performance Tuning imporatant blogs

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https://www.dbamaster.com/2025/03/oracle-database-19c-performance-tunning.html

https://www.dbamaster.com/p/postgresql_31.html

https://www.dbamaster.com/p/mysql_31.html

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Oracle OEM Holistic Patch

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Upgrade Oracle 19c DB to 21c using Auto Upgrade utility inprogress

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