PostgreSQL 14 Internals Quiz

Created by Paul Sammy

PostgreSQL 14 Internals Chapter 3

A quiz to test the knowledge of those reading and learning from Postgres 14 Internals book by Egor Rogov, covering topics in Chapter 3.

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1. UPDATE can be regarded as which 2 separate operations?

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2. Page free space can often become fragmented?

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3. CLOG files are stored in which directory?

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4. Which 2 items does a Virtual XID consist of?

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5. status of a subtransaction is written into CLOG?

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6. Indexes values also support multi versioning with several versions of an index value existing at any point in time?

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7. indexes do not use row versioning?

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8. When a row is created, its xmin value is set to the transaction ID of which command?

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9. virtual IDs exist only in PGDATA/pg_vxid when not cached?

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10. Information about subtransactions is stored under?

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