What is Dynamic and Static profile parameter in SAP

Basically there are 2 types of parameters :

• Static (RZ11)
• Dynamic(RZ12) 

Static are the parameters those won't take effect immediately the value is set. Restart of an sap system is required for them to take effect. 

Dynamic are the parameters those will take effect immediately in the run time. Restart of an sap system is not required for them to take effect.

How to determine weather parameter is static or dynamic?

To know weather the parameter is a static or dynamic parameters.

Run the report "TPFYPROPTY" in t-code SE38.

Display the table go to technical content .

Enter the letter "x" in DYNAMIC and then execute.

This result will display all the parameters that can dynamically adjustable.

Note: 

How to know weather parameter is a "static or dynamic parameter"

How to change profile parameter in SAP (RZ10) and (RZ11)

Step-by-step procedure: (Profile Parameter Change – RZ10)

• Login to the SAP system
• Hit the transaction code ‘RZ10′
• Click Utilities and click import profiles
• Click back (F3)
• Place the cursor at profile and click f4
• Double click on Default profile
• Select the Extended maintenance and click change
• Click Parameter (Create F5)
• Place the cursor at parameter name and click F4
• Click a small triangle shape which is available on top of the box
• Type *login* and hit enter
• Double click on ‘login/no_automatic_user_sapstar’ parameter or search for parameter which you want to change
• Type the NEW parameter value
• Click ‘Copy’ Tab and click back (F3)
• Click ‘Copy’ Tab again to transfer The changed profile
• Click Back (F3)
• Click Save, Click back and Click Yes to activate the profile
• Log out from the SAP system
• Stop the SAP System (Server)
• Start the SAP System (Server)

I think I have covered all the steps related to changing a profile parameter; you can validate changes in parameter value through T-Code RZ11 after system restart.