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Mvcc

Database Administrator

Mvcc questions

5 questions on Mvcc for database administrators, easiest first.

Medium 3

Why PostgreSQL needs VACUUMmedium
Disk not freed after a big deletemedium
Bloat from an idle sessionmedium

Hard 2

Transaction ID wraparoundhard
Index-only scan still reads the tablehard

More Database Administrator skills

PostgreSQL 49 SQL 12 Indexing 12 Replication 12 Query Tuning 11 Data Modelling 10 Backup Recovery 9 High Availability 9 MySQL 9 Transactions 8 Database Security 8 Performance 4 Locking 4

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