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. If a transaction aborts, all page changes are reverted(rolled back) in place?

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

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3. The page Special Space is located at the start of the page with highest address

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4. The page header stores checksum and the sizes of the other parts of the page?

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5. Which 2 of the below represent transaction IDs used for row versioning?

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6. To identify different versions of one and the same row, PostgreSQL marks each of them with which two value?

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7. index row headers like table row headers contain xmin and xmax fields?

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8. CLOG contains how many bits for each transaction?

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9. status of a subtransaction is written into CLOG?

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10. Page free space can often become fragmented?

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