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Some question for Oracle database

edited Jul 18, 2020 5:06AM in Database Administration (MOSC) 2 commentsAnswered

Hi Oracle experts,

We have a project for oracle database upgrade from 11g to 19c and want to clearly understand below :

1. execution plan generate by oracle optimizer ? then the execution plan should be between 11g and 19c ?

2. we found a application running with parallel and each parallel process allocate 1G pga,

seems the resource manager can limit the session pga, but will error after reach the limit.

can restrict pga usage by process (e.g. set 1 gb max pga per process, keep running when reach 1gb pga by process)?

3. we planning using sql plan baseline in 19c database, any best practice for implement in Production ?

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