Hierarchy
SAP_BASIS (Software Component) SAP Basis Component⤷
BC-DB-INF (Application Component) Informix⤷
STUI (Package) Informix Database Monitor
Basic Data
| Data Element | SHMVIRTSIZ |
| Short Description | Initial size of virtual shared memory segment |
Data Type
| Category of Dictionary Type | D | Domain |
| Type of Object Referenced | No Information | |
| Domain / Name of Reference Type | SINT4_NOS | |
| Data Type | INT4 | 4-byte integer, integer number with sign |
| Length | 10 | |
| Decimal Places | 0 | |
| Output Length | 10 | |
| 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 | 10 | Virtual |
| Medium | 15 | Shared memory |
| Long | 20 | Initial size |
| Heading | 0 |
Documentation
Definition
This value gives the size of the first virtual shared memory segment created during OnLine shared memory initialization. It's defined by the database configuration parameter SHMVIRTSIZE.
The size of every virtual shared memory segment created later on is defined by the database configuration parameter SHMADD.
If you have too much virtual shared memory segments please check your database log file whether there is always an important reason like execution of onarchive. Especially if allocation of additional shared memory segments occurs directly after OnLine initialization increase the value in SHMVIRTSIZE. The "INFORMIX-OnLine Dynamic Server Administrators Guide" contains an algorithm for determining the size of the whole virtual segment of shared memory. Please look up description of database configuration parameter SHMVIRTSIZE.
History
| Last changed by/on | SAP | 19950505 |
| SAP Release Created in |
