Hierarchy
SAP_BASIS (Software Component) SAP Basis Component⤷
BC-DB-INF (Application Component) Informix⤷
STUI (Package) Informix Database Monitor
Basic Data
| Data Element | CORR_3 |
| Short Description | Logical log sizing by checkpoint |
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 correlation coefficient is given as a guide to the sizing of a logical log. A value of 100 percent indicates that a single logical log on disk is filling, by average, to full capacity by the time the next checkpoint is issued. At least one checkpoint is required per logical log. Therefore a value of 100 percent implies that the triggering of the next checkpoint is due to the filling of a single logical log file.
This value should never reach 100 percent if the physical log is sized properly. That is, a minimum of one checkpoint is required for each individual logical log file.
The proper sizing guldline is by rule of thumb at best. A complete discussion of this topic can be found in "INFORMIX-OnLine Dynamic Server Administrators Guide Volume 1, Version 6.0" page 18-7.can be found under the "physical log file size" help screen.
The "RESET"/"SINCE RESET" buttons can be used to monitor activity for any predetermined window of time.
History
| Last changed by/on | SAP | 20010130 |
| SAP Release Created in |
