DSNB610I   csect-name MAXIMUM ALLOCATABLE BUFFER POOL STORAGE OF int1MB HAS BEEN REACHED. UNABLE TO CREATE/EXPAND BUFFER POOL bp-name TO SPECIFIED SIZE int2. BUFFER POOL IS NOW int3

Explanation

A buffer pool could not be created or expanded to the requested size. The maximum amount of allowable buffer pool storage, indicated by int1, has been reached. The maximum allowable buffer pool storage is calculated to be twice the amount of real storage that is available on the z/OS® image, or 1TB, whichever is less.
bpname
Indicates the name of the buffer pool that was affected.
int2
Indicates the size of the buffer pool that was requested.
int3
Indicates the actual size of the buffer pool that was created/expanded.

System action

The buffer pool is created or expanded to the size allowed by the available storage within the maximum. If the maximum has already been reached, then the buffer pool is allocated at a minimum size as follows:
  • 2,000 pages for 4K page size
  • 1,000 pages for 8K page size
  • 500 pages for 16K page size
  • 250 pages for 32K page size

Once the maximum has been reached, buffer pool sizes are not allowed to be increased.

System programmer response

Analyze the buffer pool sizes and determine if any can be decreased, or consider adding more memory.