tomcat运行模式(bio,aio,apr)
tomcat中间件的启动运行模式有分为3种,可以在启动运行控制台和启动日志中看出.默认模式bio(阻塞IO)缺点:能非常低下,没有经过任何优化处理和支持,并发量高时,线程数较多,浪费资源.nio(异步IO)利用Java的异步IO处理,可以通过少量的线程处理大量的请求.apr(系统解决IO阻塞)从操作系统层面解决io阻塞问题,必须手动安装apr和native包.1.bio模式(默认)
# tailf../logs/catalina.out
May 13, 2016 3:23:17 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-82"]
May 13, 2016 3:23:17 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8010"]
May 13, 2016 3:23:17 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 4365 ms
2.nio模式
# vim server.xml
# tailf../logs/catalina.out
May 13, 2016 3:23:17 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-nio-82"]
May 13, 2016 3:23:17 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-nio-8010"]
May 13, 2016 3:23:17 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 4365 ms
3.apr模式
下载apr:http://mirrors.cnnic.cn/apache//apr/apr-1.5.2.tar.gz
下载apr-util:http://mirrors.cnnic.cn/apache//apr/apr-util-1.5.4.tar.gz
下载apr-iconv:http://mirrors.cnnic.cn/apache//apr/apr-iconv-1.2.1.tar.gz
# tar xvf apr-1.5.2.tar.gz
# tar xvf apr-util-1.5.4.tar.gz
# tar xvf apr-iconv-1.2.1.tar.gz
# cd apr-1.5.2
# ./configure --prefix=/usr/local/apr-1.5.2&& make && make install
# cd apr-iconv-1.2.1
# ./configure --prefix=/usr/local/apr-iconv-1.2.1 --with-apr=/usr/local/apr-1.5.2 && make && make install
# cd apr-util-1.5.4
# ./configure --prefix=/usr/local/apr-util-1.5.4--with-apr=/usr/local/apr-1.5.2--with-iconv=/usr/local/apr-iconv-1.2.1&& make && make install
# cd /usr/local/tomcat-7.0.67/bin/
# tar xvf tomcat-native.tar.gz
# cd tomcat-native-1.1.33-src/jni/native/
# ./configure --with-apr=/usr/local/apr-1.5.2 --with-java=/usr/local/jdk1.7.0_80
# make && make install
# vim /etc/profile
export LD_LIBRARY_PATH=/usr/local/apr-1.5.2/lib
# source /etc/profile
# tailf../logs/catalina.out
May 13, 2016 3:23:17 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-apr-82"]
May 13, 2016 3:23:17 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-apr-8010"]
May 13, 2016 3:23:17 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 4365 ms
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