Profile Parameters for the Number Range Buffer

Use

You can configure the number range buffer in the profile parameters.

You can find these parameters and their documentation in the system (transaction RZ11).

Features

The parameters below determine the attributes of the number range buffer.

Parameter Name	Meaning
nobuf/max_no_buffer_entries	Determines the maximum number of entries in the buffer (default value: 1000). Caution The number range buffer cannot be extended dynamically at runtime. When a server is started up, this profile parameter determines how many number range intervals the buffer has space for.
nobuf/max_attempts	Determines how long the number range buffer attempts to assign a number (in seconds). If this time has expired and no number can be assigned, the action is cancelled and an error message is issued. The NUMBER_GET_NEXT function module assigns the number directly in the database. More information: How the Number Range Buffer Works
nobuf/server	If all the numbers of an interval in the buffer are used up, a free work process is needed for the number range server. In cases of extreme high loads, a free work process may not be available. This may result in a server becoming blocked by a deadlock. This parameter is used in such critical situations. It specifies an application server on which all number range servers can be executed (also in a dialog work process). If such overload situations happen frequently, you can start a dedicated server. If you ensure that no other actions are started on this server (the server is not available in any logon group), two or three work processes are sufficient on this instance. Then these will always be available. Recommendation Use this parameter only if you fear high load situations, as described above. Access takes a little longer than when a local process is used, but this way you can prevent server deadlocks when the load is too high.

Parameter Name

Meaning

nobuf/max_no_buffer_entries

Determines the maximum number of entries in the buffer (default value: 1000).

nobuf/max_attempts

Determines how long the number range buffer attempts to assign a number (in seconds). If this time has expired and no number can be assigned, the action is cancelled and an error message is issued. The NUMBER_GET_NEXT function module assigns the number directly in the database.

More information: How the Number Range Buffer Works

nobuf/server

If all the numbers of an interval in the buffer are used up, a free work process is needed for the number range server. In cases of extreme high loads, a free work process may not be available. This may result in a server becoming blocked by a deadlock.

This parameter is used in such critical situations. It specifies an application server on which all number range servers can be executed (also in a dialog work process). If such overload situations happen frequently, you can start a dedicated server. If you ensure that no other actions are started on this server (the server is not available in any logon group), two or three work processes are sufficient on this instance. Then these will always be available.