Change the allocation area of BSAM DECB/DCBE/IOB (IGGSAQS/IGGSAQE) to above 16MB

System Environment
z/OS V2.2, Db2z V10
SWA=ABOVE
Batch JOB Region SIZE = 0M
Use Extended TIOT

We use Db2z V10(NFM) and try to REORG TABLESPACE, but REORG JOB is abend with S878.
The table have 372 partitions each partition have 8 auxiliary tables for LOB data.
In Db2z V10, REORG TABLESPACE utility is changed.
"If you specify SHRLEVEL REFERENCE or
CHANGE, you must also specify LOG NO and take an inline image copy."
https://www.ibm.com/support/knowledgecenter/en/SSEPEK_10.0.0/ugref/src/tpc/db2z_reorglobtablespaces.html

When we run REORG TABLESPACE with all partitions, 2977 (1 + 372 x 8) sequential datasets are created for inline image copy dataset.
But z/OS can't allocate these dataset, because the lack of User Region of 16MB bellow.
Each BSAM DECB/DCBE/IOB (IGGSAQS/IGGSAQE) need 4KB area. For all datasets, we need 11(MB) (2977 datasets x 4KB) in 16MB bellow. So, we encounter S878 abend.
We use SMS Storage Group for inline image copy dataset. Because the table size is about 570GB, this is bigger than public volumes in VATLSTxx.
We avoid the x37 abend , use SMS Storage Group.
Then , inline image copy dataset is SMS managed dataset, and have a extended format.

In some case, we have to run REORG TABLESPACE for all partitions for TABLESPACE attribute change.
In the future, we have more big data on z/OS, Db2z.

Our request is bellow.
The SAQ control block which is an internal SAM control block used when processing Striped Data Sets for queueing requests should be changed to reside above 16MB.