Updates To HS_FDS_CLASS_DATE View Causing HS Message To Agent Waits
(Doc ID 1536085.1)
Last updated on APRIL 09, 2020
Applies to:Oracle Database - Enterprise Edition - Version 22.214.171.124 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
Using a gateway to a foreign database could cause locks on HS_FDS_CLASS_DATE when several concurrent sessions are trying to fetch data from the foreign database at the same time. Looking at a systemstate dump it shows that two (or more) processes are doing updates to this view which is resulting in HS message to agent waits
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