User Guide

SAP AG November 2002
The aim here is to allow the maximum possible number of database sessions [Page 135] to
be supported by the minimum possible number of operating system threads.
The configuration of the database system controls the degree of external/internal tasking via
the two parameters MAXUSERTASKS [Page
86] and MAXCPU [Page 85].
On a computer, 4 processors are available for the database instance [Page
132].
No more than 800 database sessions should be running simultaneously.
In this case, set MAXCPU to 4 and MAXUSERTASKS to 800.
The database instance can then utilize the four processors by establishing four
operating system threads, each of which performs an internal tasking for up to
200 users.
Name of a Standard Backup Medium
The name of a backup medium [Page 127] usually comprises the path details and properties
of the tape device/tapes, autoloader of files under a name that can be selected freely and
which should relate to the practical situation.
In contrast, different naming conventions apply for the external backup medium if you use
external backup tools [Page
138].
See:
Name of external backup medium [Page
145]
Name of External Backup Medium
If you are using external backup tools [Page 138] , there are naming conventions that you
should follow for the backup media [Page
127] .
The following character strings at the beginning of a backup media name determine that
external backup tools are used for backups to this medium or restores from this medium:
Character String Backup Tool to Be Used
ADSM
ADSM/TSM (IBM/Tivoli)
BACK
Backint for Oracle
Backint for SAP DB
NSR
NetWorker (Legato)
If the Database Manager [Page 133] is not to address any of the backup tools listed above,
use backup media names that do not begin with any of the above reserved character strings.
See:
Name of standard backup medium [Page
145]
Operating Mode
The following operating modes exist for a database instance [Page 132]:
User Manual: SAP DB 145