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Tomcat优化配置

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server.xml测试

Connector->maxThreads，在64核下设置成200最优，设300或更高反而增加CPU切换时间大幅降低TPS。查资料默认值就是200，此参数不用设置。
Connector->minSpareThreads，设成200或直接用默认值25，没有区别
Connector->maxConnections,

server.xml

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<?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">

<!-- <Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
        maxThreads="1024" minSpareThreads="128"/> -->

<!-- <Connector executor="tomcatThreadPool"
           protocol="org.apache.coyote.http11.Http11Nio2Protocol"
           port="8080"
           maxConnections="40000"
           acceptCount="40000"
           enableLookups="false"
           disableUploadTimeout="true"
           useSendfile="true"
           connectionTimeout="60000"
           redirectPort="8443"
           URIEncoding="UTF-8"
           compression="on"
           compressionMinSize="1024"
           compressibleMimeType="text/html,text/xml,text/plain,text/css,text/javascript,application/javascript"
           /> -->
  <Connector port="8080" protocol="HTTP/1.1"
            connectionTimeout="20000" 
            maxConnections="20000"
            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>