SAP ABAP Data Element LRUS (Number of LRU queues)
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 | LRUS |
Short Description | Number of LRU queues |
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 | ||
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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
The number of Least-Reciently-Used queues specifies the number of queues in the shared memory buffer pool. You can tune the value of LRUS, in combination with the LRU_MIN_DIRTY and LRU_MAX_DIRTY parameters, to control how frequently the shared memory buffers are flushed to disk. These parameters are found in the ONCONFIG* control file located in the $INFORMIXDIR/etc control file.
The minimum value of LRUS is 3, the maximum is 32. The optimal value of LRUS depend on your specific hardware configuration. Your best guide for selecting a vlaue for LRUS is to experiment with different values and monitor the performance benifits. You may find that a larger value increases performance on machines with more than 2 CPUs.
History
Last changed by/on | SAP | 20010130 |
SAP Release Created in |