CICS subpools in the GCDSA

The subpools in the above-the-bar CICS® dynamic storage area (GCDSA) are listed, together with the use of each one.

Table 1. CICS subpools in the GCDSA
Subpool name Description
CPSM_64 Storage for CICSPlex SM API result sets in a System Management Single Server (SMSS) environment.
CQCQ_TR Storage for the console queue processing trace table.
CQCQ_XT Storage for the console queue transaction entry table.
DFHAPD64 A general subpool for 64-bit application domain storage.
DFHMPMDR Used for allocations of Managed Platform model rules (MPMODR) control blocks.
DFHMPPMB Used for allocations of Managed Platform policy modifier (MPPMB) control blocks.
DFHMPPRB Used for allocations of Managed Platform policy rule (MPPRB) control blocks.
DFHMPTAS Used for allocations of Managed Platform task lifetime storage (MPTAS) control blocks.
EP_64 Storage for control blocks for items in event capture queues, used in CICS event processing.
LD_APES Active Program Element (APE) control blocks for the loader domain.
LD_CPES Current Program Element (CPE) control blocks for the loader domain.
LD_CSECT CSECT list storage for the loader domain.
ML64GNRL Buffers for input and output for the z/OS® XML System Services (XMLSS) parser.
MN_ADCS Storage for association data control blocks.
MPSTAT Storage for control blocks for any static data capture items defined for a policy rule with an event action.
PGCSDB Storage for channel container segments, including segment headers.
PGPPTE64 Storage for application context data control blocks.
SMSHRC64 Used for many control blocks of SHARED_CICS64 class storage.
SOGNRL6 Storage for HTTPS data for the sockets domain.
TSDTN Temporary storage (TS) digital tree nodes.
TSMAIN Storage for main temporary storage.
TSMN0064 Fixed length elements for main temporary storage items that have lengths, including the header, less than or equal to 64 bytes. The header length is 8 bytes.
TSMN0128 128-byte fixed length elements for main temporary storage items.
TSMN0192 192-byte fixed length elements for main temporary storage items.
TSMN0256 256-byte fixed length elements for main temporary storage items.
TSMN0320 320-byte fixed length elements for main temporary storage items.
TSMN0384 384-byte fixed length elements for main temporary storage items.
TSMN0448 448-byte fixed length elements for main temporary storage items.
TSMN0512 512-byte fixed length elements for main temporary storage items.
TSMN0576 576-byte fixed length elements for main temporary storage items.
TSMN0640 640-byte fixed length elements for main temporary storage items.
TSMN0704 704-byte fixed length elements for main temporary storage items.
TSMN0768 768-byte fixed length elements for main temporary storage items.
TSMN0832 832-byte fixed length elements for main temporary storage items.
TSMN0896 896-byte fixed length elements for main temporary storage items.
TSMN0960 960-byte fixed length elements for main temporary storage items.
TSMN1024 1024-byte fixed length elements for main temporary storage items.
TSQUEUE TS queue descriptors.
TSTSI TS item descriptors.
WB64GNRL Storage for HTTP data for the Web domain (WB).
WU_64 Storage for CMCI retained results and metadata.
XMGEN64 A general subpool for 64-bit storage.