Tomcat优化

曾经终败给现在 2021-12-05 03:17 280阅读 0赞

1.  优化Tomcat的JVM环境

vim /usr/local/apache-tomcat-9.0.16/bin/catalina.sh
    
    #在该注释后加入如下代码
    # OS specific support.  $var _must_ be set to either true or false.
    export JAVA_OPTS="-server -Xms512M -Xmx512M -Xss512k -XX:PermSize=128M 
     -XX:MaxPermSize=256M -XX:+AggressiveOpts -XX:+UseBiasedLocking -XX:+DisableExplicitGC -XX:MaxTenuringThreshold=8 -XX:+UseConcMarkSweepGC -XX:+UseParNewGC  -XX:+CMSParallelRemarkEnabled -XX:LargePageSizeInBytes=128m  -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -Djava.awt.headless=true"
    
    #-server 开启tomcat的服务器模式
    #-Xms 最小堆内存(JVM发现内存使用率达到最小内存的阀值时，会增加堆内存，直到最大内存为止，如果超出，则OutOfMemory Heap的错误 )
    #-Xmx 最大堆内存(JVM发现内存使用率低于最大内存的阀值时，会减少内存，直到最低内存位置。 为了防止JVM的这种申请或释放堆内存的机制，强烈建议将最小堆内存和最大堆内存设置成一样)
    #-AggressiveOpts 自动将新版本的优化配置生效
    #-XX:PermSize 永久代内存
    #-XX:MaxPermSize=256M 最大永久代内存

1.  优化Tomcat线程池

vim /usr/local/apache-tomcat-9.0.16/conf/server.xml
    
    #修改内容如下
    <?xml version="1.0" encoding="UTF-8"?>
    <Server port="8005" shutdown="SHUTDOWN">
      <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
      <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
      <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
      <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
      <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />
    
      <GlobalNamingResources>
        <Resource name="UserDatabase" auth="Container"
                  type="org.apache.catalina.UserDatabase"
                  description="User database that can be updated and saved"
                  factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
                  pathname="conf/tomcat-users.xml" />
      </GlobalNamingResources>
    
    
      <Service name="Catalina">
        <Connector port="9000" protocol="HTTP/1.1"
    			   URIEncoding="UTF-8"			  
                   maxHttpHeaderSize="8192"
    			   maxThreads="1200"
    			   enableLookups="false"
    			   acceptCount="200"
                   connectionTimeout="20000"
    			   disableUploadTimeout="true"
    			   compression="on"
    			   compressionMinSize="2048"
    			   compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain"
                   redirectPort="8443" />
       
        <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
    
        <Engine name="Catalina" defaultHost="localhost">
    
          <Realm className="org.apache.catalina.realm.LockOutRealm">   
            <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
                   resourceName="UserDatabase"/>
          </Realm>
    
          <Host name="localhost"  appBase="webapps"
                unpackWARs="true" autoDeploy="true">
            <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
                   prefix="localhost_access_log" suffix=".txt"
                   pattern="%h %l %u %t "%r" %s %b" />
          </Host>
        </Engine>
      </Service>
    </Server>

1.  开启Tomcat的apr模式

#安装apr和gcc
    yum -y install apr apr-devel
    yum -y install gcc
    
    #安装tomcat的native安装包
    cd /usr/local/apache-tomcat-9.0.21/bin/
    tar xzfv tomcat-native.tar.gz
    cd tomcat-native-1.2.21-src/native/
    ./configure --with-apr=/usr/bin/apr-1-config
    make
    make install

![1.png][]

#整合Tomcat的apr到环境上变量中
    vim /etc/profile
    
    #在文件中加入下面这句话
    export CATALINA_OPTS=-Djava.library.path=/usr/local/apr/lib
    
    #使配置生效
    source /etc/profile
    
    #修改tomcat的server.xml配置文件
    vim tomcat/conf/server.xml
    #将配置中的
    Connector port="8080" protocol="HTTP/1.1"
    改成
    Connector port="8080" protocol="org.apache.coyote.http11.Http11AprProtocol"
    
    将配置中的
    Connector port="8009" protocol="AJP/1.3" redirectPort="8443"
    改成
    Connector port="8009" protocol="org.apache.coyote.ajp.AjpAprProtocol" redirectPort="8443"

重启tomcat, 启动日志出现以下内容表示APR模式成功开启  
**INFO: Initializing ProtocolHandler \[“http-apr-8080”\]**  
**INFO: Initializing ProtocolHandler \[“apj-apr-8009”\]**

[1.png]: /images/20211205/db7059e3d3e84203ae557bdf9d3ad662.png