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Procedure documentation Displaying Read and Write Operations Locate the document in its SAP Library structure

The database instance keeps statistics about the current number of the physical and logical reads and writes since the database instance was last started. You can display these statistics in the Database Manager GUI.

Prerequisites

The database instance is in the operational state ONLINE.

Procedure

Choose Instance ® Information ® I/O.

Name

Type of data area information

Logical Reads

Number of logical read requests

Logical Writes

Number of logical write requests

Physical Reads

Number of physical read requests

Physical Writes

Number of physical write requests

The following data area information is displayed:

Catalog

Data area occupied by the database catalog
Frequent writes to this area indicate modifications to the data structure.

Permanent Data

Data area for permanent data.

Temporary Data

Data area on the hard disk that is used temporarily; required, for example, when constructing selected data sets.

Long Data

LONG columns

Leaf, Level n

Data tree structure The database system stores the SQL data as B* trees (see also Background Knowledge, Data Management Using B* Trees)

SUM

Total number of accesses

Converter

Data area occupied by the converter

 

 

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