The PRMCEB privilege lets the user's process create or delete
a permanent common event flag cluster by executing the Associate
Common Event Flag Cluster ($ASCEFC) or the Delete Common Event Flag
Cluster ($DLCEFC) system service. Common event flag clusters enable
cooperating processes to communicate with each other and thus synchronize
their execution.
Grant this privilege with care. If permanent common event
flag clusters are not explicitly deleted, they tie up space in system
dynamic memory, which may degrade system performance.