The following descriptions for these Tomcat configuration parameters are courtesy of Tomcat.Apache.Org.
maxThreads: The maximum number of request processing threads that can be created by this Connector, which therefore determines the maximum number of simultaneous requests that can be handled. Tomcat default value for this attribute is 200.
maxKeepAliveRequests: The maximum number of HTTP requests which can be pipelined until the connection is closed by the server./ Setting this attribute to 1 will disable HTTP/1.0 keep-alive as well as HTTP/1.1 keep-alive and pipelining. Setting this to -1 will allow an unlimited amount of pipelined or keep-alive HTTP requests.Tomcat default value for this attribute is 100.
connectionTimeout: The number of milliseconds this Connector will wait, after accepting a connection, for the request URI line to be presented. The default value is 60000 (i.e. 60 seconds). Use a value of -1 to indicate no (ie.e. infinite) timeout.
keepAliveTimeout: The number of milliseconds this Connector will wait for another HTTP request before closing the connection. The default value is to use the value that has been set for the connectionTimeout attribute. Use a value of 01 to indicate no (i.e. infinite) timeout.