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97 lines
3.1 KiB
Markdown
97 lines
3.1 KiB
Markdown
### 秒杀tomcat优化
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有问题或者宝贵意见联系我的QQ,非常希望你的加入！
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##要求：
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> 本文以tomcat8.5.20为准
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>目标
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1.内存优化
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2.并发优化
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3.APR优化
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#### [APR优化相关包](/docs/tools)
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1.**内存优化**
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内存优化catalina
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JAVA_OPTS="-server -Xms2048M -Xmx2048M -XX:+HeapDumpOnOutOfMemoryError
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-XX:HeapDumpPath=$CATALINA_HOME/logs/heap.dump"
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# Register custom URL handlers
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server.xml 配置
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maxConnections="300"
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acceptCount="200"
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maxThreads="400"
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minSpareThreads="200"/>
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禁用
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<!-- Define an AJP 1.3 Connector on port 8009
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<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />-->
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${tomcat}/webapps/docs/config/host.html
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autoDeploy：This flag value indicates if Tomcat should check periodically for new or updated web applications while Tomcat is running
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${tomcat}/webapps/docs/config/http.html
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enableLookups：false
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${tomcat}/webapps/docs/config/context.html:
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reloadable：false
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2.**如果你的网站具有高并发那么建议使用APR模式**
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http://apr.apache.org/
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依赖：
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>>APR 1.2+ development headers (libapr1-dev package)
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>>OpenSSL 1.0.2+ development headers (libssl-dev package)
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>>JNI headers from Java compatible JDK 1.4+
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>>GNU development environment (gcc, make)
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yum install apr* openssl-devel gcc make
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tar zxvf apr-1.4.5.tar
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cd apr-1.4.5
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./configure --prefix=/usr/local/apr
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make
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make install
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tar -zxvf apr-iconv-1.2.1.tar.gz
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cd apr-iconv-1.2.1
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./configure --prefix=/usr/local/apr-iconv --with-apr=/usr/local/apr
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make
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make install
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yum install expat-devel
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tar zxvf apr-util-1.3.12.tar.gz
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cd apr-util-1.3.12
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./configure --prefix=/usr/local/apr-util --with-apr=/usr/local/apr
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make
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make install
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安装openssl 1.0.2
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./config --prefix=/usr/local/openssl
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修改Makefile：
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vi Makefile
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将原来的：CFLAG= -DOPENSSL_THREADS
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修改为： CFLAG= -fPIC -DOPENSSL_THREADS
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也就是添加-fPIC
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执行执行：
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make && make install
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cd bin
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tar -zxvf tomcat-native.tar.gz
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cd tomcat-native-1.2.12-src
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cd native
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./configure --with-apr=/usr/local/apr --with-ssl=/usr/local/openssl
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make
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make install
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catalina.sh：
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JAVA_OPTS="$JAVA_OPTS -Djava.library.path=/usr/local/apr/lib
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注意：开启了apr之后，jvm用到的native内存会增大，因此要适当调大Metaspace空间,添加JVM选项：-XX:MetaspaceSize=128m
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JAVA_OPTS="-server -Xms2048M -Xmx2048M -XX:MetaspaceSize=128M -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=$CATALINA_HOME/logs/heap.dump"
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server.xml：
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<Connector port="8080" protocol="org.apache.coyote.http11.Http11AprProtocol"
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connectionTimeout="20000"
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redirectPort="8443" />
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<Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="off" /> |