Solution : https://service.sap.com/sap/support/notes/1266245 (SAP Service marketplace login required)
Key words :
note#619876 - automatic pga memory managementpga management, aggregate pga target parameter, automatic pga tuning, maximum pga allocated, parsed sql statements, memory allocated, assign memory, $pgastat shows, terms workarea_size_policy, pga_aggregate_target reason
Related Notes :
| 789011 | FAQ: Oracle memory areas |