16.20 - Controlling Memory Usage - IBM CICS Interface for Teradata

IBM CICS Interface for Teradata® Reference

prodname
IBM CICS Interface for Teradata
vrm_release
16.20
created_date
October 2018
category
Programming Reference
featnum
B035-2448-106K

The CICS interface provides a mechanism to monitor and control CLI use of memory.

In particular, CICS getmain/freemain overhead can be reduced by using the HSHSPBC and the DMEM command to maintain a number of control blocks and buffers on a free chain to satisfy application requests.

When allocating memory, CLI first attempts to satisfy the request from the free chain.

If the chain is empty, a CICS getmain is used to obtain the memory.

Statistics are maintained and are displayed with DMEM to monitor and control CLI memory usage. Refer to Controlling Memory.