Storage Pools

A storage pool is an area of storage in the DC/UCF region/partition from which the system and programs executing under the system acquire space for work areas and control blocks. Typically, storage pools hold:

Program variable storage
COBOL working storage
Variable portions of CA ADS dialogs
Variable portions of subschema tables and access modules
Currency blocks
Database lock tables
Buffer pools (if IDMS storage is specified on the DMCL BUFFER statement or through the DCMT VARY BUFFER command)
Secondary allocations of null PDEs
User trace buffers

256 Storage Pools is the Maximum

A DC/UCF system can include up to 256 storage pools. Each pool is identified by a unique number. The following table describes the storage pools that you can define.

Pool Id	Characteristics
Storage pool 0	Primary storage pool Mandatory for each DC/UCF system Located in 24-bit address space Defined by the STORAGE POOL parameter of the system generation SYSTEM statement
Storage pools 1 through 127	Secondary storage pools Optional Located in 24-bit address space Defined by the system generation STORAGE POOL statement
Storage pools 128 through 254	Secondary storage pools Optional (only for operating systems that support 31-bit addressing) Located in 31-bit address space Defined by the system generation XA STORAGE POOL statement
Storage pool 255	Secondary storage pool Located in 31-bit address space Defined by the XA STORAGE POOL parameter of the SYSTEM statement