To avoid deadlocks, UAPs should access resources with the following considerations:

• If the UAP keeps a resource until the end of the transaction, it should acquire the resource as late as possible.
• A resource that can be freed during processing should be freed as soon as possible.
• If multiple resources are to be in use, the resource access sequences of UAPs should be standardized. In addition, the resource access sequences should be standardized within one system.
• The priorities for servicing UAPs which have encountered a deadlock should be predetermined.