If a system partitioned out of the sysplex was managing one or more locks for one or more coupling facility lock structures, then XES must transfer that management to remaining sysplex peer systems during post-partition cleanup. During this transition, XES will quiesce all activity to the associated lock structures in order to preserve data integrity. This delay may impact subsystems that use these coupling facility lock structures. The ISGLOCK structure used by a Global Resource Serialization Star complex is an example of this, temporarily preventing the processing of SCOPE=SYSTEMS resources. Other coupling facility lock structure users inlcude IRLM/DB2, VSAM RLS, and IRLM/IMS.