There are several XCF and XES services that you can use to monitor performance and system utilization. The major differences among IXCMG, IXCQUERY, and IXLMG with regard to coupling facility resources are reviewed here.

• Use IXCMG to gather information about the XCF resources in use by the system on which IXCMG is invoked. You can collect detailed information about XCF signaling paths and/or messages pending delivery, as well as summary information about message traffic between systems in the sysplex, and/or message traffic between XCF group members.

  If you are using coupling facility structures for XCF signaling, then IXCMG will return information about XCF's use of those structures for signaling.

• Use IXCQUERY to receive general or detailed information about coupling facilities and/or coupling facility structures defined in the active CFRM policy. The coupling facility information includes that which you would find in the CFRM policy, such as coupling facility identifier, size of the dump space, the number of systems connected along with each system's identifier, and structure names and structure allocation status. Similarly, structure information includes that which you would find in the structure definition section of a CFRM policy, having to do with structure name, size, and preference and exclusion lists.
• Use IXLMG to gather system-related information, such as configuration data, usage statistics, and subchannel utilization and coupling facility-related information, such as coupling facility structure limits, structure controls, cast-out class data, and storage class data.