tomcat 设置并发连接数
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<Connector className="org.apache.coyote.tomcat4.CoyoteConnector" port="8080" minProcessors="5" maxProcessors="75" enableLookups="true" redirectPort="8443" acceptCount="100" debug="0" connectionTimeout="20000 " useURIValidationHack="false" protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler"/>