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The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path

2011-02-22 12:06:44| 分类： java | 标签： |举报 |字号大中小订阅

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在eclipse中，启动tomcat时会出现如此信息：The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path，它其实不影响程序的正常运行，但看到了，感觉实在别扭。其解决办法如下：

http://tomcat.heanet.ie/native/ 下载tcnative-1.dll，然后放到你的JDK路径下的bin目录下。重新启动tomcat，就没有问题了。

这个tcnative-1.dll 他的作用如下：

tomcat整合本地apr会使效率提升：
一是，处理静态资源的时候速度更快，（注：有人用jmeter，对使用apr前后的tomcat进行压力测试，结果显示，性能是有一定的提升，但是没有想象中多，只有一点点，当然，这与运行的逻辑有关，但是我个人认为在大多数情况下这部分性能提升甚微）。
二是，我认为提升比较多的是对ssl的处理效率，当tomcat处理https的请求是，如果使用本地的openssl库，肯定会比前面提升的效率高。（虽然没有实际测试数据，但我推测这里的性能提升比例上要比第一点多得多）。

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