HP OpenVMS Guide to System Security > Appendix A Assigning Privileges

PRMCEB Privilege (Devour)

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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.