Starting and Stopping SAP
R/3
Starting the SAP R/3
system involves starting the underlying database and all the SAP processes
configured to run in all application servers. The type and number of processes
are configurable with the start profile and the instance profile parameters.
These processes might include the following:
1.
The operating system and/or network
performance collectors
2.
The central system log collection process
3.
The CPIC gateway server
4.
The message server
5.
The dispatcher processes
6.
The spool processes
7.
The dialog and background processes
Starting the SAP system
first requires starting the database and then the instance processes. Stopping
is the opposite process: first you have to stop the instance processes and then
the database background processes.
To start or stop the SAP
system in a UNIX environment, you must log on as user <sid>adm, The
following commands are available.
The brackets indicate
optional parameters where you can choose just one from the list or none at all.
startsap [R3] [DB] [ALL]
1.
Using the command, startsap R3, only the
SAP instance is started. It is assumed that the database is already running.
Otherwise, the instance will not start successfully.
2.
With the command, startsap DB, only the
database is started.
3.
Using startsap ALL, the system will first
start the database and then the SAP instance. ALL is the fault setting
and can be omitted. If the database is running, it will just start the
instance.
4.
stopsap [DB] [R3] [ALL]
5.
Using stopsap R3, all the instance
processes are stopped.
6.
With the command, stopsap DB, the system
stops just the database. Make sure you first stop the instance processes;
otherwise, the SAP processes will "hang" because no update is
possible.
7.
Issuing the command, stopsap [ALL], the
system stops the SAP instance and then the database. ALL is the default
parameter and can be omitted.
When in distributed SAP
installations with several application servers, pay attention to stopping all
the instances before stopping the database, which is only located in the
database server.
