OpenEdge can perform chain analysis online in one of two ways. You can use the dbanalys qualifier or the chanalys qualifier, as shown in the following examples:

• DBANALYS

  proutil db-name -C dbanalys

  Performing chain analysis using dbanalys accomplishes the following:

  • Executes a minimal level online chain analysis
  • Runs as part of database analysis, reporting on the lengths, but not the content of the cluster free, free, RM, and index delete chains
  • Produces minimal performance impact
  • Does not perform sanity checks of offline chain analysis
• CHANALYS

  proutil db-name -C chanalys

  Performing chain analysis online using chanalys accomplishes the following:

  • Executes an intermediate level online chain analysis
  • Produces minimal performance impact due to minimal locking
  • Reports dbkeys of each chain entry
  • Online chain analysis may exit prematurely if:
    • A user presses CTRL+C
    • A block is encountered twice in the chain
    • The number of blocks processed is greater than the number reported in the object block
    • The block is no longer on the chain