RZ10 is used to maintain and permanently change profile parameters in profiles (DEFAULT, START, INSTANCE), while RZ11 is used to display parameters and, where allowed, change them temporarily at runtime.
## RZ10: step‑by‑step (permanent change)
1. Go to transaction RZ10.
2. From “Profile”, choose the relevant profile (for example, DEFAULT.PFL or the specific instance profile).
3. Select “Extended maintenance” and continue.
4. Use “Utilities → Import profiles → Of active servers” once per system to ensure profiles in DB match OS files, then go back.
5. Click “Change” to switch the profile into change mode.
6. To modify an existing parameter:
- Find and double‑click the parameter (for example, `login/system_client`, `rdisp/wp_no_dia`, `login/no_automatic_user_sapstar`).
- Enter the new value and, if needed, adjust the comment. Save/Copy back to the profile overview.
7. To add a new parameter:
- Choose “Create parameter”, enter the parameter name and value, then save/Copy back.
8. From the profile overview, save the profile; confirm activation when prompted.
9. For static parameters, restart the affected application server so the new values take effect (profiles are read during startup).
Tip for your SAP security work: use RZ10 for permanent security‑relevant settings like `login/min_password_lng`, `login/fails_to_user_lock`, or client defaults, always after taking a backup of the profile file.
## RZ11: step‑by‑step (runtime check / temporary)
1. Go to transaction RZ11.
2. In “Parameter Name”, enter the parameter (or use F4 help to search by prefix such as `login/` or `rdisp/`).
3. Choose “Display” to see:
- Current value, default value, and whether the parameter is changeable at runtime (dynamic vs static).
- Short documentation and allowed value range.
4. If the parameter is dynamic and changeable:
- Click “Change value”, enter the new value, and save.
- This change is effective immediately but is only valid until the next instance restart; it does not update the profile.
5. If there is no “Change value” option, the parameter is static or not changeable here; adjust it in RZ10 and restart instead.[