Definicja enqueue server

Server that administers the lock table in a distributed SAP System.

The enqueue server (also known as the lock server) runs on the central instance. When an application running on an instance other than the central instance (possibly even on a different server) requests a lock, the lock request is sent through the local dispatcher to the message server and then to the dispatcher on the central instance. This dispatcher passes the request to the enqueue work process, which then looks in the lock table to determine whether this request conflicts with a lock that has already been set. If so, the request is denied; otherwise the lock is set.