The BUFFER_POOL_KEEP and BUFFER_POOL_RECYCLE pool parameters
have been deprecated in release 12c.
A deprecated parameter behaves the same way as a regular parameter, except that a warning message is displayed at instance startup if a deprecated parameter is specified in the parameter file. In addition, all deprecated parameters are logged to the alert log at instance startup
Oracle docs show the query to see deprecated
"In Oracle Database 12c, some
database parameters are deprecated and de-supported, or
To obtain a current list of deprecated parameters, run
the following query in SQL*Plus:
SQL> SELECT name from v$parameter
WHERE isdeprecated = 'TRUE' ORDER BY name;
The query returns a list of the deprecated parameters as
of the date and time that you run it. The following example
shows the query results that appear:
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