该优化针对Linux X86_X64环境
1. Tomcat优化其实就是对server.xml优化（开户线程池，调整http connector参数）
搜索【<Executor name="tomcatThreadPool"】，开启并调整为 <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" maxThreads="1000" maxIdleTime="60000" minSpareThreads="20"/> 搜索【port="8080"】，调整为 <Connector executor=" tomcatThreadPool" port="8080" //开启线程池 protocol="org.apache.coyote.http11. Http11AprProtocol" //开启Apr协议，需要安装Apr支持 maxHttpHeaderSize="8192" maxThreads="1000" processorCache="1000" acceptCount="1000" minSpareThreads="100" acceptorThreadCount="8" URIEncoding="UTF-8" enableLookups="false" redirectPort="8443" //关闭反向查询 connectionTimeout="120000" keepAliveTimeout="120000" maxKeepAliveRequests="65535" disableUploadTimeout="true" compression="on" compressionMinSize="4096" //开启静态文件压缩 noCompressionUserAgents="gozilla, traviata" //开启静态文件压缩 compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain,application/json,application/x-javascript " //开启静态文件压缩 />
2. 对catalina.sh优化JVM
打开 Tomcat路径\bin\ catalina.sh，在最顶部加入,红色部分请根据实际情况调整 JAVA_OPTS="-server -showversion -Xms12g -Xmx12g -XX:PermSize=256m -XX:MaxPermSize=256m" JAVA_OPTS="$JAVA_OPTS -d64 -XX:CICompilerCount=8 -XX:+UseCompressedOops" JAVA_OPTS="$JAVA_OPTS -XX:SurvivorRatio=4 -XX:TargetSurvivorRatio=90" JAVA_OPTS="$JAVA_OPTS -XX:ReservedCodeCacheSize=256m -XX:-UseAdaptiveSizePolicy" JAVA_OPTS="$JAVA_OPTS -Duser.timezone=Asia/Shanghai -XX:-DontCompileHugeMethods" JAVA_OPTS="$JAVA_OPTS -Xss256k -XX:+AggressiveOpts -XX:+UseBiasedLocking" JAVA_OPTS="$JAVA_OPTS -XX:MaxTenuringThreshold=31 -XX:+CMSParallelRemarkEnabled " JAVA_OPTS="$JAVA_OPTS -XX:+UseCMSCompactAtFullCollection -XX:LargePageSizeInBytes=256m -XX:+UseFastAccessorMethods" JAVA_OPTS="$JAVA_OPTS -XX:+UseCMSInitiatingOccupancyOnly -Djava.awt.headless=true" JAVA_OPTS="$JAVA_OPTS -XX:+UseGCOverheadLimit -XX:AllocatePrefetchDistance=256 -XX:AllocatePrefetchStyle=1" JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:MaxGCPauseMillis=200" 【注意】 1.-Xms=-Xmx=服务器内存*70%,如部署tomcat,jboss在同一台服务器-Xms=-Xmx=服务器内存*80%*1/4
2. 添加的参数建议要自己明白是什么意思，可以参考JVM参数列表
转载于:https://www.cnblogs.com/yanduanduan/p/5344407.html
