SAP Parameters

 The default profile and the instance profiles are stored in /usr/sap/SID/SYS/profile (and /sapmnt/SID/profile).

To see the list of SAP parameters, run the report RSPFPAR or RSPARAM using SE37. The reports show the parameters for the instance from where you are running the reports. You can use TU02 to display the parameters for all the instances.

You can display the parameters from OS using the following commands

sappfpar name=<SID> nr=<nn>

or

sappfpar pf=<full_path_of_profile>

sappfpar is useful when you want to verfy the paramters while the SAP system is down.

Some parameters can be changed temporarily and dynamically using the transaction RZ11. Use RZ10 to change the parameters permanently but be care - if you start making changes to the parameters using RZ10, a new profile file is created based on the settings in the database and you end up losing the changes that were made directly to the files. You would be under the assumption that it is the parameter that has caused your system to malfunction and try to undo the change, but that would not work.