Set an Alert for Your Resource Usage
If you’ve subscribed to service entitlements, then you can monitor the number of resources used and determine whether you can buy additional resources. The resource usage is monitored vis-a-vis a defined usage limit (number of resources). You can also create alert rules for service entitlements under promotion to monitor the account balance.
When there is a quota breach, your service is suspended and you can't create new instances. However, your existing instances will continue to run. You must purchase additional resources to continue to use the services.
Note that you can set only soft limits on the total promotion balance but you can set soft or hard limits for a specific entitlement under promotion. Also, you can’t modify or delete system-generated alert rules for a promotion.