SAP ABAP Data Element NUMCKPTS (Number of checkpoints since database startup)
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 | NUMCKPTS |
Short Description | Number of checkpoints since database startup |
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
A checkpoint syncronizes the pages in the shared memory buffer pools with the pages on disk.
There are 5 events which initiate a checkpoint.
1) The default checkpoint interval has elapsed
2) The physical log on disk becomes 75% full
3) Online detects that the next logical-log file to become current contains the most recient checkpoint record.
4) The Online administrator initiates a checkpoint from the On-Monitor, Force-Ckpt menu or from the command line using onmode -c.
5) Certian administrative tasks such as adding a chunk, or a dbspace.
History
Last changed by/on | SAP | 20010130 |
SAP Release Created in |