多核CPU服务器 tomcat配置

happy_boy

　　公司测试服务器是双核的windows server2008系统， tomcat服务器最多的时候，cpu利用率是50%，即只用了单核。如何配置server，让其充分利用cpu呢？

　　(1）修改jvm配置， 使用server模式。 jre里面有client和server两个文件夹，里面的jvm.dll不同。
　　(2)  修改tomcat connector 配置， 加大 “acceptorThreadCount” 数值。
　　参考文章：
　　http://www.coderanch.com/t/492062/Tomcat/Multi-CPU-configuration-webapplication-deployed
　　Make sure you use a modern VM (Java 1.6) because locking strategies improved dramatically over time.
http://java-monitor.com/forum/showthread.php?t=133
Also, start Tomcat using the -server flag.
http://java-monitor.com/forum/showthread.php?t=552
From there, use thread dumps to analyze what your code is doing. Go through them to reduce lock contention and make your code more suitable for multi-processor machines.
http://java-monitor.com/forum/showthread.php?t=317
http://java-monitor.com/forum/showthread.php?t=616
　　
　　http://tomcat.apache.org/tomcat-7.0-doc/config/http.html

acceptorThreadCount

The number of threads to be used to accept connections. Increase this value on a multi CPU machine, although you would never really need more than 2. Also, with a lot of non keep alive connections, you might want to increase this value as well. Default value is 1.

　　
　　http://forums.whirlpool.net.au/archive/971205
　　http://blog.iyunv.com/maoweiwer/article/details/6117099
　　http://phl.iteye.com/blog/857587
　　
JDK、JRE及JVM的关系总结
　　http://www.iyunv.com/apm70/archive/2012/06/05/2536804.html