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Coupling facility selection parameters for IMS structures

NOTICE

IBM intends to sunset the CFSizer web application in 4Q26. Its function has been incorporated into the z/OSMF Sysplex Management service’s CFRM Policy Editor beginning at z/OS V2R5, and as part of that platform the sizing function is both formally supported and more robust. IBM recommends that all CFSizer users transition to using z/OSMF for workload-based structure sizing. A discussion of the z/OSMF structure sizing support as well as documentation can be found at the following links:

Note: The sunset of the CFSizer web application will not impact the availability of the SIZER utility.

To size one or more IMS coupling facility structures, click the product checkbox and provide the requested input data. Default values have been provided for all the input data fields. These are recommended default values from IBM product groups that may or may not be reflective of your environment. Modify the defaults as appropriate and then click Submit button below to size this structure.

Total buffers	Cache buffers	Average cache data size
IMS OSAM structure
IMS OSAM structure help

Total buffers
IMS VSAM structure
IMS VSAM structure help

Number of locks held	Max number of users	Max number of connectors	Asynchronous Duplexing
IMS IRLM LOCK structure
IMS IRLM LOCK structure help

Short msg high water mark	Long msg high water mark	SHMSG LRECL	LGMSG LRECL
IMS SMQ LIST structure
IMS SMQ LIST structure help

EMH message number	Data element number
IMS EMH LIST structure
IMS EMH LIST structure help

UOW from DBDGEN area	Root from DBDGEN area	Size from DBDGEN area
IMS VSO CACHE structure
IMS VSO CACHE structure help

This structure will always return 50MB (51200K)
IMS CQS Log structure
IMS CQS Log structure help

Input Type	Resource number	Number of Data Elements	Element Ratio
IMS Resource structure
IMS Resource structure help

Operation managers per log stream	Writes per second	Low offload	High offload
IMS Operations Manager Audit structure
IMS Operations Manager Audit structure help

[{"Product":{"code":"SWG90","label":"z\/OS"},"Business Unit":{"code":"BU070","label":"IBM Infrastructure"},"Component":"CFSizer","Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"Not Applicable","Edition":"","Line of Business":{"code":"LOB56","label":"Z HW"}}]

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