When a persistent connection is established, the client is able to place multiple requests on a single connection. You use the MaxKeepAliveRequests directive to specify the number of requests that should be allowed per connection. By default, the value specified for this directive is 100, which means that for each persistent connection, a client can send 100 requests to the Web server.
It is possible to set a value of 0 for the MaxKeepAliveRequests directive. However, doing so will mean that you are allowing an unlimited number of requests per connection. This is not advisable from performance and security points of view. An unlimited number of requests on a single connection can result in poor performance of the Web server. In addition, individuals with malicious intent could exploit it. So, it is best to keep the default value for this directive.