Limiting Concurrent Requests with User Request Limits
There is an option on each App Server (HTTP , ODBC, XDBC, and WebDAV Server) configuration to limit the number of concurrent requests a user can have against that App Server. A concurrent request is a request against that App Server from the same user while another request from the same user is still active. Each App Server has a concurrent request limit configuration parameter. The default is 0, which means there is no limit to the number of concurrent requests. The value must be an integer greater than or equal to 0.
If you set the concurrent request limit configuration parameter to a value other than 0, it limits the number of concurrent requests any user can run against that App Server to the specified number. For example, if you set the number to 3, then any requests made by a user named raymond while 3 requests from raymond are running will fail with an exception.
When the limit is reached, the application will throw a 403 (forbidden) error with the XDMP-REQUESTLIMIT exception.