Do we need to perform PostgreSQL clean-up activity after every upgrade

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currently we are in 9.9.2 community edition,

As per the below document do we need to perform Reindexing DB every time or quarterly we can perform, Kindly need your suggestion - Upgrade guide


It’s recommended after major/minor version upgrades – and honestly, most professional setups would have this maintenance be running regularly. See the Postgres documentation on Routine Database Maintenance Tasks