关于Tomcat配置文件，调优，jmx配置，以及manager应用 学习记录

1、Tomcat配置文件 conf/server.xml

---

<?xml version='1.0' encoding='utf-8'?>

<!--
  Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file distributed with this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.  You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.See the License for the specific language governing permissions and  limitations under the License.
-->
<!-- Note:  A "Server" is not itself a "Container", so you may not
     define subcomponents such as "Valves" at this level.  Documentation at /docs/config/server.html
 -->

<Server port="8005" shutdown="SHUTDOWN">
   <!-- 负责监听  关闭Tomcat的请求的端口，关闭指令是SHUTDOWN -->
  <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
  <!-- Security listener. Documentation at /docs/config/listeners.html
  <Listener className="org.apache.catalina.security.SecurityListener" />
  -->
  <!--APR library loader. Documentation at /docs/apr.html -->
  <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
  <!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html -->
  <Listener className="org.apache.catalina.core.JasperListener" />
  <!-- Prevent memory leaks due to use of particular java/javax APIs-->
  <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
  <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />

  <!--Listener这些是tomcat的一些监听配置，详情可以查看绿色备注的网址>

  <!-- Global JNDI resources
       Documentation at /docs/jndi-resources-howto.html
  -->
  <GlobalNamingResources>
    <!-- Editable user database that can also be used by
         UserDatabaseRealm to authenticate users
    -->
    <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>

  <!-- A "Service" is a collection of one or more "Connectors" that share
       a single "Container" Note:  A "Service" is not itself a "Container",
       so you may not define subcomponents such as "Valves" at this level.
       Documentation at /docs/config/service.html
   -->
  <Service name="Catalina">

    <!--The connectors can use a shared executor, you can define one or more named thread pools-->
    <!--
    <Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
        maxThreads="150" minSpareThreads="4"/>
    -->

    <!-- A "Connector" represents an endpoint by which requests are received
         and responses are returned. Documentation at :
         Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)
         Java AJP  Connector: /docs/config/ajp.html
         APR (HTTP/AJP) Connector: /docs/apr.html
         Define a non-SSL HTTP/1.1 Connector on port 8080
    -->
    <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />

  <!--

• port 是tomcat 对外的端口号，只有向此端口号发送请求才能进入到本tomcat中； 
• redirectPort  作为服务器正在处理http请求时收到了一个SSL传输请求后重定向的端口号
• connectionTimeout:等待超时的时间数（以毫秒为单位）。
• 这里还有一些其他的配置，如果需要的话可以加上
• maxThreads:设定在监听端口的线程的最大数目,这个值也决定了服务器可以同时响应客户请求的最大数目.默认值为200
• protocol:必须设定为AJP/1.3协议。
• address:如果服务器有两个以上IP地址,该属性可以设定端口监听的IP地址,默认情况下,端口会监听服务器上所有IP地址。
•  minProcessors:服务器启动时创建的处理请求的线程数，每个请求由一个线程负责。 
• maxProcessors:最多可以创建的处理请求的线程数。
•  minSpareThreads:最小备用线程 。 
• maxSpareThreads:最大备用线程。 
• debug:日志等级。
• disableUploadTimeout:禁用上传超时,主要用于大数据上传时。

>
    <!-- A "Connector" using the shared thread pool-->
    <!--
    <Connector executor="tomcatThreadPool"
               port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
    -->
    <!-- Define a SSL HTTP/1.1 Connector on port 8443
         This connector uses the BIO implementation that requires the JSSE
         style configuration. When using the APR/native implementation, the
         OpenSSL style configuration is required as described in the APR/native
         documentation -->
    <!--
    <Connector port="8443" protocol="org.apache.coyote.http11.Http11Protocol"
               maxThreads="150" SSLEnabled="true" scheme="https" secure="true"
               clientAuth="false" sslProtocol="TLS" />
    -->

    <!-- Define an AJP 1.3 Connector on port 8009 -->
    <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

    <!-- 负责和其他HTTP服务器建立连接。在把Tomcat与其他HTTP服务器集成时就需要用到这个连接器。 -->

    <!-- An Engine represents the entry point (within Catalina) that processes
         every request.  The Engine implementation for Tomcat stand alone
         analyzes the HTTP headers included with the request, and passes them
         on to the appropriate Host (virtual host).
         Documentation at /docs/config/engine.html -->

    <!-- You should set jvmRoute to support load-balancing via AJP ie :
    <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">
    -->
    <Engine name="Catalina" defaultHost="localhost">

      <!--For clustering, please take a look at documentation at:
          /docs/cluster-howto.html  (simple how to)
          /docs/config/cluster.html (reference documentation) -->
      <!--
      <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
      -->

      <!-- Use the LockOutRealm to prevent attempts to guess user passwords
           via a brute-force attack -->
      <Realm className="org.apache.catalina.realm.LockOutRealm">
        <!-- This Realm uses the UserDatabase configured in the global JNDI
             resources under the key "UserDatabase".  Any edits
             that are performed against this UserDatabase are immediately
             available for use by the Realm.  -->
        <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
               resourceName="UserDatabase"/>
      </Realm>

      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">

         <!--

• name:在此例中一直被强调为$CATALINA_HOME/config/Catalina/localhost中的localhost虚拟主机名
• debug:是日志的调试等级
• appBase:默认的应用路径,也就是把应用放在一个目录下,并在autoDeploy为true的情况下,可自动部署应用此路径相对于$CATALINA_HOME/ (web applications的基本目录)
• unpackWARs:设置为true,在Web应用为*.war是,解压此WAR文件. 如果为true,则tomcat会自动将WAR文件解压;否则不解压,直接从WAR文件中运行应用程序.
• autoDeploy:默认为true,表示如果有新的WEB应用放入appBase 并且Tomcat在运行的情况下,自动载入应用 -->
• https://tomcat.apache.org/tomcat-7.0-doc/config/http.html   更多参数请参考这两个网址
• https://tomcat.apache.org/tomcat-7.0-doc/config/ajp.html    更多参数请参考这两个网址

        <!-- SingleSignOn valve, share authentication between web applications
             Documentation at: /docs/config/valve.html -->
        <!--
        <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
        -->

        <!-- Access log processes all example.
             Documentation at: /docs/config/valve.html
             Note: The pattern used is equivalent to using pattern="common" -->
        <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>
 

---

2、内存参数调优

    Tomcat内存优化主要是对 tomcat 启动参数优化，我们可以在 tomcat 的启动脚本 catalina.sh 中设置 java_OPTS 参数。 

• -server：启用jdk的server版本。
•  -Xms：虚拟机初始化时的最小堆内存。
•  -Xmx：虚拟机可使用的最大堆内存。 #-Xms与-Xmx设成一样的值，避免JVM因为频繁的GC导致性能大起大落
•  -XX:PermSize：设置非堆内存初始值,默认是物理内存的1/64。
•  -XX:MaxNewSize：新生代占整个堆内存的最大值。
•  -XX:MaxPermSize：Perm（俗称方法区）占整个堆内存的最大值，也称内存最大永久保留区域。

       初始配置是：

       JAVA_OPTS="-Xms600m -Xmx1024m -XX:MaxPermSize=200m" 

　　我修改后的配置是

　　JAVA_OPTS="-Xms1024m -Xmx2048m -XX: PermSize=256M -XX:MaxNewSize=256m -XX:MaxPermSize=256m"

　　配置完成后可重启Tomcat 。 

  较全的其他优化（缓存，安全，内存，系统，并发，网络）-------------http://blog.51cto.com/8248183/2062343

3、jmx配置

      看到有篇文章写的还挺简单易懂的，所以懒一下直接摘抄了哈，文章地址--------https://blog.youkuaiyun.com/dongdong2980/article/details/78476393

4、manager应用

     在conf/tomcat-user.xml文件中加入

       <role rolename="manager-status"/> 

       <user username="admin" password="nishuoshishajiushisha" roles="manager-gui,manager-script,manager-jmx,manager-status"/>

      然后在http://tomcatIP:tomcatPORT/manager/html 中使用刚才的用户名和密码进行登录即可进入manager应用界面

     manager页面操作正在学习ing！

    帮助文档可以查看 http://tomcatIP:tomcatPORT/docs/html-manager-howto.html