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IXCH0259E
The sum of coupling facility storage-class memory (SCM) eligible to be assigned to allocated structures in a coupling facility exceeds the total storage-class memory defined to a coupling facility.

Explanation

CHECK(IBMXCF,XCF_CF_STR_MAXSCM) found an exception.

A check exception is raised when the sum of the maximum storage-class memory (SCM) for allocated structures exceeds the actual total storage-class memory available to a coupling facility.

Maximum SCM for a structure is the maximum amount of SCM that a coupling facility will allow a structure to use, if needed. SCM for a structure is not pre-assigned, but instead allocated when structure data needs to be migrated to SCM.

A check exception for a coupling facility indicates that the coupling facility's SCM usage allowance for structures exceeds its actual available SCM.

Message IXCH0927I in the message buffer lists coupling facilities in use by the local system that are "over committed" in their maximum storage-class memory assignments to allocated structures.

System action

The system continues processing.

Operator response

Report this problem to the system programmer.

System programmer response

Determine if too many structures using SCM are mapped to the coupling facility. An over commitment of SCM to structures may result in not enough coupling facility SCM to satisfy structure data migration requests. Inability to migrate structure data can result in structure unavailability conditions.

Problem determination

N/A

Source

Cross System Coupling Facility (SCXCF)

Module

IXCHCSTR

Routing code

See Note 35.

Descriptor code

3 is the default set by this check. See Note 1.

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