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How does DBA_HIST_DATABASE_INSTANCE gets populated

edited Jun 12, 2015 10:03AM in Database Tuning (MOSC) 4 commentsAnswered

I was looking at my AWR and found 5 databases that are not even running on this server in my AWR under the title "Instances in this Workload Repository schema".

Can anyone shed some light as to how the database information gets populated in DBA_HIST_DATABASE_INSTANCE which is in-turn used by awrinput.sql in awrrpt.

Instances in this Workload Repository schema

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

   DB Id     Inst Num DB Name      Instance     Host

------------ -------- ------------ ------------ ------------

* 123         1       ORDB01        ordb01       myhost1

  234         1       ORDE01        orde01       myhost2

  345         1       ORAB01        orab01       myhost3

  456         1       ORBC01        orbc01       myhost4

  567         1       ORDB05        ordb05       myhost5

  678         1       ORDB06        ordb06       myhost6

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