If one of your PAS for OpenEdge instances does go down, then a new instance can be generated by your load balancer. However, to determine whether an agent crash can be prepared for in the future, deferred logging helps system administrators understand the cause of an agent crash by providing additional logging information.

Deferred logging also helps performance by only recording a small amount of information that is relevant to an agent crash.

Deferred logging in PAS for OpenEdge opens an in-memory buffer to record information immediately preceding a multi-session agent crash. Deferred logging also lets system administrators run an on-demand monitoring check on the instance. The in-memory buffer is configured independently from the agent log and automatically writes to the agent log file in the event of a crash or when it is called through an API.

For more information, see Use deferred logging in PAS for OpenEdge in Manage Progress Application Server (PAS) for OpenEdge.