[[metric:oldest_transaction_age]]

Age of the oldest open transaction or visibility horizon.

Referenced by wait events

• Activity/AutovacuumMain
• IO/LogicalSubxactRead
• IO/LogicalSubxactWrite
• IPC/XactGroupUpdate
• LWLock/Autovacuum
• LWLock/AutovacuumSchedule
• LWLock/BtreeVacuum
• LWLock/ParallelVacuumDSA
• LWLock/PerXactPredicateList
• LWLock/ProcArray
• LWLock/SerializableXactHash
• LWLock/WrapLimitsVacuum
• LWLock/XactBuffer
• LWLock/XactSLRU
• LWLock/XactTruncation
• Timeout/VacuumDelay
• Timeout/VacuumTruncate