RACF virtual storage requirements

This table summarizes which functions give control to specified RACF® exit routines.

Figure 1 is a storage map for RACF. Table 1 gives virtual storage requirements for RACF.

Figure 1. RACF storage use

Table 1. RACF estimated storage usage
Storage subpool	Usage	How to estimate size
FLPA	RACF service routines, if IMS™ or CICS® is using RACF for authorization checking	47,000
FLPA	RACROUTE REQUEST=FASTAUTH and ICHRTX00 exits	Measure by using AMBLIST
PLPA	RACF installation exits that are AMODE(24) or AMODE(ANY)	Measure by using AMBLIST
	RACF RMODE(24) code	750
	RACF service routines, if IMS or CICS is not using RACF for authorization checking, unless explicitly removed from SYS1.LPALIB and placed elsewhere for use in FLPA	47,000
	RACROUTE REQUEST=FASTAUTH and ICHRTX00 exits	Measure by using AMBLIST
	RACF range table	4 + (number_of_ranges × 45)
EPLPA	RACF installation exits that are AMODE(31)	Measure by using AMBLIST
EPLPA	RACF resident modules above 16MB	875,000
SQA	RACF communications vector table and extension	2800
SQA	Class descriptor table (CNST)	7500 + 58 × number_of_static_installation-defined_classes
ESQA	RACF data sharing control area	300 (when enabled for sysplex communication)
	RACF token table	2408 bytes (when enabled for sysplex communication)
	Class descriptor table (CNSX)	(number_of_classes_IBM_supplies × 28) + (number_of_static_installation-defined_classes × 58) + 26 For z/OS® V2R1, IBM® supplies 233 classes, so the size of the CNSX is 6550 + (number_of_static_installation-defined_classes × 58). If you install a PTF that adds classes, you must recalculate this number.
	RACF identity cache communication vector (RCVI)	6880
LSQA	ACEE and related storage Note: Applications can place this storage in a different subpool. Applications can create multiple ACEEs in this and other storage subpools.	400 + installation_data_length + terminal_installation_data_length+ application_installation_data + (52 for every 78 temporary data sets, rounded up to the next multiple of 52) If the address space was dubbed a z/OS UNIX process, add: 52 + (number_of_connected_groups_with_GIDs × 4) Add 112 bytes if the user has CLAUTH for a class with a POSIT value over 127. If the user is identified by an identity context reference, add: 40 + length_of_authenticated_user_name + length_of_registry_name + length_of_host_name + length_of_authentication_mechanism_OID. The maximum value of the sum is 949.
ELSQA	Connect group table	64 + (48 × number_of_groups_connected)
	RACF storage tracking table	3500
	RACROUTE REQUEST=LIST profiles Note: Applications can place these profiles in a different storage subpool.	2108 + (number_of_profiles_in_class × 16) + (number_of_unique_generic_profile_prefix_lengths × 24) + (number_of_generic_profiles × 4) + (number_of_resident_profiles × (10 + average_profile_size + (1.5 × class_max_profile_name_size))) for each class if GLOBAL=YES is not specified
CSA	RACF database control structures (DCB, DEB, templates)	4600 + (number_of_BAM_blocks × 6) + (364 x number_of_RACF_primary_data_sets)
CSA	RACF subsystem control blocks	3500
ECSA	RACF data set descriptor table and extension	168 + (896 × number_of_RACF_primary_data_sets)
	RACF ICB (non-shared DB)	4096 per RACF database if the database is not shared and is not on a device marked as shared, 0 otherwise
	RACF global access tables	27,640 + 2 × (18 + number_of_entries × (6 + (1.5 × max_profile_name_size)))
	RACF program control table	28 + (number_of_program_profiles × average_program_profile_size) + (number_of_controlled_libraries × 50) To find the average_program_profile_size, use the following formula: 54 + (average_number_of_access _entries × 9) + (average_number_of _conditional_access_entries × 17) + (average_number_of_libraries × 52)
	RACF resident data blocks	For each primary data set: 3248 + (4136 × number_of_database_buffers) If you are using sysplex communication, for each backup data set add: 3248 + (4136 × number_of_database_buffers × 2)
	Dynamic parse tables	92,835 + (number_of_custom_field_definitions x 500)
	SETROPTS GENLIST profiles	52 + (number_of_profiles_in_class × 16) + (number_of_resident_profiles × (10 + average_profile_size + (1.5 × class_max_profile_name_size)))
	Alias-related template extension	1296
	RACF program verification module (IRRPVERS)	500,000
User private below 16MB	RACF transient storage	122 bytes while a RACF service is running
User private above 2G	Generic profile memory objects	Minimum of 2 MB for each generic profile list in use for the address space Note: Large profile lists (containing thousands of profiles) might require 3 MB or more each. This storage is not subject to the MEMLIMIT of the job and does not reduce the amount of storage available for the user's use.