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Many SAP systems make use of standard operating system users that, on the operating system level, have comprehensive access rights to database resources.

Table 1: Special Operating System Groups for SAP MaxDB (Microsoft Windows)


System Default Value






Owner of all database resources

Group member of <sdba_group>




  • Creating databases

  • Analysis and error handling

  • Srating the global listener and X server (SAP MaxDB communicatin server)


sdb <database_name>


Optional; support tasks




  • Installing the database software

  • Granting access rights to operating system users (by their group affiliation)

A SetUID root program is only required for a user change to <sdb_user> .




  • Normal operating system user

  • Accessing the DBM server (requires a valid DBM operator name and a password to log on to the database)

  • Accessing other database tools (for example Loader, SQLCLI), interfaces (ODBC, JDBC, SQLDBC) and all database tools that use these interfaces; a database user name and password are required

<sid> adm



  • SAP system administrator and database administrator in SAP systems

  • Group member of <sdba_group>

sqd <sid>



Not for SAP liveCache databases

SQD<SID> is owner of all database resources and is the operating system user for database administrators.

Group member of <sdba_group>


To keep unauthorized persons from learning the passwords of standard operating system users, we recommend the following measures:

  • Do not adopt the default passwords.

  • Use secure passwords.

  • Change the passwords regularly.

Changing the Passwords of Operating System Users (Unix and Linux)

  1. Log on to the operating system as <sid> adm user.

  2. Open a shell.

  3. Enter the following command:

  4. Enter the old and new passwords.

Repeat the procedure for the sqd<sid> user.

If you use the Network Information Service (NIS), you can read how to change the passwords of operating system users in the NIS Guide.

Changing the Passwords of Operating System Users (Microsoft Windows)

  1. Log on to the operating system as a user from the Administrators group.

  2. Change the password of the operating system user <SID>ADM.

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