SAP ABAP Data Element RA_PERSCAN (Number of sequential scans per read ahead)
Hierarchy
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SAP_BASIS (Software Component) SAP Basis Component
⤷ BC-DB-INF (Application Component) Informix
⤷ STUI (Package) Informix Database Monitor
⤷ BC-DB-INF (Application Component) Informix
⤷ STUI (Package) Informix Database Monitor
Basic Data
Data Element | RA_PERSCAN |
Short Description | Number of sequential scans per read ahead |
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 | 0 | |
Medium | 0 | |
Long | 0 | |
Heading | 0 |
Documentation
Definition
This value is an indicator as to how efficient the sequential scan I/O is on the database server. Online keeps track of the number of sequential scans as well as the number of read-aheads done on the database. It is benificial to try and minimize the number of read-aheads (disk I/O) and at the same time not be too wastfull with the information which is not used resulting from a read-ahead.
History
Last changed by/on | SAP | 20010130 |
SAP Release Created in |