SAP ABAP Data Element RSARCHCNT (Archived read counter)
Hierarchy
☛ SAP_BASIS (Software Component) SAP Basis Component
   ⤷ BC-DB-DBI (Application Component) DB-Independent Database Interface
     ⤷ SBUF (Package) Table Buffers
Basic Data
Data Element RSARCHCNT
Short Description Archived read counter  
Data Type
Category of Dictionary Type D   Domain
Type of Object Referenced     No Information
Domain / Name of Reference Type RSDBINT4    
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 7 ArchCnt 
Medium 10 ArchCount 
Long 25 Archived Read Counter 
Heading 25 Archived Read Counter 
Documentation

Definition

After a displacement, the contents of the read counter of a buffered object are set to 0 and archived in an archiving counter (ac) as follows:

ac := ac * weighting factor + read counter

The weighting factor is less than 1, that is, the frequency of access to an object in the past is progressively loses weighting. The archived read counter is used to determine the displacement strategy.

The system displaces all objects

  1. Whose archiving counter is zero
  2. Whose archiving limit is less than a particular limit
  3. Whose modification counter is greater than a particular limit and fulfills the above conditions

until the required amount of memory has become available. The read counter of the objects must be zero.

When is displacement triggered?

At the end of a period (n requests), the current work process decides whether displacement is necessary according to the following conditions:

  • There must be less than 3% free space in the table directory
  • There must be less than 3% free space in the data area
  • The access quality must be insufficient (hit ratio < 95%).

History
Last changed by/on SAP  20141013 
SAP Release Created in