Diagnosing a system hang or wait state

The purpose of this section is to guide you through the diagnosis of a system hang or wait state with these topics:

• Overview of a hang or wait includes descriptions of system hangs and wait states and the symptoms you might encouter
• Steps for diagnosing a system hang contains a flowchart and these steps to guide you through diagnosis of an hang or wait state:
  1. Collecting the problem description
  2. Diagnosing a hang or wait during IPL
  3. Diagnosing an enabled wait state
  4. Diagnosing a coded disabled wait state
  5. Diagnosing a system partitioned from a sysplex because of status update missing
  6. Searching the problem reporting databases
  7. Gathering additional data for hangs and waits