GV$SQL_MONITOR Queries and SQLMON Generation Very Slow after Upgrade to 19c (Doc ID 2792268.1)

Last updated on APRIL 17, 2023

Applies to:

Symptoms

After upgrading to 19.10, this query is slow (takes almost an hour):
  select * from gv$sql_monitor where username='<user>' and status like '%EX%'

The query without the predicate for STATUS runs without issue.
  select * from gv$sql_monitor where username='<user>'

Changes

 Upgrade to 19c.

Cause

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