Once the system-related conditions have been fulfilled, you can activate online realm extensibility for a realm. You do this using the DAL command ACT INCR (see section "Activating online extensibility for a realm (ACT INCR)" in chapter "Activating online extensibility (ACT)"). You must enter two values at activation time:
The first value specifies the scope of an online realm extension, i.e. the number of database pages that are to be added to the realm on each occasion.
The second value specifies the minimum number of free pages; if fewer remain UDS/SQL initiates a precautionary online realm extension.
The request is not executed until the PERFORM command is issued.
Online extensibility remains active for the realm until the DEACT INCR command is issued (see section “Deactivating online extensibility (DEACT)”).
You can use the DAL command DISPLAY INCR or the utility routine BPSIA or BPRECORD, to obtain information about the online extensibility of a realm.
When databases are created, online realm extensibility and also online DBTT extensibility for DBTTs are automatically activated by the utility routines BCREATE and BFORMAT for all realms for which a secondary space assignment > 0 was specified (for details see section “Activating online extensibility when creating databases”).