Parameter

Meaning

Parameter Can Be Changed with the Database Manager CLI While in Operation

CACHE_SIZE

Size of the I/O buffer cache (in pages)

No

INSTANCE_TYPE

Database instance type

You define the database instance type when you create the database instance and cannot change it later.

Parameter cannot be changed

KERNELVERSION

Version of the database software

When you install a new version of the database software, the database system updates the value of this parameter.

Parameter cannot be changed

LOG_MIRRORED

Specifies whether the database system mirrors the log area (Log Mode)

This parameter is relevant only when you create a mirror volume with the Database Manager CLI. The Database Manager GUI automatically sets this parameter when a mirror volume is created.

No

LOG_SEGMENT_SIZE

Size of a log segment (in pages).

If automatic log backup is active, the database system automatically performs a log backup as soon as a log segment is full.

No

MAXBACKUPDEVS

Maximum number of files or tape devices in a group of parallel backup media

No

MAXCPU

Maximum number of processors to which the database system can distribute user tasks.

Note that your computer’s operating system resources have to be available for other processes as well as the database system.

No

MAXDATAVOLUMES

Maximum number of data volumes

No

MAXLOCKS

Maximum number of entries in the lock list

No

MAXLOGVOLUMES

Maximum number of log volumes

No

MAXUSERTASKS

Maximum number of user tasks that are active at the same time and therefore the maximum number of database sessions.

If this number has been reached, then no other user can log on to this database instance. If you choose a very high value for MAXUSERTASKS, the database system requires a lot of address space, particularly for local communication via shared memory.

No

MCOD

MCOD = Multiple Components One Database

In SAP systems, indicates if other applications use the database

No

RUNDIRECTORY

Run directory of the database instance

No