SAP ABAP Data Element DB2BGLUN (Unlock castout)
Hierarchy
☛
SAP_BASIS (Software Component) SAP Basis Component
⤷
BC-DB-DB2 (Application Component) DB2 for z/OS
⤷
STU2 (Package) CCMS for DB2 for OS/390
SAP_BASIS (Software Component) SAP Basis Component⤷
BC-DB-DB2 (Application Component) DB2 for z/OS⤷
STU2 (Package) CCMS for DB2 for OS/390
Basic Data
| Data Element | DB2BGLUN |
| Short Description | Unlock castout |
Data Type
| Category of Dictionary Type | D | Domain |
| Type of Object Referenced | No Information | |
| Domain / Name of Reference Type | DB2DEC19V | |
| Data Type | DEC | Counter or amount field with comma and sign |
| Length | 19 | |
| Decimal Places | 0 | |
| Output Length | 26 | |
| Value Table |
Further Characteristics
| Search Help: Name | ||
| Search Help: Parameters | ||
| Parameter ID | ||
| Default Component name | ||
| Change document | ||
| No Input History | ||
| Basic direction is set to LTR | ||
| No BIDI Filtering |
Field Label
| Length | Field Label | |
| Short | 0 | |
| Medium | 15 | Unlock castout |
| Long | 20 | Unlock castout |
| Heading | 0 |
Documentation
Definition
The number of times DB2 issued an unlock request to the coupling facility for castout I/Os that have completed.
When pages are in the process of being castout to DASD, they are locked for castout in the coupling facility. The castout lock is not an IRLM lock. Its purpose is to enforce that only one system can cast out a given page at a time.
DB2 usually includes several pages in one write I/O request for castout. Therefore, the number in this field should always be less than, or equal to, the number of pages cast out; it should be significantly less if several pages are written per I/O. For example, if on average four pages are written per castout write I/O, the number of pages cast out should be four times the number in this field.
History
| Last changed by/on | SAP | 20110908 |
| SAP Release Created in | 700 |
