nginx + tomcat 8.5 优化配置

第一步: Tomcat优化:
进入文件夹tomcat/bin. 打开catalina.sh文件，
找到下面的注释

# OS specific support.  $var _must_ be set to either true or false.
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在该注释后添加如下代码：

# OS specific support.  $var _must_ be set to either true or false.

export JAVA_OPTS="-server -Xms512M -Xmx1400M -Xss512k -XX:+AggressiveOpts -XX:+UseBiasedLocking -XX:+DisableExplicitGC -XX:MaxTenuringThreshold=15 -XX:+UseConcMarkSweepGC -XX:+UseParNewGC  -XX:+CMSParallelRemarkEnabled -XX:LargePageSizeInBytes=128m  -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -Djava.awt.headless=true"
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在tomcat/conf下打开logging.properties文件，在最后一行加入:

org.apache.jasper.servlet.TldScanner.level = FINE
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进入文件夹tomcat/conf下打开server.xml文件，修改代码如下：

<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="9001" 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 &quot;%r&quot; %s %b" />
      </Host>
    </Engine>
  </Service>
</Server>
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第二步. 打开nginx/conf.打开对应的conf配置文件。修改代码如下：

worker_processes                  4;
worker_rlimit_nofile              102400;

events {
    use epoll;
    worker_connections            65535;
    multi_accept                  on;
}


http {
    server_tokens                 off;
    open_file_cache               max=102400 inactive=20s;
    open_file_cache_valid         30s;
    open_file_cache_min_uses      1;
    reset_timedout_connection     on;

    gzip                          on;
    gzip_min_length               2k;
    gzip_buffers                  4 32k;
    gzip_http_version             1.1;
    gzip_comp_level               6;
    gzip_types                    text/plain text/javascript text/xml text/css application/json application/javascript application/x-javascript application/xml;
    gzip_disable                  "MSIE [1-6]\."
    gzip_vary                     on;
    gzip_proxied                  any;

    tcp_nopush                    on;
    tcp_nodelay                   on;

    include                       mime.types;
    default_type                  application/octet-stream;
    sendfile                      on;

    keepalive_timeout             16;

    proxy_connect_timeout         8s;
    proxy_send_timeout            8s;
    proxy_read_timeout            8s;
    send_timeout                  3s;

    upstream {name} {
               server {ip}:{port} max_fails=5 fail_timeout=30s weight=1;
               ...
    }

    server {
        listen       80;
        server_name  localhost;
        proxy_set_header   X-Real-IP   $remote_addr;

        location / {
            proxy_pass http://{name};
        }
    }
}

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第三部，开启tomcat的apr模式
(1) 安装apr

yum -y install apr apr-devel
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(2) 安装native

#进入tomcat下的bin目录
cd /usr/local/tomcat/bin/
tar xzfv tomcat-native.tar.gz
cd tomcat-native-1.1.33-src/native/
./configure --with-apr=/usr/bin/apr-1-config
make
make install
# 如果需要安装gcc
# yum -y install gcc
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安装完后会提示：

(3) 整合Tomcat apr
在/etc/profile中加入环境变量

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
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