User Guide

SAP AG November 2002
MAXLOGVOLUMES
The general database parameter [Page 79] MAXDATAVOLUMES (depending on the version,
may also be called MAXDATADEVSPACES) denotes the maximum number of data volumes
[Page 144].
MAXRGN_REQUEST
The special database parameter [Page 80] MAXRGN_REQUEST denotes the maximum
number of times a task [Page
151] can attempt to access a critical section. If this number is
exceeded, the task lets another task access the CPU as long as it belongs to the same user
kernel thread [Page 14].
MAXSERVERTASKS
The special database parameter [Page 80] MAXSERVERTASKS denotes the maximum
number of server tasks [Page 16] that are allowed when processing tasks.
MAXUSERTASKS
The general database parameter [Page 79] MAXUSERTASKS denotes the maximum number
of users that can work on a database at any one time (user tasks [Page
16], database
sessions [Page 135]).
Overconfiguration exceeding the actual requirement leads to increased demands on address
space, especially shared memory.
Once the number of configured database sessions is reached, no other users can
connect to the database instance concerned. The number of active database
sessions is therefore a critical parameter of database operation and must be
monitored.
MP_RGN_LOOP
The special database parameter [Page 80] MP_RGN_LOOP denotes the maximum number
of times a task [Page 151] may attempt to access a critical section that has been locked by
another task. If this number is exceeded, the status of the task changes to “Waiting”.
OPTIM_BUILD_RESLT
The special database parameter [Page 80] OPTIM_BUILD_RESLT determines how the
Optimizer’s results are structured.
User Manual: SAP DB 86