

什么情况下才有必要用 httpd 整合 tomcat Read More »

Hardware. CPU(s), memory, network IO, and file IO Operating System. Symmetric multiprocessing (SMP) and thread support JVM. Version, tuning memory usage, and tuning garbage collection are important. Tomcat. Later releases are more optimized for performance. If you use JavaServer Pages, Jasper 2 available in Tomcat 4.1 significantly boosts performance. Application. Application design can have the …

优化基于tomcat的系统时，可以从哪些方面入手？ Read More »

Server load testing tools     Apache Jakarta JMeter     ab – Apache HTTP server benchmark tool     Many other free and commercial testing tools. Production     Apache 1.3/2.0 mod_jk (1.2)    Java Management Extensions (JMX)    Introscope – Application Server Monitoring