Initially,fortheAutomaticWorkloadRepository(AWR)statistics,theretentionperiodissetto7days,thecollectionintervalissetto30minutesandthecollectionlevelissettoTypicalinyourproductiondatabase.
YouhavebeenusingtheMemoryAdvisorforthelastthreemonthstogeneraterecommendationsfortuningmemorycomponents.However,whenyouobservetheMemoryAdvisoronaFriday,youfindthatthestatisticsareavailableonlyfortwodays,ThursdayandFriday,ofthatweek.
Whatwouldhavecausedthestatisticstoberemoved?()