SAP ABAP Data Element DB2BINUSE (Percentage of buffers currently in use)

Hierarchy

☛ SAP_BASIS (Software Component) SAP Basis Component
   ⤷ BC-DB-DB2 (Application Component) DB2 for z/OS
     ⤷ STU3 (Package) Development Class for Database Monitor

Basic Data

Data Element	DB2BINUSE
Short Description	Percentage of buffers currently in use

Data Type

Category of Dictionary Type	D	Domain
Type of Object Referenced		No Information
Domain / Name of Reference Type	DB2DECPCT
Data Type	DEC	Counter or amount field with comma and sign
Length	5
Decimal Places	2
Output Length	7
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	15	Current in-use
Long	22	Current in-use buffers
Heading	0

Documentation

Definition

The percentage of current in-use buffers is defined as

100 * QBSTCBA / QBSTVPL

where
QBSTCBA:
Number of current active (nonstealable) buffers.
Instantaneous sample of the number of buffers in the buffer pool that were active (in the nonstealable status) at the time of the request to transfer the buffer manager statistical data to the SMF record being produced.
This field is not accumulated.

QBSTVPL:
Number of buffers allocated for a virtual buffer pool.

Because the ratio gives a snapshot value at statistics collection time, it only shows a problem if it happens at this time. The buffer pool might be too small if the value is greater that 50%.

History

Last changed by/on	SAP	20110908
SAP Release Created in	620