ST02 – Tune Summary [System Monitoring]
ST02 is used to display the current status of memory resource usage for a specific SAP application server.
Solution: Amend the Buffer parameter values by increasing the old value by adding approx 10% and then restart the system. Buffer swapping is normal as long as the HitRatio > 96% , then you should not have to change it.
Call statistics – Hit ratio > 95% for “Select” and “Select Single”.
ST03N – Workload Monitor [System Monitoring]
ST03N is used to analyze statistical data for the ABAP kernel and monitor the performance of a system. You can display the total values for all instances, and compare the performance of particular instances over a period of time.
The workload overview provides system administrators with various detailed information about the most important workload data, such as the CPU time, the number of database changes, the response times, and so on. You can display the workload overview for all task types (Dialog, Background, RFC, ALE, and Update), or only for one particular task type.
How to Start/Stop SAP System [Unix]
Starting the SAP System
1. Log on in UNIX as a user with SAP administrator authorization (<SID>adm).
2. Enter the command startsap [DB|R3|ALL]. The following applies to this command:
DB starts the database system
# startsap DB
R3 starts the instances and associated processes of the SAP System
# startsap R3
ALL starts both the database system and the SAP System.
# startsap ALL
How to Start/Stop SAP Instance [SAP NW]
1. Call transaction RZ03.
How to Force Start SAPOSCOL [Unix/Linux]
1. Log on to [Unix/Linux] OS level, then switch user to <sid>adm. Type saposcol -d option with help command for available commands list.
1. Kill the SAPOSCOL
# kill
2. Delete the SAPOSCOL shared memory [to clean shared memory]
# leave
3. Start SAPOSCOL
# launch
4. Verify
# stat