## 3.3.1.2.6.1  Updating an ABAP System
Learn how to update your ABAP environment instance.
## Context
After you have created an ABAP environment instance, you can change the following properties:
- ABAP System Description
- Total ABAP Runtime Size (size\_of\_runtime)
- ABAP Runtime Size per Application Server (application\_server\_size)
- Elastic Scaling of the ABAP Application Server
- HANA Cloud Memory Size (size\_of\_persistence)
- HANA Cloud Disk Size (size\_of\_persistence\_disk)
##  Note
The updates of these properties are done without any downtime, or - in case of updating the HANA memory or disk size - with near zero downtime (meaning that the database is not accessible for a few seconds only).
To change the initial admin , you have to use the Maintain Employees SAP Fiori app. See Maintain Employees [page 2727].
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##  Restriction
A downsizing of the HANA Cloud memory size is only possible down to the minimum amount of memory required for a stable performance of the HANA Cloud database. Before the memory size is decreased, an SQL query (as described on SAP HANA Database Downsizing) is automatically run on the database to make sure the downsizing is possible based on the already consumed memory.
The HANA Cloud memory size cannot be decreased while a system is stopped. To decrease the HANA Cloud memory size of a stopped instance, the instance has to be started via the Landscape Portal first.
The HANA Cloud disk size can currently only be increased, and not decreased.
Both the HANA Cloud memory and the disk size can only be resized once every 24 hours.
## Procedure
1. In the SAP BTP cockpit, choose your Cloud Foundry subaccount and navigate to the space, in which you have created your ABAP environment instance. See Navigate in the Cockpit.
2. From the navigation area, choose Services Instances and Subscriptions .
You see a list of all instances that have been created.
3. Select your ABAP environment instance and choose Update by clicking on  (Actions) at the end of the row. If you'd like to check the values that are currently configured first, please select View Parameters instead.
4. In the Update Instance wizard, you can update the parameters listed above. See Increasing the Quota for the ABAP Environment [page 180]. The currently configured values are prefilled in the Update Wizard , so you can keep the values that you don't want to change as they are.
5. Choose Update Instance to save your changes.
Your ABAP environment instance is being updated. This might take a while.
## Change the Service Plan of Your Service Instance
You can update the service plan from one ABAP environment service plan to another. For example: once you've reached the limits of the free plan, you can upgrade the free service plan to a paid plan (standard plan or build-runtime plan). You could also update your standard plan to a build-runtime plan if you have a SAP Build subscription that includes quota for the ABAP environment service.
##  Note
To update the ABAP environment to a paid service plan, you first need to configure entitlements and quotas for the ABAP environment. You need at least the following entitlements assigned to your subaccount:
- service plan: standard or build-runtime (service ABAP Environment)
- quota plans:
- 1 abap\_compute\_unit
- 2 hana\_compute\_unit
For more information, see Increasing the Quota for the ABAP Environment [page 180].
##  Note
It's not possible to switch from a paid plan to a free plan.
1. In your subaccount, navigate to the Instances and Subscriptions page.
2. Find the instance of the service and click  (Actions) and Update .
3. In the Update Instance dialog, change the plan to a new service plan. The following changes are possible:
- From free to standard
- From free to build-runtime
- From standard to build-runtime
4. Click Update Instance to save your changes.