Subpool 230

This subpool is used by the z/OS® Communications Server for inbound message assembly for segmented messages. Data management keeps data extent blocks (DEBs) here for any opened data set.

Generally, the size of subpool 230 increases as the number of opened data sets increases. Starting with an initial value of 40 KB to 50 KB, allow 300 to 400 bytes per opened data set.

CICS® DBCTL requires subpool 230 storage for DBCTL threads. Allow 3 KB for every DBCTL thread, up to the MAXTHRED value.